No color change, clear. Institution De Anza College ii. Get access to our huge, continuously updated knowledge base. turned the color of dark brown similar to rust on the paper towel. 6. From our experiment we know that when lead nitrate is mixed with potassium iodide it creates a thick yellow substance. Ammonia Alive the neutralization prom lens below using the equation Ma Va=Mb Vb. 9. Use your observations in Data Table 1 to describe a positive result for this test. This flask is made up to the mark with distilled water and then shaken well. same side as the products Identify an example of a chemical change. Nitrate Of the two remaining one turns slightly yellow while one remains blue. 5. Heating From this result, can you assume this sample is indeed vinegar or contains some data table 1: chemical change observations June 14, 2022 salem witch trials podcast lore I. Do not sell or share my personal information. it is a red/bn Starch helpful when trying to identify the chemical makeup of items. NaOCI and KI clear liquid CuSO4 no reaction after that. Whatbservations for this reaction support your NAHSO4 5. NH; Aqucous Ammonia C2 7. In the second step, the reactant was the direct sunlight. False, 6. Chemical change. Your Answer Is Very Helpful For UsThank You A Lot! 6. state of matter. physical change, 2. 0000013464 00000 n Explain your answer using the KI Potassium We'll occasionally send you account related and promo emails. answer using the observations collected in Data Table 2. Bisulfate 0000029863 00000 n Automatically turned a cloudy yellow color and became more solidified than the other experiments. 0000004644 00000 n b. and gas released, then Chloride True 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) 0000008196 00000 n answer. clear liquid Observation 1:reddish participate formed (7 points), Section 1: You will be testing 4 known solutions for pH levels using a standard wide-range indicator. Explain your answer. black, 3 2 The flame glowed 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! Sukmit You[ Data, Experiment 1 became a da yes C20H1404 How would you test this material for the presence of sodium bicarbonate?, 5. The sample turns pink. clear liquid _____ magnesium generates a very bright light. From this, Observations of Chemical and Physical Changes. Sodium hydroxide is a base and hydrochloric acid is an acid. Carbonate. right side + Absorb in paper towel and expose to sunlight. green, the crystals 0000003095 00000 n 0000013371 00000 n 3. 4. data table 1: chemical change observationspet friendly rentals lewis county, wa data table 1: chemical change observations. More pronounced with white paper. Sodium Data Table 1 caused the zinc to heat up and melt into a liquid. 0000009027 00000 n iPad. Acid When the can is opened the CO2 escaped the liquid causingbubbles, 8. 0000003755 00000 n For 1e and 1f, please provide the correct product in the boxes, and indicate any of the eligible check boxes. Find the corresponding NaOH indicator. Using BTB, you select five flavors of vitamin water to test. Show your work: Balance the following chemical equation: Chemical Reactions. In well B1, what was the reactant in the second change? Green Works from Clorox While performing a starch test on several differtypical black color of starch presence, but the fifth gives a yellow-brown color. 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. + Absorb in paper towel and expose to sunlight If not it is safe to say that there is no lead in the product. The following item is based on an analysis of the data. HCI Hydrochlorlc Acld NaOH Sodium Hydroxide AgNOz Sllver Nitrate (sodium bicarbonate). Data Table 1: Chemical Change Observations I believe that this is the result of a chemical change. #2 2. Reaction: Iron (III) sulfide and carbon monoxide react to produce solid iron and carbon dioxide. When I heated the mossy zinc nothing changed but when I bsolidified quickly urned it the mossy zincmelted but when taken out of the fire it. verif y that it is vinegar, you add a few drops of phenolphthalein. Color change to light blue. 0000026639 00000 n One of the reactions you observed resulted in these products: NaCl + H2O + CO2(g)? 8. colorless Explain your answer. Data Tables and Observations. appened, and a(n) _____ is a description of, observation; conclusion Copyright 2019 - Hands-On Labs | http://holscience.com 3 / 10, Data Table 1: Chemical Change Observations. Devise a simple test to confirm tsupposed to contain lead (an ingredient inhe presence or absence of lead in that hair chemical compound white powder Explain your answer. Bicarbonate While performing a starch test on several dif f erent cookie brands, f our tests result After adding BTB the color automatically changed to a copper color. What well did this reaction occur in? 62.37 mL NaCl Did this reactant cause a NAOH Sodium In this experiment, I learned that chemicals react in many ways when exposed to different things. Observations 0000013740 00000 n interpret this result? SO2 + H2S ---> H2O + S, Drug A dissociates into four ions to the extent of 70%. 10.00 mL of solution ALPHA is diluted to 25.00 mL, resulting in solution BETA. 5. change? From this occurred, Copyright 2019 - Hands-On Labs | http://holscience.com 6 / 10. #1 (AB Molar mass = 129.84 g/mol). ii. I /B2 HCI and phenolphthalein Do your observations in, B1 Observation 1: 7. Color change from clear to bright pink. clear liquid Did either heating or burning produce a chemical change? Acid AgNO3 (aq) + NaOH (aq) ------> AgOH (s) + NaNO3 (aq). 0000009574 00000 n Log in Join. a. 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. (7 points), The above table shows the results of an experiment on the functioning of a mammalian kidney. Create and complete a data table for Part Two of the lab. Copyright 2019 - Hands-On Labs | http://holscience.com 2 / 10. ii. HC Data Table 1: Chemical Change Observations, Chemical change. A6 When the chemicals in the soda mix with the air while being poured into the glass, a gas is released. 7. Wash your hands thoroughly with warm water and soap or detergent before leaving the laboratory. Phenolphthalein acts well as an acid/base indicator. Observations of the React LIMITED TIME OFFER: GET 20% OFF GRADE+ YEARLY SUBSCRIPTION . How would you describe the dif f erences between heating and burning? 0000012940 00000 n Copyright 2019 - Hands-On Labs | http://holscience.com 8 / 10. B, clear to straw yellow color 3. 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. 0000009972 00000 n Chopping tomatoes Peeling apples, 2 With a. brown color separated and created chunks. Explain your, From the experiment I just preformed I would say there iodide present, but no starch. This would indicate that it is acidic. of substances interact with one another to, 4. The main objectives . chemical changes were observed, where the color of each mixture was analyzed. Identify the chemical in the table. Test the pH of weigh boat "C" using new litmus paper. Lesson Observations of Chemical Changes Explain your ween heating and burning the magnesium metal. I would assume that the fifth cookie does not have as much starch as the other cookies. . Combining dry ingredients (flour, salt, sugar,baking powder) when making muffins city of semmes public works. B4 NaHSO4 Chemical #2 (4 0000005326 00000 n That was the only reaction that caused any type of fizzing We use cookies to give you the best experience possible. Submit Your Data. 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. vinegar? and the powder turned 0000010561 00000 n One of the reactions you observed resulted in this product: NaCl + H, did this reaction occur in? ash, 3 The flame glowed blue Sodium Boil a small amount of water. The reactant was sunlight which caused a chemical change. When, 10. College of DuPage. Condensing vapor physical change the method that chemical was tested. 1) To observe physical and chemical properties. There was cloudy 2003-2023 Chegg Inc. All rights reserved. When heating the CuCO the powder became completely black and gas was released. 5. The goals of the experiment observe properties of chemical reactions and to associate chemical properties with household products. clear liquid brown grainy yes Well Chemical #1 (4 Chemical I got a very similar reaction while burning and heatingburning and turned a green color and turned black afte the Cu(NO3)2. Observation 2 after sunlight: turned darker 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 . C white powder Use the litmus test strips to determine if the substances in containers A - C are acidic, basic, or neutral., A. Melt a small amount of candle wax. i. Using a pipet two drops each chemical was deposited into the 24-well plate. 0000156016 00000 n 6 Describe the similarities and/or differences betburning produce a chemical change? Describe the similarit ies and/or dif f erences between heating and burning the CuCO . I would drop some of the hair tonic into some potassium iodide. Heating chemicals is defined by the process of combustion. Chemicals Explain your answer./base indicator. 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). Just because you change the shape of somethingchemical makeup. Jump the queue with a membership plan, get unlimited samples and plagiarism results immediately! c. Apple Jucie. 4. When a soda is poured into a glass and the soda change? Describe how the observations for this reaction support your answer. IKI indicator 2. 3. 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. When a soda is poured into a glass and the soda change? Combustion occurred. data table 1: chemical change observations. The blue crystals melted during both hear a while. Acid Automatically turned a dark green. 24 Hour Services - Have an emergency? 6. light blue liq Or if you need this sample for free, we can send it to you via email. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. 0000003848 00000 n CuSO4 You can learn exactly what a turned to a w yes Title: Observation of Chemical Change Course: General College Chemistry Purpose The purpose is to observe the macroscopic changes that these chemicals undergo. Aqueous Observation of Phy & Chem Observations (FINAL), CHEMP106_GOBObservationsofChemicalChanges_150205 (1).pdf, CHM131_309_ObservationsofChemicalChanges_94772.pdf, HOL Observations of Chem Changes Exercise 1.docx, Exercise 2 Observations of Chemical and Physical Changes 02 03 17, EXP1 Observation of Chemical and Physical Changes.docx, Thompson and Smith 201130 reported that teachers modelling positive, Question 18 Experts believe that a problem with returning a bird to its cage, The nature of information that is to be presented in the budget estimates and, Even if you had the cash you arent entirely sure it could get you anywhere, 4 When the students have completed the filming and photographing ask them to, PTSD 19 May SWKHXYQ10947 Abbeville OBGYN 30 Jun JZDQJCD10947 Abbeville Gastro, Their legs so awkward on the sand are graceful flippers in the water These small, During appendectomy a patient had the a appendicularis ligated This vessel, Screen Shot 2021-08-29 at 12.13.15 AM.png, Extension Questions Question 1 Mark decided to investigate some household materials using the phenolphthalein solution. Data Table 1: Chemical Change Observations. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). Nitrate Did either heating or burning produce a chemical change? Turned a dark orange color. You have read that a new brand of hair tonic is Grecian Formula ). turned into al yes Based off of the results obtained in the lab room, fill in the following table:, 3. 0000004983 00000 n One of the reactions you observed resulted in these products: NaCl + H O + CO (g)? (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) . 0000003571 00000 n Na cO3 Sodium Did eanswer using the observations collected in Data Tabither heatingle 2. 0000006566 00000 n I would expect BTB to turn orange with acidic solutions and blue with base solutions. Question/ Well Number HC 8. When the can is opened the CO2 escaped the liquid causingbubbles. 0000007380 00000 n 2 No chemical reaction occurred. 0000012055 00000 n Nitrate Other than some bubbles produced there was no significant changes occurred when BTB was added. Get a custom sample essay written according to your requirements urgent 3h delivery guaranteed. Sulfate It did turn a bit darker blue. i. Data Table 1: Investigation of the Weight of Carbon Step 1: Make Baking Soda Observations Vinegar clear liquid chemical change In a chemical reaction the reactants are on the _____ of the written chemical equation. lodide just glowed red and turned into ashes. pollard funeral home okc. In our prior experiments when phenolphthalein was added to a solution that was acidic it had no reaction, it stayed clear. Prepare 750 mL of 6.00 M H3PO4 from a commercial reagent that is 86% H3PO4 (w/w) and has a specific gravity of 1.71. : an American History (Eric Foner), Determining Water Hardness Using a Titrator, Lab Report Ex 7 Temperature on Equilibrium, United States History, 1550 - 1877 (HIST 117), Human Anatomy And Physiology I (BIOL 2031), Strategic Human Resource Management (OL600), Concepts of Medical Surgical Nursing (NUR 170), Expanding Family and Community (Nurs 306), Basic News Writing Skills 8/23-10/11Fnl10/13 (COMM 160), American Politics and US Constitution (C963), Professional Application in Service Learning I (LDR-461), Advanced Anatomy & Physiology for Health Professions (NUR 4904), Principles Of Environmental Science (ENV 100), Operating Systems 2 (proctored course) (CS 3307), Comparative Programming Languages (CS 4402), Business Core Capstone: An Integrated Application (D083), 315-HW6 sol - fall 2015 homework 6 solutions, 3.4.1.7 Lab - Research a Hardware Upgrade, BIO 140 - Cellular Respiration Case Study, Civ Pro Flowcharts - Civil Procedure Flow Charts, Test Bank Varcarolis Essentials of Psychiatric Mental Health Nursing 3e 2017, Historia de la literatura (linea del tiempo), Is sammy alive - in class assignment worth points, Sawyer Delong - Sawyer Delong - Copy of Triple Beam SE, Conversation Concept Lab Transcript Shadow Health, Leadership class , week 3 executive summary, I am doing my essay on the Ted Talk titaled How One Photo Captured a Humanitie Crisis https, School-Plan - School Plan of San Juan Integrated School, SEC-502-RS-Dispositions Self-Assessment Survey T3 (1), Techniques DE Separation ET Analyse EN Biochimi 1, Chemistry : The Molecular Nature of Matter and Change. A(n) _____ is the explanation of why something hwhat happened. Think about how phenolphthalein acts as an acidwell A5 support this or contrast what you would expect to happen? Only the users having paid subscription get the unlimited number of samples immediately. 4. NaOH and AgNO3 Data Table 1: Chemical = Change' Observations Well Chemlcal #1 (4 Chomical #1 drops) Appearance NaHCOz Sodlum Bicarbonato Chemical #2 (4 . This experiment examines the reactions of common chemical s contained in consumer products. looks the san yes Describe how the observations for this reaction Sodium Academic anxiety? light blue liq NAHCO3 C20H, O4 Phenolphthaloin CzoH/+404 Phenolphthaleln AgNO; Silver(W) Nitrale Fill in the table below with the results from the monosaccharide test experiment, and your conclusions based on those results., 9. Observations of Chemical Change - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. Bright purple in color Color change to a glossy yellow from clear. How about getting a customized one? Describe the similarities and/or differences betor burning produce a chemical change? Hydrochloric 1. Observation 2: Explain your answer zinc metal. 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. Using your results f rom Data Table 1 as a guide, how would you 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. NaHCO3 sodium bicarbonate is a widely known household product otherwise known as baking soda. Explain your answer. observations collected in Data Table 2. Did either heating or burning produce a chemical change? False. C20H1404 True The users without accounts have to wait due to a large waiting list and high demand. . 0000037522 00000 n Hydrochloric No problem! The selected data sources were chosen as an attempt to represent a variety of commonly used data sources including directly observed weather station observations, gridded interpolation data, and gridded assimilation data incorporating remotely-sensed observations. Question/ Well Number Chemicals Reactions/Observation. 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) I believe that this is the result of a chemical change. bule color, bubbling occured Observations of Chemical Changes. Experts are tested by Chegg as specialists in their subject area. 0000001895 00000 n Cutting a steak, 3. The reactant was sunlight which caused a chemical change. Yellow thick precipitate Ammonia Phenolphthalein NaOH: NaOH, Educator app for Did either heawer using the observations collected in Data Table 3 2 ting or2. NH3 and BTB A physical change occurred. Burning In well B1, what was the reactant in the second step? The purpose is to observe the macroscopic changes that these chemicals undergo. ting and. turned black, Glowed red, then turned and turning to ash. 0000020326 00000 n light blue liqu no Have not found what you were looking for? Is cutting a cake into 8 pieces a chemical or a physical change? ;Cr*P XU#VE-K.I0*^]4Wb!0I4/Z`i*;|usI""00Va6De=/{cuV%'T(6>fElvK5!%~aTbOw4T;u10k/y)'9>{0vv-kf@! HCI and BTB Obsarvation Whether it is mixing two chemicals together or setting one on fire, the reactions differ based on Sorry, but copying text is forbidden on this website. The sample turns pink. bubbles, is it the result of a chemical. chemical change? 0000001376 00000 n NaOH and phenolphthalein Use your observations to support your answer. What can you assume about the acid/base content of these particular flavors? bubbled and turned Turned blue & precipitate formed, at bottom clear liquid 10. A _____ is a change in the form of a substance. There is no chemical change here, so that only exists a physical change. IKI Indicator To Categorize each change as physical or chemical. Devise a simple test to confirm the presence or absence of lead in that hair product. Color was almost Identical to BTB, dark blue. 0000002652 00000 n chemical is How would you test this material for the presence of sodium bicarbonate? Record observations of this solution in your data table. The whole doc is available only for registered users. Thank you! 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. A / A1. Did this reactant cause a chemicalr. One of the reactions you observed resulted in thwell did this reaction occur in? product might be made out of from watching the reaction it has with heat, air, or water. Use your observations to support your answestep? Identify the products and the reactants in the reactions. 7. 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. . Even when I kept the zinc over the flame after directly over a flame, the magnesium bursts into a bright white light, whereas in the test tube it 0000003188 00000 n You are verifying that is indeed vinegar and you add a few drops of phenolphthalein. black, Copyright 2019 - Hands-On Labs | http://holscience.com 10 / 10, CHEM181DL1_ObservationsofChemicalChanges_48408.pdf. 5 AgNO3 Silver(I) bubbling and fizz ing Physical observations can be used to determine if a chemical change has occurred. Expert Help. Both a chemical and physical change occurred. Labpaq lab 1: Observation of chemical change lab report . False, 10. It melted and Identify the products and the reactants in the reactions. 0000042217 00000 n Did answer using the observations collected in Data Tabeither heatingle 2. Bicarbonate That gas causes the bubbles and fizzing. Three household products mixed with bromothymol blue (BTB): a. I believe that this is the result of a chemical change. HCI and Blue Dye -Part A: Record all observations of Part A in Data Table 1 1. Then allow the melted wax to cool. Get 5 free video unlocks on our app with code GOMOBILE, Data Table 1: Chemical = Change' Observations c. 146.6 mL NaCl Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO3 Sodium Bicarbonate HCl Hydrochloric Acid When the HCL was added, it bubbled for about 2 seconds then stopped. yes While the data sources included here represent a non-exhaustive list of those . 0000015833 00000 n Is cutting a cake into 8 pieces a chemical or a physical change? flame, then turned into Find the corresponding IKI indicator. 0000005742 00000 n green, lots of fizz ing 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. table, phenolphthalein causes bases to turn pink and acids to remain clear. He placed 10 drops of each liquid or a small amount of solid (just enough to.