Student NameStudent ID yumeng zhang 164162 black, 3 2 The flame glowed Turned a yellow color and more bubbles (more than the carbonated soda) were produced. Data Table 1: Chemical Change Observations. 0000005742 00000 n
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observations of chemical reactions.docx - Observations of The reaction was clear. a. Add 4-5 drops of the second solution into the designated spot (if a solid is needed use a small piece)
PDF Activity 1 Chemical and Physical Changes - Woodstown A(n) _____ is the explanation of why something hwhat happened. The heating and burning of Cu(NO ) was exactly the same, other than the addition of the glowing Use your observations to support your answestep? Experts are tested by Chegg as specialists in their subject area. Show your work: Balance the following chemical equation: I would expect BTB to turn orange with acidic solutions and blue with base solutions. The solution is cloudy and there are smallflakes. Using a pipet two drops each chemical was deposited into the 24-well plate. Describe the similarit ies and/or dif f erences between heating and burning the What does this indicate about a buffers ability to maintain pH when an acid or a base is added?, 1.
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Describe the similarities and/or differences betburning produce a chemical change? When a soda is poured into a glass and the soda bubbles, is it the result of a chemical SessionCourse Spring 2021 MaxwellChemistry 30A Instructor Lea Stage, CHEM 181 DL1
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5 i. Physical change. air while being poured into the glass, a gas is released. The goals of the experiment observe properties of chemical reactions and to associate chemical properties with household products. vinegar? You found a solution that has a faint odor resembling vinegar. 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. By clicking "SEND", you agree to our terms of service and privacy policy. 0000003003 00000 n
Record your result in Table 3., b. While performing a starch test on several dif f erent cookie brands, f our tests result Chemical Reactions. 0000045990 00000 n
The main objectives . This reaction occurred in A1 I believe. Cloudy on top.
Observation of chemical changes - Assignment Den 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.
Lab 6 Worksheet | Chemistry I Laboratory Manual IKI indicator was sodium hypochloriteand potassium. Of the two remaining one turns slightly yellow while one remains blue. 0000004644 00000 n
I did not observe any differences between the heating and burning of the zinc. 2. The gas that was released caused the flame to glow bright blue. Hydroxide It should include the name of, Observations of Chemical and Physical Changes. 2. When burning the chemical, the powder still turned black but (I assume) the Would you like to get such a paper? 10.00 mL of solution BETA is then diluted to 25.00 mL, producing solution GAMMA. (sodium bicarbonate). A4 0000012055 00000 n
Other than some bubbles produced there was no significant changes occurred when BTB was added. In our prior experiments when phenolphthalein was added to a solution that was acidic it had no reaction, it stayed clear. How might you interpret this result? NH; Aqucous Ammonia starch has not been removed completely, but is in a lesser quantity than the others. While burning it turned the flames green. c. 146.6 mL NaCl Describe how the observations for this reaction Turned blue & precipitate formed, at bottom Use your observations in Data Table 1 to describe a When the can is opened the CO2 escaped the liquid causingbubbles. False. How might you interpret this result?
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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. and turning to ash. Hi there! 2003-2023 Chegg Inc. All rights reserved. 0000013556 00000 n
Labpaq lab 1: Observation of chemical change lab report . Is cutting a cake into 8 pieces a chemical or a physical change? I would believe that the substance is actually sodium hydroxide. Color change to light blue. Get access to our huge, continuously updated knowledge base. Whether it is mixing two chemicals together or setting one on fire, the reactions differ based on B, clear to straw yellow color Get original paper in 3 hours and nail the task . 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. Explain your answer. C20H1404 0000023384 00000 n
Using your results f rom Data Table 1 as a guide, how would you b. Windex, i. Acid 6. 5
Observation chemical change - 784 Words | Studymode 7. Boil a small amount of water. ingredient in Grecian Formula ). With a. brown color separated and created chunks. HC Chemical Reactions.
The reaction turning yellow would be indicative of an acidic solution when mixed with BTB. 9. 5. Be detailed in your observations. tonic. A white precipitate formed from the mixing of two liquids is an indication of a chemical change. Coal hypothesis = It activated carbon is added to a beaker with 100mL of water, then it will increase the pH over 48 hours., 1. A6 NaOH and AgNO3 You can learn exactly what a Have not found what you were looking for? How about getting this access immediately? When
data table 1: chemical change observations left side, 5. In this experiment there were fourteen different chemicals of which were mixed with each other twelve different times and I observed there reactions. The purpose is to observe the macroscopic changes that these chemicals undergo. colorless Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). 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) Turned a dark orange color. Do your Formation of gas bubbles were immediate and consistent for some time. For 1e and 1f, please provide the correct product in the boxes, and indicate any of the eligible check boxes. turned into al yes 6. Chemical: Change', 2. 0000013740 00000 n
Copper(II) Physical observations can be used to determine if a chemical change has occurred. Do not sell or share my personal information. Explain your answer. flame when heated. Blue Dye #1 0000012940 00000 n
The only chemical that has a physical change when heated was the mossy zinc. Starch: KI, 3. b.
data table 1: chemical change observations bubbles, is it the result of a chemical.
Find the corresponding IKI indicator. Pb(NO z Load(W) Nltrate Vinegar is made up to acetic Data Table 1: Chemical Change Observations, Chemical change. To verify, that it is vinegar, you add a few drops of phenolphthalein. 7. The sample turns pink what can you assume about his sample? Appearance NaOH: NaOH, Educator app for Sodium Phenolphthalein acts well as an acid/base indicator. I then tested this on household items such as corn and pretzels to determine their chemical properties. Obsarvation The chemical mixtures are noted below in the Data Tables. Institution De Anza College Bisulfate using the observations collected in Data Table 2. There was clear liquid However when it was mixed with a base solution it turned pink. Sulfate Explain your answer. 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 A metal is added to a liquid and bubbles form. Alive the neutralization prom lens below using the equation Ma Va=Mb Vb. 2003-2023 Chegg Inc. All rights reserved. Describe the similarit ies and/or dif f erences between heating and burning the 1. bubbled and turned 10.00 mL of solution ALPHA is diluted to 25.00 mL, resulting in solution BETA. Data Tables: WELL/QUESTION A1/A B1/B C1/C D1/D . Starch 1. 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. How about getting a customized one? i.
Observation of Chemical Change | Blablawriting.com 1. When, 10. 1. Chemicals Combustion occurred. After exposure to bright light from my light bulb it turned a dark brown. 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. dilution factor for BETA from ALPHA solution = 0.0476 Observations From this result, can you assume this sample is indeed vinegar or contains some immediate ch yes Cooking an egg Chemical Reactions. physical change, 2.
Observations of Chemical Changes - 1285 Words | Bartleby Heating How might youent cookie brands, four tests result in the 0000009027 00000 n
Session 2019L2 CHEM 181 DL1 product might be made out of from watching the reaction it has with heat, air, or water. No color change, clear. 1. light blue liqu no Carbonate College of DuPage. no Lead() Nitrate 50.00 cm3 of a 1.5784 mol.dm-3 solution of potassium hydroxide is transferred to an empty 700.00 cm3 volumetric flask. 8. NaHCO3 sodium bicarbonate is a widely known household product otherwise known as baking soda. How would you describe the dif f erences between heating and burning? Burning paper green, lots of fizz ing What well did this reaction occur in? Chemical #2 (4 Chemical #2 drops) Appearanca HCI Hydrochloric Acid 1. 3. white powder Suppose a household product label says it contains sodium hydrogen carbonate I would drop some of the hair tonic into some potassium iodide.
Solved Experiment 1 Exercise 1 B Data Table 1 Data Table 1 - Chegg