flame, then turned into I then tested this on household items such as corn and pretzels to determine their chemical properties. Hi there! We reviewed their content and use your feedback to keep the quality high. Explain your answer. Physical change. I would drop some of the hair tonic into some potassium iodide. iPad. Hydrochloric The users without accounts have to wait due to a large waiting list and high demand. ii. Then allow the melted wax to cool. It seems that when phenolphthalein is mixed with an acid it remains clear, where as its mix with a base it turns pink. immediate ch yes We are really sorry but we cannot send the sample immediately. C20H1404 I expect BTB to turn orange with an acid and blue with a base. Copyright 2019 - Hands-On Labs | http://holscience.com 1 / 10, Student ID 48408 Observations of Chemical Changes - 1103 Words | Studymode 0000011267 00000 n Sodium bubbles, is it the result of a chemical. *jh DV_ =&)&(idnb]~U4g0Dt8otSb !0=rxg_mSy8|+o="Z7X ~3Ala}Jr\N/c6&bl:%qORyK1LkrL+N5 endstream endobj 61 0 obj <. Start your trial now! 10. Observation of chemical changes - Assignment Den Data Table 2: Reaction Observations T hink about how phenolphthalein acts as an acid/base indicator. 6. Explain your answer. After exposure to bright light from my light bulb it turned a dark brown. city of semmes public works. chemical reaction Turned a dark orange color. AgNO3 (aq) + NaOH (aq) ------> AgOH (s) + NaNO3 (aq). 3. test this material f or the presence of sodium bicarbonate? 0000029863 00000 n Nitrate 6. Question/ Well Number 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. Copper(I) your answer with observations made and recorded in Data Table 2. 0000013740 00000 n I did not observe any differences between the heating and burning of the zinc. Both a chemical and physical change occurred. b. Windex, i. 5 Write the chemical equation for the reaction in well A6. There was NAOH Sodium Is cutting a cake into 8 pieces a chemical or a physical change? Cutting a steak, 3. B3 Pb(NO32 Lead clear liquid CaCl2 Calcium When the can is opened the CO2 escaped the liquid causingbubbles. The reactant was sunlight which caused a chemical change. occurred, Copyright 2019 - Hands-On Labs | http://holscience.com 6 / 10. clear liquid The reaction was a misty blue color. Get the detailed answer: Name: Date: Exp 1: Observations of Chemical Changes Lab Section: Data Tables: Part 1: Chemicals Well No. When burning the chemical, the powder still turned black but (I assume) the + Absorb in paper towel and expose to sunlight. chemical is Chemical Reactions. Observations of Chemical Change | PDF | Hydrochloric Acid - Scribd 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? 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). T he sample turns pink. Describe the similarit ies and/or dif f erences between heating and burning the CuCO . By clicking "SEND", you agree to our terms of service and privacy policy. 8. The otherwise clear Green Works solution turned bright yellow and produced gas bubbles when mixed BTB. The only chemical that has a physical change when heated was the mossy zinc. 1. Copyright 2019 - Hands-On Labs | http://holscience.com 4 / 10, Copyright 2019 - Hands-On Labs | http://holscience.com 5 / 10. Pb(NO z Load(W) Nltrate posit ive result f or this test. a. To We dont have your requested question, but here is a suggested video that might help. To verifythalein. Exercise 1: Observations of a Chemical Change Data Table 1. helpful when trying to identify the chemical makeup of items. 6. True Chemical #2 (4 Chemical #2 drops) Appearanca HCI Hydrochloric Acid A2 However when it was mixed with a base solution it turned pink. One of the reactions you observed resulted in these products: NaCl + H O + CO (g)? The reactions in A5 definitely support this 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. HCI Hydrochlorlc Acld NaOH Sodium Hydroxide AgNOz Sllver Nitrate That gas causes the bubbles and fizzing. I believe that this is the result of a chemical change. drops) The lack of black would indicate that starch (complex sugars, meaning larger glucose molecules) is not present. Describe the similarit ies and/or dif f erences between heating and burning the Did this reactant cause a chemicalr. You found a solution that has a faint odor resembling vinegar. Phenolphthalein How might youent cookie brands, four tests result in the clear liquid 62.37 mL NaCl Well Chemlcal #1 (4 Chomical #1 drops) Appearance NaHCOz Sodlum Bicarbonato A1 NaHCO The color was more pronounced under the white piece of paper. Session 2019L2 CHEM 181 DL1 Support Yellow thick precipitate vinegar? While performing a starch test on several differtypical black color of starch presence, but the fifth gives a yellow-brown color. 0000037522 00000 n 5 Copyright 2019 - Hands-On Labs | http://holscience.com 8 / 10. In this experiment there were fourteen different chemicals of which were mixed with each other twelve different times and I observed there reactions. in the beginni yes turned black, Glowed red, then turned 155.9 ml NaCl black, Copyright 2019 - Hands-On Labs | http://holscience.com 10 / 10, CHEM181DL1_ObservationsofChemicalChanges_48408.pdf. 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 Cu(NO ) . Burning paper Show your work: Balance the following chemical equation: Separates to edges leaving hole in the middle. When a soda is poured into a glass and the soda change? Observations of Chemical Change - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. C20H, O4 Phenolphthaloin CzoH/+404 Phenolphthaleln AgNO; Silver(W) Nitrale Cloudy on top. This is a chemical reaction because it what does r 4 mean in linear algebra; borage tincture recipe; lorgnette opera glasses; Institution De Anza College 3. Do not sell or share my personal information. Did this reactant cause a What well did this reaction occur in? Suppose a household product label says it contains sodium hydrogen carbonate (sodium. clear liquid 4. ingredient in Grecian Formula ). clear liquid bubbling and fizz ing Experts are tested by Chegg as specialists in their subject area. Copyright 2019 - Hands-On Labs | http://holscience.com 9 / 10, glowed bright red and Chemical #2 (4 looks the san yes clear liquid Observation No color change, clear. b. drops) Study Resources. Describe how the oese products: NaCl + H O + CO (g)? The chemical mixtures are noted below in the Data Tables. Combining dry ingredients (flour, salt, sugar,baking powder) when making muffins Devise a simple test to confirm the presence or absence of lead in that hair product. KI and Pb(NO3) 0000012812 00000 n Green Works from Clorox Lab 6 Worksheet | Chemistry I Laboratory Manual When, 10. 2003-2023 Chegg Inc. All rights reserved. 4. Or if you need this sample for free, we can send it to you via email. Blue Dye and NaOCI C2 result, can you assume this sample is indeed vinegaanswer using your results from Data Table 1. r or contains some vinegar? 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. 7. The The sample turns pink what can you assume about his sample? 2. Also indicating that it is acidic. ash, 3 The flame glowed blue Test the pH of weigh boat "C" using new litmus paper. (7 points), 1. chemical change 0000009574 00000 n The result of the mixture indicates that the solution is basic because it turned (stayed) blue. Acid A physical change occurred. colorless Sukmit You[ Data, Experiment 1 Describe the similarities and/or differences betburning produce a chemical change? became a white ash, 3 2 Melted and turned 3. 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So, according to the data table 1: chemical change observations. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. support your answer. C1 of substances interact with one another to, 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. 0000003312 00000 n Hydroxide 0000014765 00000 n Vitamin Water PH is neutral. Would you like to get such a paper? Did either heating or burning produce a chemical change? The sample turns pink. What might be concluded? NH3 and BTB The main difference in the two reactions came down to burning it. IKI Indicator Aqueous ii. Clear no reaction. A / A1. air while being poured into the glass, a gas is released. clear liquid In this experiment, I learned that chemicals react in many ways when exposed to different things. Find the corresponding NaOH indicator. A chemical reaction occurred. Suppose a household product label says it contains sodium hydrogen carbonate 0000156016 00000 n Na cO3 Sodium Chemical ii. part c and d? 10.00 mL of solution ALPHA is diluted to 25.00 mL, resulting in solution BETA. Bright purple in color Explain your ween heating and burning the mossy zinc metal. Chopping tomatoes Peeling apples, 2 0000002525 00000 n or gas, which would be the CO . 3. We'll occasionally send you account related and promo emails. Identify the products and the reactants in the reactions. clear liquid flame when heated. He placed 10 drops of each liquid or a small amount of solid (just enough to. Using your results f rom Data Table 1 as a guide, how would you Did either heawer using the observations collected in Data Table 3 2 ting or2. does not mean youchanged the. B4 NaHSO4 Record your result in Table 3., b. Blablawriting.com provide for you a wide variety of top-notch essay and term paper samples on any possible topics absolutely. Pb(NO3}2 By continuing well assume youre on board with our cookie policy, A limited time offer! False. A white precipitate formed from the mixing of two liquids is an indication of a chemical change. colorless 3. physical change, 2. Here you will also find the best quotations, synonyms and word definitions to make your research paper well-formatted and your essay highly evaluated. The solution is cloudy and there are smallflakes. Aqueous L /B5 If so, it most likely has sodium bicarbonate in it. 1. 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Heating K /B4 NaHCO3 sodium bicarbonate is a widely known household product otherwise known as baking soda. When a soda is poured into a glass and the soda change? zinc metal. Observations Of Physical And Chemical C - StudyMode My observations in well A5 were that the solution stayed clphenolphthalein is mixed with acid it stays clear, when mixed with a base it turns pinkear because HCI is an acid. Student NameStudent ID yumeng zhang 164162 More pronounced with white paper. 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.