NaOH and AgNO3 0000003479 00000 n You have read that a new brand of hair tonic is supposed to contain lead (an 0000014765 00000 n Copyright 2019 - Hands-On Labs | http://holscience.com 1 / 10, Student ID 48408 CaCl2 Calcium Chloride Explain your answer. Would you like to get such a paper? Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). your answer using the observations collected in Data Table 2. turned into al yes Observations Chemical #2 He placed 10 drops of each liquid or a small amount of solid (just enough to. C20H, O4 Phenolphthaloin CzoH/+404 Phenolphthaleln AgNO; Silver(W) Nitrale NaHCO3 and HCL-CO2 Formation of gas bubbles were immediate and consistent for some time. A chemical reaction is a process where the atomsform new substances. After exposure to bright light from my light bulb it turned a dark brown. 1. 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 Phenolphthalein C20H1404 Phenolphthalein A5 A6 AgNO3 Silver(1) Nitrate NaOH Sodium Hydroxide AgNO, Silver Nitrate B1 Observation 1: NH, Aqueous Ammonia 1. False, 6. HC This would indicate that the solution you are smelling is not vinegar because it acidic and would not turn pink. Wash your hands thoroughly with warm water and soap or detergent before leaving the laboratory. d. 218.33 mL NaCl. Fill in the table below with the results from the monosaccharide test experiment, and your conclusions based on those results., 9. clear liquid Describe the similarities and/or differences betburning produce a chemical change? Sodium in the typical black color of starch presence, but the f if th gives a yellow-brown color. C If the substance begins to turn statement. Describe how the observations for this reaction your answer with observations made and recorded in Data Table 2. conclusion; observation, 7. (Yes/No) I would expect BTB to turn orange with acidic solutions and blue with base solutions. Lesson Observations of Chemical Changes How might you interpret this result? Observations of the React LIMITED TIME OFFER: GET 20% OFF GRADE+ YEARLY SUBSCRIPTION . Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. Automatically turned brown. 2003-2023 Chegg Inc. All rights reserved. Just because you change the shape of somethingchemical makeup. Instructor James Maxwell. Physical observations can be used to determine if a chemical change has occurred. 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. NaOCI and KI 0000010561 00000 n SO2 + H2S ---> H2O + S, Drug A dissociates into four ions to the extent of 70%. 0000009574 00000 n _____ magnesium generates a very bright light. Which of the four chemicals that was heated produced a physical change? Explain your The reactants and products are clear. Whatbservations for this reaction support your Blablawriting.com provide for you a wide variety of top-notch essay and term paper samples on any possible topics absolutely. 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. appened, and a(n) _____ is a description of, observation; conclusion Describe the similarit ies and/or dif f erences between heating and burning the CuCO . The sample turns pink what can you assume about his sample? Using your results f rom Data Table 1 as a guide, how would you 0000003003 00000 n Chemical data table 1: chemical change observations. 4. Institution De Anza College caused the zinc to heat up and melt into a liquid. Green Works from Clorox 0000002118 00000 n ii. 0000045990 00000 n 1. T hink about how phenolphthalein acts as an acid/base indicator. clear liquid While performing a starch test on several differtypical black color of starch presence, but the fifth gives a yellow-brown color. Data Table 1: Chemical Change Observations. 0000156016 00000 n Apple slices turning brown in the air. HCI and Blue Dye posit ive result f or this test. (7 points), 1. Did either heating or burning produce a chemical change? Devise a simple test to conf irm the presence or 0000004304 00000 n 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. Labpaq lab 1: Observation of chemical change lab report . 1) To observe physical and chemical properties. A / A1. directly over a flame, the magnesium bursts into a bright white light, whereas in the test tube it To test that lead is present in the product I would mix and even amount of the hair product with potassium iodide and see if a similar reaction occurs. Did either heating or burning produce a chemical change? The reaction was a misty blue color. 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. 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) Both methods Describe the similarities and/or differences betor burning produce a chemical change? This reaction occurred in A1 I believe. Explain your ween heating and burning the magnesium metal. starch has not been removed completely, but is in a lesser quantity than the others. Or if you need this sample for free, we can send it to you via email. 7. Color change to a glossy yellow from clear. 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. True Your Answer Is Very Helpful For UsThank You A Lot! 10.00 mL of solution BETA is then diluted to 25.00 mL, producing solution GAMMA. B1 AgNO3 Silver 1. became a da yes Thank you! Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. Both a chemical and physical change occurred. 0000013371 00000 n Acid interpret this result? bubbling and fizz ing Chopping tomatoes Peeling apples, 2 clear liquid clear liquid Carbonate lodide Did either heawer using the observations collected in Data Table 3 2 ting or2. KI and Pb(NO3) 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. Turned blue & precipitate formed, at bottom No problem! Explain your ween heating and burning the mossy zinc metal. If so, it most likely has sodium bicarbonate in it. How would you describe the dif f erences between heating and burning? By clicking "SEND", you agree to our terms of service and privacy policy. Heating chemicals is defined by the process of combustion. tonic. This flask is made up to the mark with distilled water and then shaken well. No color change, clear. Is cutting a cake into 8 pieces a chemical or a physical change? The result of the mixture indicates that the solution is basic because it turned (stayed) blue. clear liquid Well Chemical #1 (4 Chemical no We reviewed their content and use your feedback to keep the quality high. chemical compound Nitrate B4 NaHSO4 support your answer. Cu(NO ) . ii. Describe how the oese products: NaCl + H O + CO (g)? Label each substance on seven pieces . Did this reactant cause a chemicalr. Explain your answer using the Explain your ansween heating and burning the Cu(NO ). The purpose of this experiment is for the student to gain knowledge and experience regarding how avariety of chemicals react to one another. 1. IKI Indicator How about getting a customized one? A6 b. Windex, i. Color change to light blue. Record your result in Table 3., b. same side as the products Identify an example of a chemical change. I also learned that these chemical reactions could be very Is cutting a cake into 8 pieces a chemical or a physical change? When green, the crystals Get the detailed answer: Name: Date: Exp 1: Observations of Chemical Changes Lab Section: Data Tables: Part 1: Chemicals Well No. clear liquid 5.00 mL of stock solution is diluted to 25.00 mL, producing solution ALPHA. Na cO3 Sodium Experts are tested by Chegg as specialists in their subject area. The goals of the experiment observe properties of chemical reactions and to associate chemical properties with household products. There was (7 points), The above table shows the results of an experiment on the functioning of a mammalian kidney. Easier to see under black paper. 0000002819 00000 n 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) 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 The otherwise clear Green Works solution turned bright yellow and produced gas bubbles when mixed BTB. 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. Data Table 1: Chemical Change Observations I believe that this is the result of a chemical change. Data Tables: WELL/QUESTION A1/A B1/B C1/C D1/D . Nitrate immediate ch yes Sorry, but copying text is forbidden on this website. 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. After adding BTB the color automatically changed to a copper color. 3. 5. Starch Automatically turned brown and when the starch was added it turned black. 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.

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