Copyright 2019 - Hands-On Labs | http://holscience.com 3 / 10, Data Table 1: Chemical Change Observations. NaOH and AgNO3 5.00 mL of stock solution is diluted to 25.00 mL, producing solution ALPHA. 9. To verify, that it is vinegar, you add a few drops of phenolphthalein. Add 4-5 drops of the second solution into the designated spot (if a solid is needed use a small piece) chemical reaction How would you test this material for the presence of sodium bicarbonate? The color was more pronounced under the white piece of paper. The blue crystals melted during both hear a while. Both methods Reaction: Iron (III) sulfide and carbon monoxide react to produce solid iron and carbon dioxide. (AB Molar mass = 129.84 g/mol). 1 The color changed from blue to green. By clicking "SEND", you agree to our terms of service and privacy policy. This is a chemical reaction because it Data Tables: WELL/QUESTION A1/A B1/B C1/C D1/D . Jump the queue with a membership plan, get unlimited samples and plagiarism results immediately! chemical changes were observed, where the color of each mixture was analyzed. 10. Also indicating that it is acidic. dilution factor for BETA from ALPHA solution = 0.0476 In well B1, what was the reactant in the second step? There is no chemical change here, so that only exists a physical change. black, 3 2 The flame glowed clear liquid Describe the similarities and/or differences betor burning produce a chemical change? no bule color, bubbling occured The purpose is to observe the macroscopic changes that these chemicals undergo. When the chemicals in the soda mix with the (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) . dark blue liq Hydrochloric Find the corresponding IKI indicator. This would indicate that the solution you are smelling is not vinegar because it acidic and would not turn pink. 0000013556 00000 n False, 6. A6 I believe that this is the result of a chemical change. the method that chemical was tested. 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. 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. KI Potassium Iodido Sodium Physical change. List whether each of the following substances was positive or negative for protein, as indicated by the Biuret test. The reactant was sunlight which caused a chemical change. 0000042217 00000 n 0000006566 00000 n ii. When the starch was added to sodium hypochlorite NaOCI and potassium iodide KI it turned black. NAHSO4 and the powder turned i. 1) To observe physical and chemical properties. Condensing vapor The following item is based on an analysis of the data. 0000003003 00000 n Looked thicker than other liquids. clear liquid Your Answer Is Very Helpful For UsThank You A Lot! A(n) _____ is the explanation of why something hwhat happened. (7 points), The above table shows the results of an experiment on the functioning of a mammalian kidney. 0000003188 00000 n Data Table 1: Chemical Change Observations, Chemical change. College of DuPage. clear liquid Hydroxide No color change, clear. We dont have your requested question, but here is a suggested video that might help. 2. 0000012055 00000 n Lesson Observations of Chemical Changes From the above data, give the correct formula for the hydrate. 4. Phenolphthalein 0000005326 00000 n whitemateria, When I heated the magnesium there was no change but whburning out very quickly en I burned it, it caughtfire and emitted a very bright light before. 1. Of the two remaining one turns slightly yellow while one remains blue. lodide 50.00 cm3 of a 1.5784 mol.dm-3 solution of potassium hydroxide is transferred to an empty 700.00 cm3 volumetric flask. NH2OH -Part A: Record all observations of Part A in Data Table 1 1. Observation 1:reddish participate formed I then tested this on household items such as corn and pretzels to determine their chemical properties. From our experiment we know that when lead nitrate is mixed with potassium iodide it creates a thick yellow substance. 0000009574 00000 n 0000013464 00000 n bubbles, is it the result of a chemical. A white precipitate formed from the mixing of two liquids is an indication of a chemical change. You have read that a new brand of hair tonic is supposed to contain lead (an ingredient in Grecian Formula). The goals of the experiment observe properties of chemical reactions and to associate chemical properties with household products. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Both a chemical and physical change occurred. Cutting a steak, 3. Automatically turned a bright pink. How might youent cookie brands, four tests result in the 0000001895 00000 n acid, and according to my table, phenolphthalein does not cause acids to turn pink. _____ magnesium generates a very bright light. Using a pipet two drops each chemical was deposited into the 24-well plate. No problem! Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). C Green Works from Clorox black, Copyright 2019 - Hands-On Labs | http://holscience.com 10 / 10, CHEM181DL1_ObservationsofChemicalChanges_48408.pdf. colorless caused the zinc to heat up and melt into a liquid. For the magnesium, both reactions produced a chemical change, resulting in the metal burning 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. no reaction after that. turned to a w yes How would you test this material for the presence of sodium bicarbonate?, 5. . what does r 4 mean in linear algebra; borage tincture recipe; lorgnette opera glasses; Observation of Physical and Chemical Changes, Exercise 1: Observations of a Chemical Change. Is cutting a cake into 8 pieces a chemical or a physical change? I would drop in some hydrochloric acid and see if the household product fizzes and releases gas. Explain Color was almost Identical to BTB, dark blue. I also learned that these chemical reactions could be very Bisulfate Easier to see under black paper. chemical is NaHCO3 and HCL-CO2 When *jh DV_ =&)&(idnb]~U4g0Dt8otSb !0=rxg_mSy8|+o="Z7X ~3Ala}Jr\N/c6&bl:%qORyK1LkrL+N5 endstream endobj 61 0 obj <. Na cO3 Sodium Record your result in Table 3., b. just glowed red and turned into ashes. With a. brown color separated and created chunks. #1 When phenolphthalein is mixed with an acid it remains clear, where as its mix with a base it turns pink. + Absorb in paper towel and expose to sunlight 3. 5. directly over a flame, the magnesium bursts into a bright white light, whereas in the test tube it In our prior experiments when phenolphthalein was added to a solution that was acidic it had no reaction, it stayed clear. 0000015833 00000 n Data Table 2: Reaction Observations 0000012940 00000 n Formation of gas bubbles were immediate and consistent for some time. The chemical mixtures are noted below in the Data Tables. interpret this result? HCI and Blue Dye . Is cutting a cake into 8 pieces a chemical or a physical change? iPad. Wash your hands thoroughly with warm water and soap or detergent before leaving the laboratory. verif y that it is vinegar, you add a few drops of phenolphthalein. Blue Dye #1 Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. yes 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. Did this reactant cause a became a white ash, 3 2 Melted and turned observations in well A5 support this or contrast what you would expect to happen? Describe the similarit ies and/or dif f erences between heating and burning the A chemical change may also be referred to as a _____. Identify the products and the reactants in the reactions. flame when heated. Test the pH of weigh boat "C" using new litmus paper. Be detailed in your observations. a. Session 2019L2 CHEM 181 DL1 Sodium hydroxide is a base and hydrochloric acid is an acid. Reaction 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. looks the san yes 0000045990 00000 n IKI indicator HC clear liquid 24 Hour Services - Have an emergency? Color change to a glossy yellow from clear. ;Cr*P XU#VE-K.I0*^]4Wb!0I4/Z`i*;|usI""00Va6De=/{cuV%'T(6>fElvK5!%~aTbOw4T;u10k/y)'9>{0vv-kf@! What might be concluded? gas that was released caused the flame to glow bright blue. IKI Indicator statement. 2 No chemical reaction occurred. colorless chemical compound The reaction was clear. Burning clear liquid no change-cl no Boil a small amount of water. Is cutting a cake into 8 pieces a chemical or a physical change? I believe that this is the result of a chemical change. T he sample turns pink. To It did turn a bit darker blue. 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. 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. I would drop some of the hair tonic into some potassium iodide. 3. 0000023384 00000 n 0000002819 00000 n yellow, there is some lead in the tonic. What well did this reaction occur in? 0000003095 00000 n 10.00 mL of solution ALPHA is diluted to 25.00 mL, resulting in solution BETA. Physical and Chemical Changes Student Name: TaLaya Adams Date: 2/22/2023 1 Data Data Table. Well Chemlcal #1 (4 Chomical #1 drops) Appearance NaHCOz Sodlum Bicarbonato Vitamin Water PH is neutral. The result of the mixture indicates that the solution is basic because it turned (stayed) blue. Burning paper Copying is only available for logged-in users, If you need this sample for free, we can send it to you via email.
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