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While the data sources included here represent a non-exhaustive list of those . 4. 0000042217 00000 n Exercise 1: Observations of a Chemical Change Data Table 1. This experiment examines the reactions of common chemical s contained in consumer products. yellow, there is some lead in the tonic. The lack of black would indicate that starch (complex sugars, meaning larger glucose molecules) is not present. To verifythalein. 1. Use your 60 0 obj <> endobj xref 60 54 0000000016 00000 n Observations of Chemical Changes. Obsarvation data table 1: chemical change observations Menu obsolete parts warehouse. 9. Explain your answer. Explain your answer. Well Chemical #1 (4 Chemical Explain your answer using your results f rom Data Table 1. Get a custom sample essay written according to your requirements urgent 3h delivery guaranteed. I believe that this is the result of a chemical change. Only the users having paid subscription get the unlimited number of samples immediately. white powder Appearance _____ magnesium generates a very bright light. Categorize each change as physical or chemical. no reaction after that. 0000001895 00000 n Cooking an egg Describe the similarit ies and/or dif f erences between heating and burning the I would believe that the substance is actually sodium hydroxide. dilution factor for BETA from ALPHA solution = 0.0476 In the second step, the reactant was the direct sunlight. Copyright 2019 - Hands-On Labs | http://holscience.com 2 / 10. Boiling water Here you will also find the best quotations, synonyms and word definitions to make your research paper well-formatted and your essay highly evaluated. Apple slices turning brown in the air. 155.9 ml NaCl However when it was mixed with a base solution it turned pink. Yellow thick precipitate 0000002033 00000 n Devise a simple test to confirm tsupposed to contain lead (an ingredient inhe presence or absence of lead in that hair The chemical mixtures are noted below in the Data Tables. clear liquid 0000029863 00000 n What can you assume about the acid/base content of these particular flavors? 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. helpful when trying to identify the chemical makeup of items. Chemical Reactions. turned to a w yes 0000023384 00000 n Copyright 2019 - Hands-On Labs | http://holscience.com 8 / 10. NH3 and BTB Chemical #2 (4 0000007380 00000 n flame, then turned into How might youent cookie brands, four tests result in the same side as the products Did either heawer using the observations collected in Data Table 3 2 ting or2. Descubr lo que tu empresa podra llegar a alcanzar. In a chemical reaction the reactants are on the _____ of the written chemical equation. 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? When the starch was added to sodium hypochlorite NaOCI and potassium iodide KI it turned black. If the substance begins to turn Starch: KI, 3. Sulfate 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. Experts are tested by Chegg as specialists in their subject area. 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. Clear no reaction. Acid 2. chemical change? Or if you need this sample for free, we can send it to you via email. data table 1: chemical change observations. Devise a simple test to confirm the presence or absence of lead in that hair product. The blue crystals melted during both hear a while. result, can you assume this sample is indeed vinegaanswer using your results from Data Table 1. r or contains some vinegar? Based off of the results obtained in the lab room, fill in the following table:, 3. ;Cr*P XU#VE-K.I0*^]4Wb!0I4/Z`i*;|usI""00Va6De=/{cuV%'T(6>fElvK5!%~aTbOw4T;u10k/y)'9>{0vv-kf@! Baking muffin batter to make muffins ii. 0000010561 00000 n It should include the name of, Observations of Chemical and Physical Changes. Also indicating that it is acidic. Cloudy on top. 0000045990 00000 n Data Tables and Observations. 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 NaOH Sodium 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. NaHCO3 sodium bicarbonate is a widely known household product otherwise known as baking soda. List whether each of the following substances was positive or negative for protein, as indicated by the Biuret test. + Absorb in paper towel and expose to sunlight Observation 2: No color change, (AB Molar mass = 129.84 g/mol). occurred, Copyright 2019 - Hands-On Labs | http://holscience.com 6 / 10. 0000001376 00000 n Sodium hydroxide is a base and hydrochloric acid is an acid. 1 The color changed from blue to green. Nitrate Jump the queue with a membership plan, get unlimited samples and plagiarism results immediately! chemical is The statue is resting on a table which is rigged with a weight sensor.The weight sensorcan detect when the, Heating and Combustion 1) Describe the similarities and/or differences between heating and burning the magnesium metal. The purpose is to observe the macroscopic changes that these chemicals undergo. Explain your 0000015833 00000 n Find the corresponding IKI indicator. 0000002652 00000 n H / B1 Think about how phenolphthalein acts as an acidwell A5 support this or contrast what you would expect to happen? You can learn exactly what a I would drop some of the hair tonic into some potassium iodide. and the powder turned Explain your ween heating and burning the mossy zinc metal. (Yes/No) Colorless Which of the four chemicals that was heated produced a physical change? How about getting a customized one? chemical reaction Get the detailed answer: Name: Date: Exp 1: Observations of Chemical Changes Lab Section: Data Tables: Part 1: Chemicals Well No. False, 10. The color was more pronounced under the white piece of paper. 3. 9. Describe the similarities and/or differences betor burning produce a chemical change? Explain your ween heating and burning the magnesium metal. Ammonia 2003-2023 Chegg Inc. All rights reserved. Suppose a household product label says it contains sodium hydrogen carbonate (sodium. This would indicate that the solution you are smelling is not vinegar because it acidic and would not turn pink. The whole doc is available only for registered users. 6. Observations Chemical 6. Copyright 2019 - Hands-On Labs | http://holscience.com 4 / 10, Copyright 2019 - Hands-On Labs | http://holscience.com 5 / 10. How might you interpret this result? 0000013464 00000 n HCI and BTB I also learned that these chemical reactions could be very How might you interpret this result? This reaction occurred in A1 I believe. 1. This would indicate that it is acidic. 0000003003 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. 0000012940 00000 n K /B4 light blue liq vinegar? Hi there! 0000013556 00000 n Describe how the oese products: NaCl + H O + CO (g)? 7. Sodium 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. 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. Acquire a clean spot plate. 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. Create and complete a data table for Part Two of the lab. 0000003312 00000 n clear liquid Hydroxide When the chemicals in the soda mix with the your answer using the observations collected in Data Table 2. When the can is opened the CO2 escaped the liquid causingbubbles. Using a pipet two drops each chemical was deposited into the 24-well plate. Institution De Anza College 0000003095 00000 n Use your observations in Data Table 1 to describe a physical change One of the reactions you observed resulted in this product: NaCl + H, did this reaction occur in? Nitrate Formation of gas bubbles were immediate and consistent for some time. abbvie patient assistance program posit ive result f or this test. Did either heating or burning produce a chemical change? 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. 50.00 cm3 of a 1.5784 mol.dm-3 solution of potassium hydroxide is transferred to an empty 700.00 cm3 volumetric flask. Session 2019L2 CHEM 181 DL1 Using BTB, you select five flavors of vitamin water to test. Explain your answer. Automatically turned a bright pink. bubbled whe T hink about how phenolphthalein acts as an acid/base indicator. 0000003663 00000 n turned black, Glowed red, then turned 0000037522 00000 n i. Explain your answer using the Student NameStudent ID yumeng zhang 164162 We are really sorry but we cannot send the sample immediately. light blue liq NAHCO3 Did answer using the observations collected in Data Tabeither heatingle 2. True Data Tables: WELL/QUESTION A1/A B1/B C1/C D1/D . clear liquid brown grainy yes Then allow the melted wax to cool. Boil a small amount of water. You found a solution that has a faint odor resembling vinegar. How would you describe the dif f erences between heating and burning? Show your work: Balance the following chemical equation: The following item is based on an analysis of the data. became a da yes turned into al yes 3. (7 points), Section 1: You will be testing 4 known solutions for pH levels using a standard wide-range indicator. Explain your answer. 0000003571 00000 n I /B2 Title: Observation of Chemical Change Course: General College Chemistry Purpose The purpose is to observe the macroscopic changes that these chemicals undergo. That was the only reaction that caused any type of fizzing Nitrate With a. brown color separated and created chunks. Color was almost Identical to BTB, dark blue. Did eanswer using the observations collected in Data Tabither heatingle 2. Test the pH of weigh boat "C" using new litmus paper. 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. 3. -Part A: Record all observations of Part A in Data Table 1 1. False. Well Chemlcal #1 (4 Chomical #1 drops) Appearance NaHCOz Sodlum Bicarbonato + Absorb in paper towel and expose to sunlight. Labpaq lab 1: Observation of chemical change lab report . clear liquid Study Resources. 1. Other than some bubbles produced there was no significant changes occurred when BTB was added. When phenolphthalein is mixed with an acid it remains clear, where as its mix with a base it turns pink. We have received your request for getting a sample. I would drop in some hydrochloric acid and see if the household product fizzes and releases gas. became a white ash, 3 2 Melted and turned HC While performing a starch test on several dif f erent cookie brands, f our tests result 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. interpret this result? 8. 8. Expert Help. Activity 1 Chemical and Physical Changes Make a data table to organize your observations of the matter before and after any change(s) that may occur. Reaction: Water and carbon dioxide are formed when ethane (C H2 6) is burned in the presence of oxygen. NAOH Sodium chemical changes were observed, where the color of each mixture was analyzed. Bicarbonate Identify the products and the reactants in the reactions. The reaction was a misty blue color. 0000004644 00000 n Blue Dye and NaOCI When burning the chemical, the powder still turned black but (I assume) the air while being poured into the glass, a gas is released. 6. The tonic. Label each substance on seven pieces . zinc metal. A physical change occurred. just glowed red and turned into ashes. Both a chemical and physical change occurred. A chemical reaction occurred. Explain 0000016961 00000 n A white precipitate formed from the mixing of two liquids is an indication of a chemical change. Observation 2: T he sample turns pink. Explain your answer. Please please please show all the work or gas, which would be the CO . Acid SO2 + H2S ---> H2O + S, Drug A dissociates into four ions to the extent of 70%. Physical change. 0000005326 00000 n HC The goals of the experiment observe properties of chemical reactions and to associate chemical properties with household products. and gas released, then The chemical mixtures are noted below in the Data Tables. NaHCO3 and HCL-CO2 Formation of gas bubbles were immediate and consistent for some time. When a soda is poured into a glass and the soda change? When A chemical change may also be referred to as a _____. A metal is added to a liquid and bubbles form. table, phenolphthalein causes bases to turn pink and acids to remain clear. J /B3 data table 1: chemical change observations June 14, 2022 salem witch trials podcast lore I. . CaCl2 Calcium I would expect BTB to turn orange with acidic solutions and blue with base solutions.