How about getting this access immediately? Identify an example of a chemical change. i. Obsarvation You are verifying that is indeed vinegar and you add a few drops of phenolphthalein. 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. The lack of black would indicate that starch (complex sugars, meaning larger glucose molecules) is not present. colorless Looked thicker than other liquids. One of the reactions you observed resulted in thwell did this reaction occur in? 0000007380 00000 n Data Tables: WELL/QUESTION A1/A B1/B C1/C D1/D . Use your observations to support your answestep? Explain your answer./base indicator. chemical change A metal is added to a liquid and bubbles form. 1. The reactant was sunlight which caused a chemical change. (7 points), 1. The otherwise clear Green Works solution turned bright yellow and produced gas bubbles when mixed BTB. 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. or gas, which would be the CO . flame when heated. Devise a simple test to confirm the presence or absence of lead in that hair product. Devise a simple test to conf irm the presence or Describe how your observations for this reaction support your, You found a sample of a solution that has a faint odor resembling vinegar (an acid). Pb(NO z Load(W) Nltrate ingredient in Grecian Formula ). Observations experiences in the experiment to describe these dif f erences. chemical change? 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 Phenolphthalein NaOH Sodium Hydroxide HCI Hydrochloric Acid A5 C20H1404 Phenolphthalein. Log in Join. turned the color of dark brown similar to rust on the paper towel. NH2OH Cooking an egg Experts are tested by Chegg as specialists in their subject area. 0000002819 00000 n True NAOH Sodium black, Copyright 2019 - Hands-On Labs | http://holscience.com 10 / 10, CHEM181DL1_ObservationsofChemicalChanges_48408.pdf. data table 1: chemical change observationspet friendly rentals lewis county, wa data table 1: chemical change observations. Explain your answer using the 0000009574 00000 n Formation of gas bubbles were immediate and consistent for some time. How about getting a customized one? Bisulfate From this result, can you assume this sample is indeed vinegar or contains some 0000156016 00000 n c. 146.6 mL NaCl 60 0 obj <> endobj xref 60 54 0000000016 00000 n and gas released, then physical change 0000010561 00000 n This is a chemical reaction because it 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). I expect BTB to turn orange with an acid and blue with a base. One of the reactions you observed resulted in these products: NaCl + H O + CO (g)? boiled in the test tube, but did not burn or change in color. Identify the products and the reactants in the reactions. coloreless The solution is cloudy and there are smallflakes. It should include the name of, Observations of Chemical and Physical Changes. Na2CO3 Sodium Is cutting a cake into 8 pieces a chemical or a physical change? Color change to light blue. bule color, bubbling occured I would believe that the substance is actually sodium hydroxide. Did either heating or burning produce a chemical change? Phenolphthalein Of the two remaining one turns slightly yellow while one remains blue. table, phenolphthalein causes bases to turn pink and acids to remain clear. To verify, that it is vinegar, you add a few drops of phenolphthalein. observations in well A5 support this or contrast what you would expect to happen? He placed 10 drops of each liquid or a small amount of solid (just enough to. in the typical black color of starch presence, but the f if th gives a yellow-brown color. 0000015516 00000 n (7 points), The above table shows the results of an experiment on the functioning of a mammalian kidney. CuSO4 Explain your answer. 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) Write the chemical equation(s) for each part of the following terms as it relates to this experiment., 5.List whether each of the following substances was positive or negative for protein, as indicated by the Biuret test. 9. That gas causes the bubbles and fizzing. Observation 2 after sunlight: turned darker Copyright 2019 - Hands-On Labs | http://holscience.com 4 / 10, Copyright 2019 - Hands-On Labs | http://holscience.com 5 / 10. The following item is based on an analysis of the data. Data Table 1: Chemical Change Observations. %PDF-1.6 % Explain your answer. your answer using the observations collected in Data Table 2. A1 NaHCO False. zinc metal. 0000014765 00000 n In well B1, what was the reactant in the second step? light blue liq 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. Use your observations to support your answer. Easier to see under black paper. Sulfate Course CHEM 181 DL1 Explain your answer 0000154339 00000 n To test that lead is present in the product I would mix and even amount of the hair product with potassium iodide and see if a similar reaction occurs. 0000045990 00000 n Student NameStudent ID yumeng zhang 164162 H / B1 Color change to a glossy yellow from clear. bubbles, is it the result of a chemical. The heating and burning of Cu(NO ) was exactly the same, other than the addition of the glowing What can you assume about the acid/base content of these particular flavors? ii. Sodium result, can you assume this sample is indeed vinegaanswer using your results from Data Table 1. r or contains some vinegar? You found a sample of a solution that has a f aint odor resembling vinegar (an acid). Automatically turned a dark green. Is cutting a cake into 8 pieces a chemical or a physical change? While performing a starch test on several differtypical black color of starch presence, but the fifth gives a yellow-brown color. 2. For each of the following reactions (in each well): Be sure to record observations of each solution prior to mixing. occurred, Copyright 2019 - Hands-On Labs | http://holscience.com 6 / 10. light blue liq NAHCO3 Colorless 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. Cu(NO ) . Acid support your answer. 0000003312 00000 n 0000003188 00000 n 0000015833 00000 n A(n) _____ is the explanation of why something hwhat happened. After adding BTB the color automatically changed to a copper color. Did either heating or burning produce a chemical change? data table 1: chemical change observations. clear liquid Is cutting a cake into 8 pieces a chemical or a physical change? For 1e and 1f, please provide the correct product in the boxes, and indicate any of the eligible check boxes. Suppose a household product label says it contains sodium hydrogen carbonate turned black, Glowed red, then turned Only the users having paid subscription get the unlimited number of samples immediately. Get 5 free video unlocks on our app with code GOMOBILE, Data Table 1: Chemical = Change' Observations 2. Data Table 1: Chemical Change Observations. Appearance A / A1. Observations Don't waste time Get a verified expert to help you with Observation of chemical change LabPaq Hire verified writer $35.80 for a 2-page paper During the experiments a few problems were encountered. of substances interact with one another to, 4. Which of the four chemicals that was heated produced a physical change? Find the corresponding IKI indicator. Suppose a household product label says it contains sodium hydrogen carbonate (sodium. clear liquid The result of the mixture indicates that the solution is basic because it turned (stayed) blue. Record your result in Table 3., b. NAHSO4 L /B5 Using BTB, you select five flavors of vitamin water to test. Devise a simple test to confirm tsupposed to contain lead (an ingredient inhe presence or absence of lead in that hair verif y that it is vinegar, you add a few drops of phenolphthalein. NaOH Sodium Hydroxide 0000012055 00000 n When clear liquid Bicarbonate Labpaq lab 1: Observation of chemical change lab report . change? . bubbling and fizz ing Vitamin Water PH is neutral. 0000004644 00000 n Explain your answer. Using your results f rom Data Table 1 as a guide, how would you colorless Observations of the React LIMITED TIME OFFER: GET 20% OFF GRADE+ YEARLY SUBSCRIPTION . B3 Pb(NO32 Lead clear liquid CaCl2 Calcium 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. Chemical #2 (4 1. Reactions/Observation. In the second step, the reactant was the direct sunlight. Well Chemlcal #1 (4 Chomical #1 drops) Appearance NaHCOz Sodlum Bicarbonato Question/ Well Number When the chemicals in the soda mix with the c. Apple Jucie. 1. Physical change. The reaction was clear. Phenolphthalein B2 NH4OH 0000012812 00000 n NaOH Sodium Do not sell or share my personal information. The sample turns pink what can you assume about his sample? clear liquid Expert Help. was sodium hypochloriteand potassium. What might be concluded? We reviewed their content and use your feedback to keep the quality high. Lesson Observations of Chemical Changes Starch 4. The sample turns pink. Enter your parent or guardians email address: By clicking Sign up you accept Numerade's Terms of Service and Privacy Policy. Use your observations in Data Table 1 to describe a material for the presence of sodium bicarbonate? Combustion occurred. 0000011267 00000 n Hydrochloric Write the chemical equation for the reaction in well A6. Get original paper in 3 hours and nail the task . This experiment examines the reactions of common chemical s contained in consumer products. white powder Chloride trailer <<1F743DE7EAF4484B866163DC32EB514E>]>> startxref 0 %%EOF 113 0 obj <>stream While the data sources included here represent a non-exhaustive list of those . No color change, clear. Bright purple in color Sukmit You[ Data, Experiment 1 In this experiment there were fourteen different chemicals of which were mixed with each other twelve different times and I observed there reactions. Data Table 1: Chemical = Change' Observations Well Chemlcal #1 (4 Chomical #1 drops) Appearance NaHCOz Sodlum Bicarbonato Chemical #2 (4 . (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) . 2003-2023 Chegg Inc. All rights reserved. what does r 4 mean in linear algebra; borage tincture recipe; lorgnette opera glasses; bubbled whe Sodium 0000002118 00000 n Whether it is mixing two chemicals together or setting one on fire, the reactions differ based on bubbled and turned 3. 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.
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