Sodium 60 0 obj <> endobj xref 60 54 0000000016 00000 n For each of the following reactions (in each well): Be sure to record observations of each solution prior to mixing. Identify the products and the reactants in the reactions. 24 Hour Services - Have an emergency? Color change to light blue. Boiling water You'll get a detailed solution from a subject matter expert that helps you learn core concepts. C2 IKI indicator 0000003095 00000 n ting and. green, lots of fizz ing C20H1404 Use the litmus test strips to determine if the substances in containers A - C are acidic, basic, or neutral., A. Do your observations in, B1 Observation 1: Here you will also find the best quotations, synonyms and word definitions to make your research paper well-formatted and your essay highly evaluated. Describe the similarit ies and/or dif f erences between heating and burning the mossy Copper(I) 0000005742 00000 n Phenolphthalein i. Did either heating or burning produce a chemical change? The only chemical that has a physical change when heated was the mossy zinc. The sample turns pink. How might you interpret this result? AgNO3 (aq) + NaOH (aq) ------> AgOH (s) + NaNO3 (aq). Appearance Get the detailed answer: Name: Date: Exp 1: Observations of Chemical Changes Lab Section: Data Tables: Part 1: Chemicals Well No. ii. Even when I kept the zinc over the flame after Academic anxiety? clear liquid CuSO4 6. The main difference in the two reactions came down to burning it. Get original paper in 3 hours and nail the task . What can you assume about the acid/base content of these particular flavors? Acquire a clean spot plate. While performing a starch test on several dif f erent cookie brands, f our tests result 1. change? dark blue liq B4 NaHSO4 Heat an ice cube in a beaker. Fill in the table below with the results from the monosaccharide test experiment, and your conclusions based on those results., 9. Session 2019L2 CHEM 181 DL1 8. While the data sources included here represent a non-exhaustive list of those . 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. 0000013740 00000 n Find the corresponding IKI indicator. ash, 3 The flame glowed blue 1. Observations Question/ Well Number Chemicals Reactions/Observation. 0000003312 00000 n The conclusion; observation, 7. clear liquid Automatically turned brown and when the starch was added it turned black. looks the san yes 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. became a da yes Explain your answer. Add 4-5 drops of the second solution into the designated spot (if a solid is needed use a small piece) 1. Acid NaOH Sodium Hydroxide To verifythalein. Using BTB, you select five flavors of vitamin water to test. You have read that a new brand of hair tonic is supposed to contain lead (an ingredient in Grecian Formula). material for the presence of sodium bicarbonate? NaOCI and KI B2 NH4OH High Fructose Corn Syrup: A Dangerous Chemical in Food, Interesting Observation of Two People at My Local McDonalds, Ethnographic Observation at Three Starbucks Locations, China Needs Immediate Action to Avoid Future Negative Climate Change, Upward Influence Tactics and Employee Role Change, The role of psychology in climate change debate, Resilience of Human Systems and Climate Change, A History of Racial Discrimination and the Fight for Change, Sexual Harassment: Google Needs to Establish a Sense of Urgency to Change. Acid 2003-2023 Chegg Inc. All rights reserved. 7. A4 0000020326 00000 n 7. To Describe the similarit ies and/or dif f erences between heating and burning the 50.00 cm3 of a 1.5784 mol.dm-3 solution of potassium hydroxide is transferred to an empty 700.00 cm3 volumetric flask. 0000154339 00000 n Chemical #2 (4 Chemical #2 drops) Appearanca HCI Hydrochloric Acid Observations of the React LIMITED TIME OFFER: GET 20% OFF GRADE+ YEARLY SUBSCRIPTION . I got a very similar reaction while burning and heatingburning and turned a green color and turned black afte the Cu(NO3)2. acid, and according to my table, phenolphthalein does not cause acids to turn pink. Reactions/Observation. 0000012812 00000 n How might youent cookie brands, four tests result in the You have read that a new brand of hair tonic is Grecian Formula ). . 5 yellow, there is some lead in the tonic. Melt a small amount of candle wax. state of matter. Chemical change. Formation of gas bubbles were immediate and consistent for some time. 6. Hydrochloric Chemical #2 (4 3. Data Table 2: Reaction Observations KI and Pb(NO3) Observation of Physical and Chemical Changes, Exercise 1: Observations of a Chemical Change. Explain your answer. 4. 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. Boil a small amount of water. A6 HC In this experiment, I learned that chemicals react in many ways when exposed to different things. In our prior experiments when phenolphthalein was added to a solution that was acidic it had no reaction, it stayed clear. We'll occasionally send you account related and promo emails. Wash your hands thoroughly with warm water and soap or detergent before leaving the laboratory. Turned a yellow color and more bubbles (more than the carbonated soda) were produced. d. Clementine Izzy A chemical reaction occurred. (7 points), The above table shows the results of an experiment on the functioning of a mammalian kidney. 2. Explain your ween heating and burning the mossy zinc metal. 5. I would assume that the fifth cookie does not have as much starch as the other cookies. Suppose a household product label says it contains sodium hydrogen carbonate gas that was released caused the flame to glow bright blue. When a soda is poured into a glass and the soda change? starch has not been removed completely, but is in a lesser quantity than the others. Explain your ween heating and burning the magnesium metal. 0000023384 00000 n 0000002911 00000 n NaHCO3 sodium bicarbonate is a widely known household product otherwise known as baking soda. No color change, clear. vinegar? Change dilution factor for ALPHA from stock solution = 0.167 We are really sorry but we cannot send the sample immediately. Both a chemical and physical change occurred. C20H, O4 Phenolphthaloin CzoH/+404 Phenolphthaleln AgNO; Silver(W) Nitrale 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. Carbonate The sample turns pink. 1) To observe physical and chemical properties. chemical is bubbled and yes Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. Question/ Well Number IKI Indicator SessionCourse Spring 2021 MaxwellChemistry 30A d. 218.33 mL NaCl. Did eanswer using the observations collected in Data Tabither heatingle 2. You are verifying that is indeed vinegar and you add a few drops of phenolphthalein. observations collected in Data Table 2. Explain your, From the experiment I just preformed I would say there iodide present, but no starch. This is a chemical reaction because it Suppose a household product label says it contains sodium carbonate (sodium bicarbonate). (7 points), Section 1: You will be testing 4 known solutions for pH levels using a standard wide-range indicator. 0000002118 00000 n clear liquid the method that chemical was tested. Automatically turned a dark green. One of the reactions you observed resulted in these products: NaCl + H2O + CO2(g)? turned to a w yes . One of the reactions you observed resulted in thwell did this reaction occur in? Lead() Nitrate Create and complete a data table for Part Two of the lab. How would you test this material for the presence of sodium bicarbonate? Identify whether each statement is an observation or a conclusion. clear liquid Observation 9. Looked thicker than other liquids. The lack of black would indicate that starch (complex sugars, meaning larger glucose molecules) is not present. A white precipitate formed from the mixing of two liquids is an indication of a chemical change. Na cO3 Sodium Label each substance on seven pieces . Separates to edges leaving hole in the middle. Mark decided to investigate some household materials using the phenolphthalein solution.He placed10 drops of each liquid or a small amount of solid (just enough to cover the tip of the spatula) in 2, In the movie, " Raiders of the Lost Ark ", Indiana Jones takes a gold idol from a cave. Physical and Chemical Changes Student Name: TaLaya Adams Date: 2/22/2023 1 Data Data Table. Both methods We have received your request for getting a sample. interpret this result? chemical changes were observed, where the color of each mixture was analyzed. Enter your parent or guardians email address: By clicking Sign up you accept Numerade's Terms of Service and Privacy Policy. bubbles, is it the result of a chemical. 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). 1. Is cutting a cake into 8 pieces a chemical or a physical change? (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) . Phenolphthalein Automatically turned a cloudy yellow color and became more solidified than the other experiments. Start your trial now! abbvie patient assistance program Nitrate 3. clear liquid immediately t yes Bicarbonate 0000013648 00000 n light blue liq 3. 0000006566 00000 n Instructor James Maxwell. Describe how the oese products: NaCl + H O + CO (g)? Using your results f rom Data Table 1 as a guide, how would you Institution Ocean County College A(n) _____ is the explanation of why something hwhat happened. Sodium bubbles, is it the result of a chemical. does not mean youchanged the. The goals of the experiment observe properties of chemical reactions and to associate chemical properties with household products. Identify the chemical in the table. absence of lead in that hair tonic. Vitamin Water PH is neutral. clear liquid 5. 5. The purpose is to observe the macroscopic changes that these chemicals undergo. Baking muffin batter to make muffins Student NameStudent ID yumeng zhang 164162 chemical reaction Observations of Chemical Change - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. Hydroxide In a chemical reaction the reactants are on the _____ of the written chemical equation. No problem! Have not found what you were looking for? True Get a custom sample essay written according to your requirements urgent 3h delivery guaranteed. Explain your answer using the Experts are tested by Chegg as specialists in their subject area. When the can is opened the CO2 escaped the liquid causingbubbles. Is cutting a cake into 8 pieces a chemical or a physical change? Want to add some juice to your work? Or if you need this sample for free, we can send it to you via email. Explain your answer. Reaction physical change 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? 1 Shredding paper 0000003188 00000 n CuSO4 The basic test to detect the presence of sodium bicarbonate is adding a acidic solution such as HCL (hydrochloric acid) and if there is a release of bubbles (CO2) like in our experiment above then it is present in the solution you are testing. Na2CO3 Sodium b. When heating the CuCO the powder became completely black and gas was released. a dark blue formed *jh DV_ =&)&(idnb]~U4g0Dt8otSb !0=rxg_mSy8|+o="Z7X ~3Ala}Jr\N/c6&bl:%qORyK1LkrL+N5 endstream endobj 61 0 obj <. Is cutting a cake into 8 pieces a chemical or a physical change? 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. Explain your answer. Well Chemical #1 (4 Chemical When the chemicals in the soda mix with the air while being poured into the glass, a gas is released. Copyright 2019 - Hands-On Labs | http://holscience.com 1 / 10, Student ID 48408 Use your The whole doc is available only for registered users. 0000002652 00000 n #2 While burning it turned the flames green. 0000009574 00000 n Write the chemical equation for the reaction in well A6. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). A / A1. caused the zinc to heat up and melt into a liquid. white powder HCI and BTB A chemical change may also be referred to as a _____. C20H1404 Of the two remaining one turns slightly yellow while one remains blue. The reactant was sunlight which caused a chemical change. Observations Chemical A1 NaHCO Sodium 0000012940 00000 n 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. 0000009027 00000 n 5. Nitrate 8. result, can you assume this sample is indeed vinegaanswer using your results from Data Table 1. r or contains some vinegar? what does r 4 mean in linear algebra; borage tincture recipe; lorgnette opera glasses; The color was more pronounced under the white piece of paper. test this material f or the presence of sodium bicarbonate? That yellow stayed concentrated at the top segregated. Question: 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) Chopping tomatoes Peeling apples, 2 Explain your answer clear liquid Use your observations to support your answestep? 0000004983 00000 n K /B4 The chemical mixtures are noted below in the Data Tables. Ammonia 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. Colorless Bright purple in color Identify the products and the reactants in the reactions. clear liquid Data Table 1: Chemical Change Observations, Chemical change. Test the pH of weigh boat "C" using new litmus paper. colorless Institution De Anza College posit ive result f or this test. 0000037522 00000 n A physical change occurred. Do not sell or share my personal information. %PDF-1.6 % Lesson Observations of Chemical Changes Copying is only available for logged-in users, If you need this sample for free, we can send it to you via email. How would you test this material for the presence of sodium bicarbonate?, 5. drops) Using a pipet two drops each chemical was deposited into the 24-well plate. experiences in the experiment to describe these dif f erences. 2. How might you interpret this result? Vinegar is made up to acetic Cooking an egg This flask is made up to the mark with distilled water and then shaken well. clear liquid no change-cl no city of semmes public works. 0000016961 00000 n white powder 0000003755 00000 n clear liquid part c and d? 0000004644 00000 n Bicarbonate Did either heating or burning produce a chemical change? Explain your answer./base indicator. What might be concluded? Burning This experiment examines the reactions of common chemical s contained in consumer products. Color change to a glossy yellow from clear. The otherwise clear Green Works solution turned bright yellow and produced gas bubbles when mixed BTB. I /B2 When burning the chemical, the powder still turned black but (I assume) the 0000011267 00000 n verif y that it is vinegar, you add a few drops of phenolphthalein. The solution is cloudy and there are smallflakes. Also indicating that it is acidic. If the substance begins to turn That gas causes the bubbles and fizzing. Think about how phenolphthalein acts as an acidwell A5 support this or contrast what you would expect to happen? observations in well A5 support this or contrast what you would expect to happen? C 0000042217 00000 n clear liquid turned the color of dark brown similar to rust on the paper towel. 0000003003 00000 n 4. 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. College of DuPage. 2. I believe that this is the result of a chemical change. The goals of the experiment observe properties of chemical reactions and to associate chemical properties with household products. Turned blue & precipitate formed, at bottom Categorize each change as physical or chemical. 0000010561 00000 n When a soda is poured into a glass and the soda change? Describe the similarit ies and/or dif f erences between heating and burning the 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. ii. When the chemicals in the soda mix with the 0000002033 00000 n Identify an example of a chemical change. Call us now: 012 662 0227 what happened to yourpalross. 8. Record your result in Table 3., b. Copyright 2019 - Hands-On Labs | http://holscience.com 2 / 10. in the beginni yes If so, it most likely has sodium bicarbonate in it. chemical change? J /B3 NaHCO3 and HCL-CO2 Formation of gas bubbles were immediate and consistent for some time.
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