air while being poured into the glass, a gas is released. The sample turns pink what can you assume about his sample? . interpret this result? NaOH and phenolphthalein Chemical #2 (4 Chemical #2 drops) Appearanca HCI Hydrochloric Acid Data Tables and Observations. clear liquid light blue liq observations in well A5 support this or contrast what you would expect to happen? Automatically turned a bright pink. Hydroxide Explain your answer It did turn a bit darker blue. clear liquid immediately t yes T hink about how phenolphthalein acts as an acid/base indicator. The whole doc is available only for registered users. In our prior experiments when phenolphthalein was added to a solution that was acidic it had no reaction, it stayed clear. Explain your answer. This reaction occurred in A1 I believe. clear liquid Cloudy on top. I got a very similar reaction while burning and heatingburning and turned a green color and turned black afte the Cu(NO3)2. 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. We use cookies to give you the best experience possible. Explain your answer using the i. We have received your request for getting a sample.Please choose the access option you need: With a 24-hour delay (you will have to wait for 24 hours) due to heavy workload and high demand - for free, Choose an optimal rate and be sure to get the unlimited number of samples immediately without having to wait in the waiting list, Using our plagiarism checker for free you will receive the requested result within 3 hours directly to your email. chemical change Chemical: Change', 2. 0000013740 00000 n 0000009574 00000 n How would you test this material for the presence of sodium bicarbonate? Observation 2: 0000009972 00000 n cloudy ii. After adding BTB the color automatically changed to a copper color. Only the users having paid subscription get the unlimited number of samples immediately. The purpose is to observe the macroscopic changes that these chemicals undergo. A chemical reaction is a process where the atomsform new substances. Want to add some juice to your work? Observations of Chemical Changes. The sample turns pink. NaHCO3 sodium bicarbonate is a widely known household product otherwise known as baking soda. 0000026639 00000 n iPad. Carbonate 0000016961 00000 n clear liquid The solution is cloudy and there are smallflakes. The users without accounts have to wait due to a large waiting list and high demand. Explain How would you describe the dif f erences between heating and burning? Cutting a steak, 3. 2 No chemical reaction occurred. lodide clear liquid The reactant was sunlight which caused a chemical change. Institution De Anza College Identify an example of a chemical change. ash, 3 The flame glowed blue Bisulfate 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. Color change to a glossy yellow from clear. Combustion occurred. Data Table 1: Chemical Change Observations I believe that this is the result of a chemical change. 6. Observation 2 after sunlight: turned darker Explain your ween heating and burning the magnesium metal. and turning to ash. occurred, Copyright 2019 - Hands-On Labs | http://holscience.com 6 / 10. chemical reaction and the powder turned What might be concluded? Did this reactant cause a Chemical Change E (YiN) Describe the similarit ies and/or dif f erences between heating and burning the Exercise 1: Observations of a Chemical Change Data Table 1. 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) flame when heated. For 1e and 1f, please provide the correct product in the boxes, and indicate any of the eligible check boxes. 0000006566 00000 n product might be made out of from watching the reaction it has with heat, air, or water. Explain your, From the experiment I just preformed I would say there iodide present, but no starch. Use your observations in Data Table 1 to describe a positive result for this test. Yellow thick precipitate Burning paper A2 helpful when trying to identify the chemical makeup of items. That gas causes the bubbles and fizzing. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). KI and Pb(NO3) NaOH and AgNO3 B3 Pb(NO32 Lead clear liquid CaCl2 Calcium #1 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. Label each substance on seven pieces . In a chemical reaction the reactants are on the _____ of the written chemical equation. When the can is opened the CO2 escaped the liquid causingbubbles. Physical and Chemical Changes Student Name: TaLaya Adams Date: 2/22/2023 1 Data Data Table. From our experiment we know that when lead nitrate is mixed with potassium iodide it creates a thick yellow substance. HCI and phenolphthalein When burning the chemical, the powder still turned black but (I assume) the 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. . Did answer using the observations collected in Data Tabeither heatingle 2. 62.37 mL NaCl Using a pipet two drops each chemical was deposited into the 24-well plate. This is a chemical reaction because it Course CHEM 181 DL1 Sulfate 0000013648 00000 n Automatically turned brown. False. 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. caused the zinc to heat up and melt into a liquid. This would indicate that the solution you are smelling is not vinegar because it acidic and would not turn pink. Think about how phenolphthalein acts as an acidwell A5 support this or contrast what you would expect to happen? Also indicating that it is acidic. The otherwise clear Green Works solution turned bright yellow and produced gas bubbles when mixed BTB. Describe the similarit ies and/or dif f erences between heating and burning the mossy of substances interact with one another to, 4. Coal hypothesis = It activated carbon is added to a beaker with 100mL of water, then it will increase the pH over 48 hours., 1. A metal is added to a liquid and bubbles form. When heating the CuCO the powder became completely black and gas was released. Categorize each change as physical or chemical. Separates to edges leaving hole in the middle. Is cutting a cake into 8 pieces a chemical or a physical change? When the chemicals in the soda mix with the air while being poured into the glass, a gas is released. 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. 0000015833 00000 n Explain your answer. Carbonate. Chemical Reactions. support your answer. The reactant was sunlight which caused a chemical change. To verify, that it is vinegar, you add a few drops of phenolphthalein. From this, Observations of Chemical and Physical Changes. You have read that a new brand of hair tonic is Grecian Formula ). Get a custom sample essay written according to your requirements urgent 3h delivery guaranteed. Or if you need this sample for free, we can send it to you via email. Course Hero is not sponsored or endorsed by any college or university. test this material f or the presence of sodium bicarbonate? 5.00 mL of stock solution is diluted to 25.00 mL, producing solution ALPHA. C20H1404 Explain your answer. Find the corresponding NaOH indicator. Fill in the table below with the results from the monosaccharide test experiment, and your conclusions based on those results., 9. Sodium hydroxide is a base and hydrochloric acid is an acid. What well did this reaction occur in? Use your Identify the products and the reactants in the reactions. Hydroxide From this result, can you assume this sample is indeed vinegar or contains some Color change from clear to bright pink. J /B3 Get 5 free video unlocks on our app with code GOMOBILE, Data Table 1: Chemical = Change' Observations AgNO3 (aq) + NaOH (aq) ------> AgOH (s) + NaNO3 (aq). Looking at the result from our prior experiments where I now know that when BTB turns yellow it indicates higher acidity levels means that that particular flavor of vitamin water is higher in acidity than the ones that were neutral (green), and the flavors that turned blue were the opposite and indicate that the they are more base. SO2 + H2S ---> H2O + S, Drug A dissociates into four ions to the extent of 70%. bule color, bubbling occured observations collected in Data Table 2. Did this reactant cause a chemicalr. Labpaq lab 1: Observation of chemical change lab report, DOCX, PDF, TXT or read online from Scribd, 100% found this document useful, Mark this document as useful, 0% found this document not useful, Mark this document as not useful, Save Observations of Chemical Change For Later, Purpose: To observe the basic properties of chemical reactions and associate those properties, Procedure: I mixed different chemicals in my 96. household items such as corn and pretzels to determine their chemical properties. Explain your clear liquid 0000003848 00000 n Get the detailed answer: Name: Date: Exp 1: Observations of Chemical Changes Lab Section: Data Tables: . Combining dry ingredients (flour, salt, sugar,baking powder) when making muffins 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. Use the litmus test strips to determine if the substances in containers A - C are acidic, basic, or neutral., A. One of the reactions you observed resulted in thwell did this reaction occur in? What does this indicate about a buffers ability to maintain pH when an acid or a base is added?, 1. 0000003663 00000 n The reaction was a misty blue color. In the second step, the reactant was the direct sunlight. clear liquid NH2OH Data Tables: WELL/QUESTION A1/A B1/B C1/C D1/D . Starch: KI, 3. Get access to our huge, continuously updated knowledge base. 155.9 ml NaCl NaHCO3 and HCL-CO2 Explain your answer. 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. Substance Y was likely, C. Explain how the data from Tables 1 and 2 are similar and different from the data in Tables 3 and 4. Aqueous Formation of gas bubbles were immediate and consistent for some time. It should include the name of, Observations of Chemical and Physical Changes. bubbled and turned 9. 0000010561 00000 n 0000002525 00000 n 0000020326 00000 n He placed 10 drops of each liquid or a small amount of solid (just enough to. Chemical change. Boil a small amount of water. I believe that this is the result of a chemical change. A(n) _____ is the explanation of why something hwhat happened. 0000013464 00000 n How about getting a customized one? Title: Observation of Chemical Change Course: General College Chemistry Purpose The purpose is to observe the macroscopic changes that these chemicals undergo. (sodium bicarbonate). yes Explain your ansween heating and burning the Cu(NO ). b. How about getting this access immediately? The goals of the experiment observe properties of chemical reactions and to associate chemical properties with household products. Burning (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) . data table 1: chemical change observations. Just because you change the shape of somethingchemical makeup. Did either heating or burning produce a chemical change?
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