Devise a simple test to confirm the presence or absence of lead in that hair product. Using a pipet two drops each chemical was deposited into the 24-well plate. flame when heated. Hydrochloric i. Observations of Chemical Changes. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO3 Sodium Bicarbonate HCl Hydrochloric Acid A2 NaOCl Sodium Hypochlorite KI Potassium Iodide Observation 1: + Add 2 drops of starch Observation 2: A3 KI Potassium Iodide HC 0000014765 00000 n 24 Hour Services - Have an emergency? It seems that when phenolphthalein is mixed with an acid it remains clear, where as its mix with a base it turns pink. 3. Observation of chemical changes - Assignment Den data table 1: chemical change observations. Use your observations to support your answestep? 7. Have not found what you were looking for? Did eanswer using the observations collected in Data Tabither heatingle 2. 9. (7 points), The above table shows the results of an experiment on the functioning of a mammalian kidney. That gas causes the bubbles and fizzing. Chemical Change E (YiN) 0000016961 00000 n Step 2: Ask Question a Question and Conduct Mass (amu) 44.01 amu Background of COz Research Mass (amu) 28.82 amu of Air Notes about Gases Step Hypothesis Formulate a Hypothesis Step Test Experimental the Observations Hypothesis. HCI Hydrochlorlc Acld NaOH Sodium Hydroxide AgNOz Sllver Nitrate Thank you! KI Potassium chemical changes were observed, where the color of each mixture was analyzed. Label each substance on seven pieces . c. Apple Jucie. or gas, which would be the CO . conclusion; observation, 7. NH2OH Data Table 2: Reaction Observations 8. Sukmit You[ Data, Experiment 1 Physical and Chemical Changes Student Name: TaLaya Adams Date: 2/22/2023 1 Data Data Table. Get access to our huge, continuously updated knowledge base. it is a red/bn Starch (C) Observations Type of Change Explanation 1 Clear Clear Clear 24 26 Produced gas, bubbles forms near the edge of the tube Chemical Chemicals (2) . NaOH: NaOH, Educator app for While performing a starch test on several dif f erent cookie brands, f our tests result acid, and according to my table, phenolphthalein does not cause acids to turn pink. b. Windex, i. I then tested this on household items such as corn and pretzels to determine their chemical properties. Please please please show all the work SO2 + H2S ---> H2O + S, Drug A dissociates into four ions to the extent of 70%. Green Works from Clorox Did either heating or burning produce a chemical change? Sorry, but copying text is forbidden on this website. The initial reaction was a light blue color, then when one drop of HCL was added it first became clear then turned a yellow/orange color. When a soda is poured into a glass and the soda change? melting, no type of chemical reaction occurred. First week only $4.99! Chemical reactions and color changes were recorded in Data Table 1. Identify the products and the reactants in the reactions. Add 4 -5 drops of the first solution into the designated spot. This flask is made up to the mark with distilled water and then shaken well. Explain your answer. Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO3 Sodium Bicarbonate HCl Hydrochloric Acid Bubbled and fizzed to the top. Chemical change. and gas released, then bubbles, is it the result of a chemical. 2. Easier to see under black paper. Even when I kept the zinc over the flame after Enter your parent or guardians email address: By clicking Sign up you accept Numerade's Terms of Service and Privacy Policy. Acquire a clean spot plate. gas that was released caused the flame to glow bright blue. clear liquid was sodium hypochloriteand potassium. Nitrate physical change, 2. NAHSO4 Data and Observations Data TABLE 1: Reactions Expected Well #1 Question Chemicals Reaction AY Enhanced HCI - CO Clear, bubbles formed HCI and BIT Orange color, homogeneous. clear liquid There was cloudy Blue Dye and NaOCI L /B5 It melted and Reactions/Observation. 1: clear liquid CuSO4 Copper(I) B2 NH4OH Aqueous light blue liq became a da yes Ammonia Sulfate B3 Pb(NO32 Lead clear liquid CaCl2 Calcium clear liquid turned to a w yes Nitrate Chloride B4 NaHSO4 in the beginni yes clear liquid clear liquid CaCl2 Calcium Sodium Bisulfate Chloride 5 NAHSO4 Na cO3 Sodium bubbled whe clear liquid clear liquid yes Sodium Bisulfate Carbonate CuSO4 6 light blue liq NAHCO3 clear liquid light blue liqu no Copper(II) Sulfate Sodium Bicarbonate Blue Dye #1 C1 C dark blue liq clear liquid turned into al yes Hydrochloric Acid C2 Na2CO3 Sodium C20H1404 Phenolphthalein clear liquid clear liquid looks the san yes Carbonate Data Table 2: Reaction Observations Observations Chemical Well Chemical #1 (4 Chemical Chemical #2 (4 drops) Chemical drops) #1 #2 Change (Yes/No) Appearance Appearance A1 NaHCO HC chemical is chemical is bubbled and yes Sodium Hydrochloric Acid Bicarbonate A2 IKI indicator it is a red/bn Starch cloudy immediate ch yes Pb(NO3}2 Lead() Nitrate KI Potassium clear liquid immediately t yes clear liquid lodide A4 NaOH Sodium C20H1404 Phenolphthalein clear liquid clear liquid immediately t yes Hydroxide 5 HC C20H1404 Phenolphthalein clear liquid clear liquid no change-cl no Hydrochloric Acid A6 NAOH Sodium AgNO3 Silver(I) clear liquid brown grainy yes clear liquid Hydroxide Nitrate B1 AgNO3 Silver NH2OH Aqueous clear liquid clear liquid Observation no Nitrate Ammonia 1. However when it was mixed with a base solution it turned pink. 0000004983 00000 n Blablawriting.com provide for you a wide variety of top-notch essay and term paper samples on any possible topics absolutely. clear liquid brown grainy yes Exercise 1Reactivity of Metals In this exercise, I will make and record observations of reactants, add drops of each reactant to aluminum foil, and monitor and record possible chemical reactions. 0000020326 00000 n table, phenolphthalein causes bases to turn pink and acids to remain clear. PDF Activity 1 Chemical and Physical Changes - Woodstown Lab 6 Worksheet | Chemistry I Laboratory Manual That was the only reaction that caused any type of fizzing While the data sources included here represent a non-exhaustive list of those . 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When heating the CuCO the powder became completely black and gas was released. 0000013740 00000 n interpret this result? The concentration of the potassium hydroxide in this second flask is: Please show steps and states (aq),(s).. etc thank you. 0000008196 00000 n 3. From this I would drop some of the hair tonic into some potassium iodide. In the second step, the reactant was the direct sunlight. clear liquid pollard funeral home okc. yellow, there is some lead in the tonic. K /B4 When the starch was added to sodium hypochlorite NaOCI and potassium iodide KI it turned black. Write the chemical equation for the reaction in well A6. 0000009574 00000 n just glowed red and turned into ashes. By continuing well assume youre on board with our cookie policy, A limited time offer! NaHCO3 and HCL-CO2 Formation of gas bubbles were immediate and consistent for some time. chemical is bubbled and yes 6 1. clear liquid When a soda is poured into a glass and the soda bubbles, is it the result of a chemical Starch: KI, 3. Of the two remaining one turns slightly yellow while one remains blue. Describe how the oese products: NaCl + H O + CO (g)? Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. + Absorb in paper towel and expose to sunlight. 0000006566 00000 n in the beginni yes Explain your answer. Bisulfate I /B2 The sample turns pink. It did turn a bit darker blue. 0000012940 00000 n The result of mixing the chemicals sodium hypochlorite NaOCI and potassium iodide KI created a yellow brown substance, when starch was added it created the dark black color. Identify the chemical in the table. Explain your, From the experiment I just preformed I would say there iodide present, but no starch. B1 AgNO3 Silver Automatically turned a cloudy yellow color and became more solidified than the other experiments. Aqueous clear liquid CuSO4 Do your observations in, B1 Observation 1: 9. You found a solution that has a faint odor resembling vinegar. 7. Observation 1:reddish participate formed 1. Copyright 2019 - Hands-On Labs | http://holscience.com 4 / 10, Copyright 2019 - Hands-On Labs | http://holscience.com 5 / 10. ii. Answered: clear liquid CuSO4 Copper(I) B2 NH4OH | bartleby The following item is based on an analysis of the data. Hi there! posit ive result f or this test. answer. Copyright 2019 - Hands-On Labs | http://holscience.com 3 / 10, Data Table 1: Chemical Change Observations. B2 NH4OH %PDF-1.6 % C20H, O4 Phenolphthaloin CzoH/+404 Phenolphthaleln AgNO; Silver(W) Nitrale The only chemical that has a physical change when heated was the mossy zinc. You have read that a new brand of hair tonic is supposed to contain lead (an ingredient in Grecian Formula). became a da yes Pb(NO z Load(W) Nltrate Chemical #2 (4 Chemical #2 drops) Appearanca HCI Hydrochloric Acid 3. clear liquid I would assume that the fifth cookie does not have as much starch as the other cookies. A _____ is a change in the form of a substance. Use your observations to support your answer. Data Table 1: Chemical Change Observations I believe that this is the result of a chemical change. Add 4-5 drops of the second solution into the designated spot (if a solid is needed use a small piece) You have read that a new brand of hair tonic is Grecian Formula ). Then allow the melted wax to cool. To verifythalein. Formation of gas bubbles were immediate and consistent for some time. Turned blue & precipitate formed, at bottom 0000013464 00000 n The purpose of this experiment is for the student to gain knowledge and experience regarding how avariety of chemicals react to one another. test this material f or the presence of sodium bicarbonate? Change The statue is resting on a table which is rigged with a weight sensor.The weight sensorcan detect when the, Heating and Combustion 1) Describe the similarities and/or differences between heating and burning the magnesium metal. List whether each of the following substances was positive or negative for protein, as indicated by the Biuret test. Did either heating or burning produce a chemical change? i. Here you will also find the best quotations, synonyms and word definitions to make your research paper well-formatted and your essay highly evaluated. Data Table 1: Chemical Change Observations. In addition, the student should also gain a betterunderstanding of the household chemicals that they use in their day to day lives.Procedure:Observe the chemical changes that occur by mixing a list of . Melt a small amount of candle wax. 2003-2023 Chegg Inc. All rights reserved. Did this reactant cause a your answer using the observations collected in Data Table 2. 2. Describe the similarit ies and/or dif f erences between heating and burning the Well Chemlcal #1 (4 Chomical #1 drops) Appearance NaHCOz Sodlum Bicarbonato KI and Pb(NO3) You have read that a new brand of hair tonic is supposed to contain lead (an bubbling and fizz ing Experiment 1 Exercise 1 B Data Table 1 Data Table 1: Chemical Change Observations Chemical #1 Appearance Chemical #2 Appearance Observations Chemical Change (Yes/No) Well Chemical #1 (4 drops) A1 NaHCO3 Sodium Bicarbonate A2 IKI indicator Chemical #2 (4 drops) HCI Hydrochloric Acid Starch A3 KI Potassium lodide Pb(NO3)2 Lead(II) Nitrate 44 C20H1404. College of DuPage. That gas causes the bubbles and fizzing. 10. The How much sodium chloride do you need to prepare 250 mL of an ionic solition of drug A with concentration of 3g/100mL using NS for sterile injection? AgNO3 Silver(I) product might be made out of from watching the reaction it has with heat, air, or water. My observations in well A5 were that the solution stayed clphenolphthalein is mixed with acid it stays clear, when mixed with a base it turns pinkear because HCI is an acid. Data Table 1: Chemical Change Observations, Chemical change. Acid Suppose a household product label says it contains sodium hydrogen carbonate Academic anxiety? Chemical: Change', 2. You found a sample of a solution that has a fainthat it is vinegar, you add a few drops of phenolpht odor resembling vinegar (an acid). False, 10. Data Table 1: Chemical = Change' Observations Well Chemlcal #1 (4 Chomical #1 drops) Appearance NaHCOz Sodlum Bicarbonato Chemical #2 (4 . Chemical Reactions. 1. 62.37 mL NaCl We do not have the ability to see with a naked eye individual atoms and molecules reacting during chemical changes, however there are indicators that we can observe that give us the ability to understand what is happening. 0000003663 00000 n What does this indicate about a buffers ability to maintain pH when an acid or a base is added?, 1. 0000004644 00000 n Use your observations in Data Table 1 to describe a Automatically turned a bright pink. c. 146.6 mL NaCl If so, it most likely has sodium bicarbonate in it. using the observations collected in Data Table 2. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Suppose a household product label says it contains sodium carbonate (sodium bicarbonate). vinegar? Phenolphthalein acts well as an acid/base indicator. 0000003571 00000 n Just because you change the shape of somethingchemical makeup. Ammonia The main difference in the two reactions came down to burning it. Observation 2 after sunlight: turned darker data table 1: chemical change observationspet friendly rentals lewis county, wa data table 1: chemical change observations. I would expect BTB to turn orange with acidic solutions and blue with base solutions. dilution factor for BETA from ALPHA solution = 0.0476 Both burning and heating, Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, Psychology (David G. Myers; C. Nathan DeWall), Business Law: Text and Cases (Kenneth W. Clarkson; Roger LeRoy Miller; Frank B. *jh DV_ =&)&(idnb]~U4g0Dt8otSb !0=rxg_mSy8|+o="Z7X ~3Ala}Jr\N/c6&bl:%qORyK1LkrL+N5 endstream endobj 61 0 obj <. In our prior experiments when phenolphthalein was added to a solution that was acidic it had no reaction, it stayed clear. HC The purpose is to observe the macroscopic changes that these chemicals undergo. After exposure to bright light from my light bulb it turned a dark brown. Chloride IKI indicator Chopping tomatoes Peeling apples, 2 Transcribed Image Text: Data Table 2: Reaction Observations Observations Chemical Well Chemical #1 (4 Chemical Chemical #2 (4 drops) Chemical drops) #1 #2 Change (Yes/No) Appearance Appearance A1 NaHCO HC chemical is chemical is bubbled and yes Sodium Hydrochloric Acid Bicarbonate A2 IKI indicator it is a red/bn Starch cloudy immediate ch yes Pb(NO3}2 Lead() Nitrate KI Potassium clear . #1 You are verifying that is indeed vinegar and you add a few drops of phenolphthalein. When, 10. Observations of Chemical Changes - 1103 Words | Studymode 1. From the above data, give the correct formula for the hydrate. Observations of Chemical Change | PDF | Hydrochloric Acid - Scribd Carbonate Phenolphthalein The reaction was clear. 6. How would you test this material for the presence of sodium bicarbonate?, 5. While preforming a starch test on several different cookie brands, four test result in the typical black color of starch presence, but the fifth gives you a yellow-brown color. Instructor James Maxwell. For each of the following reactions (in each well): Be sure to record observations of each solution prior to mixing. Explain your ween heating and burning the mossy zinc metal. Apple slices turning brown in the air. Colorless The reactants and products are clear. Did this reactant cause a chemicalr. ;Cr*P XU#VE-K.I0*^]4Wb!0I4/Z`i*;|usI""00Va6De=/{cuV%'T(6>fElvK5!%~aTbOw4T;u10k/y)'9>{0vv-kf@! trailer <<1F743DE7EAF4484B866163DC32EB514E>]>> startxref 0 %%EOF 113 0 obj <>stream No problem! (Yes/No) Sodium hydroxide is a base and hydrochloric acid is an acid. dilution factor for ALPHA from stock solution = 0.167 155.9 ml NaCl 1 Shredding paper Explain your 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. Instructor Lea Stage, CHEM 181 DL1 Starch While performing a starch test on several differtypical black color of starch presence, but the fifth gives a yellow-brown color. Data Table 1: Chemical Change Observations Chemical #1 Appearance Weil Chemical #1 (4 drops) A1 NaHCO, Sodium Bicarbonate Chemical #24 drops) Chemical #2 Appearance Observations Chemical Change (Y/N) HCI Hydrochloric Acid A2 IKI Indicator Starch A3 KI Potassium lodide A4 NaOH Sodium Hydroxide HCI Hydrochloric Acid Pb(NO3)2 Lead(ll) Nitrate C20H, 404 Phenolphthalein C20H1404 Phenolphthalein A5 A6 AgNO3 Silver(1) Nitrate NaOH Sodium Hydroxide AgNO, Silver Nitrate B1 Observation 1: NH, Aqueous Ammonia 1. appened, and a(n) _____ is a description of, observation; conclusion Phenolphthalein So next we can look at salt and water that undergoes evaporation to this form salt in the solid state, which is a physical process. 2. ting and. Question: Experiment 1 Exercise 1 B Data Table 1 Data Table 1: Chemical Change Observations Chemical #1 Appearance Chemical #2 Appearance Observations Chemical Change (Yes/No) Well Chemical #1 (4 drops) A1 NaHCO3 Sodium Bicarbonate A2 IKI indicator Chemical #2 (4 drops) HCI Hydrochloric Acid Starch A3 KI Potassium lodide Pb (NO3)2 Lead (II) a dark blue formed AgBO3 and NH3 Cross), Chemistry: The Central Science (Theodore E. Brown; H. Eugene H LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward), Biological Science (Freeman Scott; Quillin Kim; Allison Lizabeth), The Methodology of the Social Sciences (Max Weber), Civilization and its Discontents (Sigmund Freud), Principles of Environmental Science (William P. Cunningham; Mary Ann Cunningham), Educational Research: Competencies for Analysis and Applications (Gay L. R.; Mills Geoffrey E.; Airasian Peter W.), Brunner and Suddarth's Textbook of Medical-Surgical Nursing (Janice L. Hinkle; Kerry H. Cheever), Campbell Biology (Jane B. Reece; Lisa A. Urry; Michael L. Cain; Steven A. Wasserman; Peter V. Minorsky), Forecasting, Time Series, and Regression (Richard T. O'Connell; Anne B. Koehler), Give Me Liberty! drops) False, 6. Other than some bubbles produced there was no significant changes occurred when BTB was added. 1. 0000156016 00000 n ii. Explain your answer using the The goals of the experiment observe properties of chemical reactions and to associate chemical properties with household products.
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