melts (see Figure L2.1). To observe some properties of chemical reactions 2. Heat gently over a burner flame until the wax melts completely; then allow, 1. Most acid-base solutions are colorless and determining when one reactant has been totally consumed is difficult by simple observations. . Put two drops of lead nitrate solution into box 2. In the first experiment when the agent was under the . melts (see Figure L2.1). Physical and Chemical Changes For each of the following, record your observations. Conclusion The purpose of this lab is to observe and make qualitative and quantitative measurements during a chemical reaction. Zinc metal granules see CLEAPSS Hazcard HC107. Part 1: Chemicals Well No. Safety- To work with the chemicals used in the lab, it is required to wear safety goggles to protect your eyes from the fumes when working with the chemicals. 5 Signs of a Chemical Change 1. change in color 2. evolution of gas 3. temperature change w/o use of heat 4. release of energy in form of heat or light 5. formation of new substance Proper way to Dispose of Excess Reagents 1. Summary. cloudy blue hue, concentrated to the drop area until mixed. Observing chemical changes - student sheet, Observing chemical changes - teacher notes, Unit A2 2: Analytical, Transition Metals, Electrochemistry and Organic Nirtrogen Chemistry. Version 42-0145-00-02 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. Barium sulfate is used as a barium meal in medicine since it is opaque to X-rays. VIII. This reaction occurred in A1 I believe. Retrieved 21:47, April 03, 2022, from https://www.writework . EXPERIMENT 1: Observations of Chemical Changes. The Lab Report Assistant is simply a summary of the experiment's questions, diagrams if needed, and data tables that should be addressed in a formal lab report. Observe physical and chemical changes. 2. These experiments were completed. I would drop in some hydrochloric acid and see if the household product fizzes and releases gas. A chemical change occurs when the chemical makeup of the substance changes, and a new substance or substances are formed. If solid, throw out in trash Abbreviations for (cr), (s), and (aq) (cr) - solid powder Exercise 2: Heating and Combustion. Procedure: A series of chemical reactions were performed to record observations about chemical . brown color, deep wrinkles was the final product. Electroplating a metal. When a soda is poured into a glass and the soda bubbles, is it the result of a chemical change? This is a chemical reaction because it turned the color of dark brown similar to rust on the paper towel. The purpose of this lab was to identify what a chemical change and what a physical change is. In this visually engaging series of experiments, students observe and identify the chemical changes that take place in a range of reactions on a microscale. 4. To observe some properties of chemical reactions 2. Calculations: None. Essay about Lab Observations of Chemical Changes. The practical features displacement, redox and precipitation reactions between various salts, including potassium manganate(VII), barium nitrate and ammonium vanadate(V). Observations would most closely match my classmates and not interpretations because observations are objective and interpretations are subjective. How might you interpret this result? 2. 586 Words3 Pages. The Lab Report Assistant is simply a summary of the experiment's questions, diagrams if needed, and data tables that should be addressed in a formal lab . Abnormal Gut Fermentation: Laboratory Studies reveal Deficiency of B vitamins, Zinc, and Magnesium . Used Vexus Dvx 20 For Sale, hol observation of chemical changes lab report 08 Jun. At least one photograph must show the student's face. michael skurnik net worth &nbsp>&nbsphow to box braid short hair for guys &nbsp>  hol observation of chemical changes lab report Lab Report 2 Observations of Chemical Changes Objectives: (1 of 20 points) The objectives of this experiment are: 1. Observe, and record any changes over the next ten minutes. Objectives: (1 of 20 points) The objectives of this experiment are: 1. Add two drops of sodium hydroxide to the barium nitrate solution. Using your results f rom Data Table 1 as a guide, how would you test this material f or the presence of sodium bicarbonate? 10. Sodium Chloride and sand mixture. The samples should be observed continuously, so that the melting point of the is not missed. This could be seen more easily with the black paper underneath the well plate B. HCl + BTB C1 Once I added the Bromothymol Blue indicator, it turned an orange-like color C. NH3 + BTB Observations of Chemical Changes. Solution :- Chemical change means the making and breaking of bonds means some molecules reacts to form new molecules of the di . Observations of the Reaction A. NaHCO3 + HCl A1 Bubbles immediately formed and started popping (not rapidly). Exercise 1. Data Table 2: Observation of Physical and Chemical Changes. Data Table 1: Chemical Change Observations. Then, potash solution was added. Use your observations in Data Table 1 to describe a posit ive result f or this test. The reaction was observed and then 1 drop of HCI was . It will have no effect because the phenolphthalein only changes color depending on the pH level. After this step was completed I combined three different household cleaners with bromthymol blue to observe whether the cleaner was an acid or base. Differentiate between a physical and a chemical change. Can you identify these changes as I make lemonade in this video! This gradually changes to the brown iron(III)hydroxide as the iron is oxidised. Read through the experiment for directions to complete this lab. We review their content and use your feedback to keep the quality high. See the accompanyingguidance on apparatus and techniques for microscale chemistry, which includes instructions for preparing a variety of solutions. using well plates with chemical filled pipets and by heating and combusting select elements. Indicators must be carefully chosen based on the pH of the equivalence point of the titration. Mitchell Field Community Centre Covid Vaccine, First, the fat had to be rendered (melted and filtered). Another example is methyl orange, which is red in acids and yellow in alkali solutions., When sufficient NaOH has been added to react with all of the acid, the titration is complete -- the equivalence point has been reached. This document is not meant to be a substitute for a formal laboratory report. (1) No initial reaction observed (2) Purple- grey color change. Procedure: A series of chemical reactions were performed to record observations about chemical . Lab report Basic Organic Chemistry (CHM200) Experiment 1 Determination of Melting Points Reported to: Dr. Jinan ABDEL KADER Reported by: Farah AL Dakkour Amar Deeb Hiam Chahade Date of submission: 11/01/2018 Activity objective: This experiment involves identification of an unknown solid by its melting point, since we have listed the melting points of a lot of substances Compound M.P, C. When Bromothymol Blue reacts with an acid, it turned orange, and when it reacts with a base, the end result is blue. Background Information: (2 of 20 points) Chemical changes are often accompanied by physical changes. Labpaq Physical And . In our hypothesis we thought that the blue candle would burn faster because the chemicals put into the candle to make the color would burn fatser. This e-text is free and accessed online via a link in Blackboard. Magic Crystals . Textbook: Chemistry 2e, OpenStax, 2019. Observation of Phy & Chem Observations (FINAL) lab 8 Observations of Chem Changes Lab Exercise answers.docx 2 Lab 4 Report lab 5 Observation of Chemical Change.rtf 2 CHM131_309_ObservationsofChemicalChanges_94772.pdf 12 Extra Credit 3.docx 1 View more Study on the go Download the iOS Download the Android app CHEM 181 DL1 Observations of Chemical Changes. 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A deep blue colour of tetra-amminocopper(II) forms. Exercise 1. 7. The ancient Roman tradition called for mixing rain water, potash and animal tallow (rendered form of beef or mutton fat). Chemical changes happen around us all the time and not just in a chemistry lab. To associate chemical properties with household products Background Information: (2 of 20 points) Chemical changes are often accompanied by physical changes. Exercise 2: Heating and Combustion. EXPERIMENT 1: Observations of Chemical Changes. If so, it most likely has sodium bicarbonate in it. After all the ingredients are added, they should . Privacy Guaranteed - 100% Plagiarism Free Writing - Free Turnitin Report - Professional And Experienced Writers - 24/7 Online Support, Copyright 2019 - Hands-On Labs | http://holscience.com 1 / 10, Student ID 48408 Lesson Observations of Chemical Changes Institution Ocean County College Session 2019L2 CHEM 181 DL1 Course CHEM 181 DL1 Instructor Lea Stage, CHEM 181 DL1 Observations of Chemical Changes. 5. formation of new substance. Final Report. Observations would most closely match my classmates and not interpretations because observations are objective and interpretations are subjective. chemical reactions in this lab. Supergirl Fanfiction Kara And Lena Secret Child, Describe the similarities and/or differences between heating and burning the magnesium metal. Describe how your observations for this reaction support your answer., 3. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). 2. evolution of gas. chemical use and application from development agents, 23.7% from neighbor framers/friends, and 3.3% from traders, while the rest 6.1 % fr om reading labels and 4.9% from farmer's association as . The starch has not been removed completely, but is in a lesser quantity than the others. The experiments should take approximately 20 minutes. The purpose of this experiment is to determine the enthalpy change for the reaction between aqueous sodium hydroxide (NaOH) and aqueous hydrochloric acid (HCl). Solution :- Chemical change means the making and breaking of bonds means some molecules reacts to form new molecules of the . February 19, 2021 Spring 2021. T hink about how phenolphthalein acts as an acid/base indicator. Experts are tested by Chegg as specialists in their subject area. Safety: 1. Throughout this experiment, indication that chemical changes are taking place is to be noted. This website uses cookies and similar technologies to deliver its services, to analyse and improve performance and to provide personalised content and advertising. 1. Sodium hydroxide is a base and hydrochloric acid is an acid. The new mixture was viewed on a light and on a dark . VIII. Allow the candle to burn for a few minutes noting any changes. The samples should be observed continuously, so that the melting point of the is not missed. Color appeared. Synthesis - A reaction where two reactants combine to form 1 product. If so, it most likely has sodium bicarbonate in it. I believe that explanation number three is right because the flame causes carbon dioxide to be created and that. 9. Chemical Change Lab. 5. Add 5-10 drops of potassium iodide solution. A greenish precipitate of iron(II) hydroxide forms. Army Convoy Sp, Teaching notes and expected observations. Gaseous, Cloudiness (bubbles) on top of the solution. I would drop in some hydrochloric acid and see if the household product fizzes and releases gas. In a physical change, one or more physical properties of a substance are altered. Observe physical and chemical . Question: Identification of Gases Hands-On Labs, Inc. So the white candle burned fastest and, Qualitative Observation Of A Chemical Reaction Lab Report, Qualitative Observation of a Chemical Reaction. The resources originally appeared in the bookMicroscale chemistry: experiments in miniature, published by the Royal Society of Chemistry in 1998. Because it is very insoluble it is non-toxic, unlike other, soluble, barium compounds. Disclaimer: Tutors are not employees or representatives of TutorsOnSpot.Com, Join The Community Already Trusted By Thousands Of Students Like You, Online Financial Statement Analysis Tutors, Online Online Capsim Simulation & Rounds Tutors, Online Online Classes | Quizzes | Exams Tutors. Chemical Reactions Hands-On Labs, Inc. To associate chemical properties with household products Background Information: (2 of 20 points) Chemical changes are often accompanied by physical changes. 3. temperature change w/o use of heat. 2. Experts are tested by Chegg as specialists in their subject area. Put two drops of ammonium vanadate(V) solution into box 5. If the substance begins to turn yellow, there is some lead in the tonic. If so, it most likely has sodium bicarbonate in it. The surfaces of the pieces of zinc turn red-brown as copper metal deposits via a displacementreaction. When the chemicals in the soda mix with the air while being poured into the glass, a gas is released. Jesse Smith Ink Master Portrait, Read our privacy policy. Conclusion The purpose of this lab is to observe and make qualitative and quantitative measurements during a chemical reaction. Observations would most closely match my classmates and not interpretations because observations are objective and interpretations are subjective. Version 42-0145-00-02 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. Final Report. Add one drop of potassium thiocyanate solutionto the iron(III) nitrate solution. G1 The reaction . A popular stereotype is that men are more cooperative and pleasant in negotiations than women. Exercise 1. At least one photograph must show the student's face. Version 42-0186-00-02. Lab Report: Physical and Chemical Changes. Barium sulfate is used as a barium meal inmedicine since it is opaque to X-rays. The intent is to facilitate students' writing of lab reports by providing this information in an editable file which can be sent to an instructor, Exercise 1: Reactivity of Metals Data Table 1. Shake the flask. Just wait here to get the offers for your project Let our expert academic writers to help you in achieving a+ grades in your homework, assignment, quiz or exam. LAB REPORT 4 Observations of Chemical and Physical Change PART 1 - OBSERVATIONS OF CHEMICAL CHANGE No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. Vinegar is made up to acetic acid, and according to my table, phenolphthalein does not cause acids to turn pink. In this lab, copper (II) chloride, CuCl 2 Observations of Chemical Reactions with Aluminum Foil. Final Report. Observation Of Chemical Changes Lab Report. Expert Answer. A scheme is usually a sequence of two or more chemical reactions that together . Specify whether each of the following changes is . 4.7. B) Analysis Questions Milk going sour. Lab Report 2 Observations of Chemical Changes Objectives: (1 of 20 points) The objectives of this experiment are: 1. Place small samples of each in the appropriate dishes. Put two drops of iron(II) sulfate solution into box 6. At least one photograph must show the student's face. Title: Observations of Chemical and Physical Changes Experiment Objective: The objective of this experiment is to observe and record chemical and physical changes in substances. Skip to document. Quickly melted and broke off onto burner, returned to a solid quickly, small melting, Observations of Chemical and Physical Changes. After 5 minutes, record your observations. While the distinction between physical and chemical change is a useful one it should be seen as more of a continuum. Identify the following as examples as either Physical or Chemical changes . Fill in this lab report and answer the questions. Lab 4: Observations of Chemical and Physical Changes Lab Report: Go to the HOL website and read the Explore section for background information. Problem Solving - balance chemical equations; Calculations. Observe, and record any changes over the next ten minutes. Zillow Hurricane Utah, The following notes explain the expected observations for each step/reaction: A dense white precipitate of barium sulfate forms. Experts are tested by Chegg as specialists in their subject area. worksheets and lab data sheets for that episode keeping the printed sheets in order by page number, properties of gases labpaq hands on labs in science submitted by fjvalencia words 356 pages 2 chemistry lab 12 10 11 purpose the purpose of this lab is to see the physical and chemical properties of gases and to be able to use these properties to . Heat slowly to acquire the most accurate results. A + B C. 2 NA (s) + CI 2 (g) 2NaCL 2 (s) Decomposition - A reaction where a single reactant separates to form two or more . Lab Report for Experiment #3 Laboratory Techniques and Measurements Student's Name: Date of Experiment: 10/13/2012 Date Report Submitted 10/15/2012 Title: Observations of Chemical Changes Purpose: To learn about the international system of units (SI), to become familiar with common lab equipment and techniques, to gain proficiency in determining volume, mass, length, and temperature of a . (Half equations only required e.g. Submit your completed report on Blackboard. 3. How do physical changes differ from chemical changes? IX. With water, light energy from the sun, and carbon dioxide from the air, photosynthetic organisms are able to build simple sugars. Retrieved 21:47, April 03, 2022, from https://www.writework . For regularly shaped solids, such as a cube, sphere, cylinder, or cone, the volume can be calculated from its measured dimensions (length, width, height, diameter) by using an appropriate equation. Barium hydroxide is alkaline andgradually absorbs carbon dioxide from the air to form the insoluble barium carbonate. Lab report Basic Organic Chemistry (CHM200) Experiment 1 Determination of Melting Points Reported to: Dr. Jinan ABDEL KADER Reported by: Farah AL Dakkour Amar Deeb Hiam Chahade Date of submission: 11/01/2018 Activity objective: This experiment involves identification of an unknown solid by its melting point, since we have listed the melting points of a lot of substances Compound M.P, C. Headway Lab. In this lab, copper (II) chloride, CuCl 2 Did either heating or burning produce a chemical change? Solution :- Chemical change means the making and breaking of bonds means some molecules reacts to form new molecules of the . Is cutting a cake into 8 pieces a chemical or a physical change? Need 600+ words and 1+ schoarly references in Apa format with no plagiarism follow instructions below. One of the reactions you observed resulted in these products: NaCl + H2O + CO2(g)? Some indicators are a change are exothermic (heats up), endothermic (cools of, precipitate (solid forms), and color change. The heat and smoke of burning charcoal are the products of a combustion reaction. Expert Answer. Explain your answer. Conclusion The purpose of this lab is to observe and make qualitative and quantitative measurements during a chemical reaction. Observations would most closely match my classmates and not interpretations because observations are objective and interpretations are subjective. Copyright 2019 - Hands-On Labs | http://holscience.com 3 / 10, Data Table 1: Chemical Change Observations. Decent Essays. Observations of Reactants : Zinc is in solid state and copper sulfate in aqueous state. Use your observations to support your answer. Experiment IV. Put two drops of barium nitrate solution into box 8. Chemical changes involve the rearrangement of molecules or atoms and result in the pro-duction of one or more new substances. Immediate bright yellow-orange color (muddy) with gaseous consistency. 4. Because it is very insoluble it is non-toxic, unlike other, soluble, barium compounds. Get First 2 Pages Of Your Homework Absolutely Free! LAB REPORT 4 Observations of Chemical and Physical Change PART 1 - OBSERVATIONS OF CHEMICAL CHANGE No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. Place a small amount of wax from a birthday candle into a test tube. Exercise 1. Chemical changes create a new chemical substance, whereas a physical change is a change in appearance or state of matter. Some chemical change examples in our everyday life are mentioned below. 5 Signs of a Chemical Change. In well B1, what was the reactant in the second step? The reactant was sunlight which caused a chemical change. Place small samples of each in the appropriate dishes. Calculations: None. Explain your answer. In simple acid-base titrations a pH indicator may be used, such as phenolphthalein, which becomes pink when a certain pH (about 8.2) is reached or exceeded. Place the thermometer and the capillary melting point tubes in the Mel-temp apparatus chamber. 1. change in color. 1. change in color. 5. Phenolphthalein acts well as an acid/base indicator. Observations of Chemical and Physical Change PART 1 - OBSERVATIONS OF CHEMICAL CHANGE No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. Add two drops of iron(II) sulfatesolution to the potassium manganate(VII) solution. Lab 4: Observations of Chemical and Physical Changes Lab Report: Go to the HOL website and read the Explore section for background information. Enthalpy Of Neutralization Lab Report. 1. Information about your use of this website will be shared with Google and other third parties. 3. 7. Laboratory 25 . Added 5 grams of cobalt carbonate to 20 mL of hrdrobromic acid in a beaker. This problem has been solved! hol observation of chemical changes lab report hol observation of chemical changes lab report. Outline those changes in properties or changes in energy that resulted from the chemical reactions you observe. I would drop in some hydrochloric acid and see if the household product fizzes and releases gas. Submit your completed report on Blackboard. Teaching notes and expected observations. I would drop some of the hair tonic into some potassium iodide. The user-generated content in online communities, which keeps growing, is a valuable source of information for both community users and business industry associated with this type of platforms, as hotel industry [1, 2], where user-generated content, in the form of . The three latter substances were produced in Virginia. This could be seen more easily with the black paper underneath the well plate. Exercise 1. Holly hill acres ltd v charter bank of gainesville, Murder in amsterdam ian buruma sparknotes, Uncle ben's flavor infusions discontinued, Normalization works through a series of stages called normal forms, The answers has to be in a essay form. One of the reactions you observed resulted in these products: NaCl + H O + CO (g)? a Values reported are averages of at least three determinations with average standard deviations of 26%. A scheme is usually a sequence of two or more chemical reactions that together . Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). So, according to the table, phenolphthalein causes bases to turn pink and acids to remain clear. Expert Answer. I would believe that the substance is actually sodium hydroxide. Lab Report Assistant. Chemistry questions and answers. 1. Answer : Reaction 1 : Add Zinc to Copper Sulfate. (2006, January 19). Lab Report 2 Observations of Chemical Changes Objectives: (1 of 20 points) The objectives of this experiment are: 1. The following notes explain the expected observations for each step/reaction: A dense white precipitate of barium sulfate forms. Purpose: The purpose of this experiment is to observe chemical changes in common consumer products to determine if the chemicals are basic, acidic, or remain neutral when mixed with other chemicals., - I believe the food coloring + NaOCI show no evidence of chemical change because they would not combine. Copyright 2019 - Hands-On Labs | http://holscience.com 4 / 10, Copyright 2019 - Hands-On Labs | http://holscience.com 5 / 10. Lab Report 2 Observations of Chemical Changes Objectives: (1 of 20 points) The objectives of this experiment are: 1. The candles were lit and if the candles increasingly burned then we would take a picture and write the results down. To allow us to visually determine this point, we use compounds called acid-base indicators to tell us when a reaction is complete. by. Question: Chemical Reactions Hands-On Labs, Inc. Explain your answer. Fort Lincoln Funeral Home & Cemetery Brentwood, Md, Chemical Reactions Lab Procedures: Lead (II) nitrate and sodium iodide solutions. Chemical battery usage. Exercise 1: Observations of a Chemical Change Data Table 1. Upon mixing, cadet (bright) blue color with small amounts of particles present along. This experiment concluded with testing household chemicals and proper disposal of lab chemicals., Aim: The aim of our investigation was to identify and understand how different chemicals (Acids, alkalis and neutral) react and experience a change in colour due of this., From these results, we could conclude that class cleaner(Clear Image) is basic and 70% alcohol is neutral., In a 50-mL beaker, 2-3 drops of phenolphthalein indicator was added to 9 mL of 0.1 M HCl. If so, it most likely has sodium bicarbonate in it. When the can is opened the CO2 escaped the liquid causingbubbles. physical and chemical properties and changes lab report, biology labpaq experiment answers on properties of water, chemistry 201 physical and chemical properties and, hands on labs, lab 4 physical and chemical properties report lab 4, physical properties of matter thoughtco, observation of chemical change labpaq free essay 4. release of energy in form of heat or light. Physical changes in matter are often reversible: An ice cube can melt into liquid water, and then the liquid water can be frozen back into an ice cube. Read our standard health and safety guidance. Invert a 125 mL Erlenmeyer flask over the lit candle for a few minutes. Read through the experiment for directions to complete this lab. 5.5.12 use, as qualitative detection tests, the formation of precipitates of the hydroxides of Cr, Mn, Fe, Fe, Co, Ni and Cu with NaOH(aq) and NH(aq) and,where appropriate, their subsequent dissolution; 5.5.13 recall the reduction of VO (acidified ammonium metavanadate) by zinc to form VO, V and V; Unit 1: Structures, Trends, Chemical Reactions, Quantitative Chemistry and Analysis. In WriteWork.com. Utilizing the 96-well plate, 2 pipet drops of each chemical were added to the wells in the following combinations: a) NaHCO3+HCl b) HCl+Bromthymol blue c) NH3+1 drop Bromthymol blue d) HCl+blue dye e) Blue dye+NaOCl followed by HCl f) NaOCl+KI followed by various test foods g) KI+Pb(NO3)2 h) NaOH+phenolphthalein i) HCl + phenolphthalein j) NaOH+AgNO3 k) AgNO3+NH3 l) NH3+CuSO4. Add the Alka-Seltzer tablet to the water and quickly seal the Ziploc bag. Get Urgent Writing Help In Your Essays, Assignments, Homeworks, Dissertation, Thesis Or Coursework & Achieve A+ Grades. Exercise 1. Who are the experts? What are the indications of a chemical change, a chemical reaction? Example 1. archangel sandalphon crystal; hol observation of chemical changes lab report. What actually happened was the white candle burned faster. The third explanation resulted in oxygen inside the flask becoming carbon dioxide which then dissolves in water causing the air pressure to decrease under the glass and the higher pressure outside the flask pushed the water up the flask. With the aim of producing a room temperature functional hybrid gel and tackling the high crystallization point, various imidazolium-based ionic liquids were investigated. Observations of Chemical Changes. E1 The reaction turned dark blue. Final Report. The blue colour of the copper(II) sulfate solution fades. Chemical Reactions Hands-On Labs, Inc. Chemical changes involve the rearrangement of molecules or atoms and result in the pro-duction of one or more new substances. You have read that a new brand of hair tonic is supposed to contain lead (an ingredient in Grecian Formula ). Then, 10 mL of 0.1 M NaOH was added drop wise with a pipet to the beaker of phenolphthalein and HCl. Barium sulfate is used as a barium meal in medicine since it is opaque to X-rays. A chemical change is defined as a change in the composition and properties of a substance. CHEM 181 DL1 Observations of Chemical Changes. Scientific Communication - record detailed observations using scientific terminology 2. Find the mass of an Alka-Seltzer tablet and a Ziploc bag filled with 20 ml of water (all at the same time). VIII. Procedure: A series of chemical reactions were performed to record observations about chemical . how to verify an unverified sender in outlook. . burned was observed and recorded. 3. Add a small piece of zinc metal to thecopper sulfate solution. 5. formation of new substance. Put two drops of barium nitrate solution into box 1 (at the top of the middle column). Using the 96 well plate I combined various chemicals together to observe the chemical changes that were created.