0000002819 00000 n The chemical mixtures are noted below in the Data Tables. That gas causes the bubbles and fizzing. I expect BTB to turn orange with an acid and blue with a base. Get a custom sample essay written according to your requirements urgent 3h delivery guaranteed. Devise a simple test to confirm the presence or absence of lead in that hair product. When the can is opened the CO2 escaped the liquid causingbubbles, 8. Institution De Anza College K /B4 0000010561 00000 n Using a pipet two drops each chemical was deposited into the 24-well plate. SO2 + H2S ---> H2O + S, Drug A dissociates into four ions to the extent of 70%. You are verifying that is indeed vinegar and you add a few drops of phenolphthalein. Did either heating or burning produce a chemical change? The main objectives . turned into al yes Physical and Chemical Changes Student Name: TaLaya Adams Date: 2/22/2023 1 Data Data Table. Sodium clear liquid Instructor Lea Stage, CHEM 181 DL1 does not mean youchanged the. drops) Using a pipet two drops each chemical was deposited into the 24-well plate. Did this reactant cause a chemicalr. HCI and phenolphthalein Experts are tested by Chegg as specialists in their subject area. bubbled whe d. Clementine Izzy material for the presence of sodium bicarbonate? Sodium If the substance begins to turn I got a very similar reaction while burning and heatingburning and turned a green color and turned black afte the Cu(NO3)2. Other than some bubbles produced there was no significant changes occurred when BTB was added. bubbling and fizz ing in the typical black color of starch presence, but the f if th gives a yellow-brown color. dilution factor for BETA from ALPHA solution = 0.0476 light blue liqu no white powder 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. Lesson Observations of Chemical Changes B2 NH4OH A _____ is a change in the form of a substance. I would drop some of the hair tonic into some potassium iodide. Explain your ween heating and burning the mossy zinc metal. NaOH Sodium We have received your request for getting a sample. clear liquid vinegar? Explain your AgNO3 Silver(I) clear liquid Explain your ansween heating and burning the Cu(NO ). A physical change occurred. Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. The heating and burning of Cu(NO ) was exactly the same, other than the addition of the glowing Obsarvation Heating 8. chemical compound Instructor James Maxwell. Condensing vapor 1. Acquire a clean spot plate. 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. or gas, which would be the CO . ;Cr*P XU#VE-K.I0*^]4Wb!0I4/Z`i*;|usI""00Va6De=/{cuV%'T(6>fElvK5!%~aTbOw4T;u10k/y)'9>{0vv-kf@! You have read that a new brand of hair tonic is supposed to contain lead (an ingredient in Grecian Formula). Your Answer Is Very Helpful For UsThank You A Lot! %PDF-1.6 % Describe the similarities and/or differences betor burning produce a chemical change? 0000003095 00000 n From this result, can you assume this sample is indeed vinegar or contains some 0000004304 00000 n of substances interact with one another to, 4. Suppose a household product label says it contains sodium carbonate (sodium bicarbonate). When a soda is poured into a glass and the soda change? This would indicate that it is acidic. HCI and Blue Dye Copyright 2019 - Hands-On Labs | http://holscience.com 1 / 10, Student ID 48408 He placed 10 drops of each liquid or a small amount of solid (just enough to. Copyright 2019 - Hands-On Labs | http://holscience.com 9 / 10, glowed bright red and Lead() Nitrate iPad. (7 points), 1. Suppose a household product label says it contains sodium hydrogen carbonate (sodium. Chopping tomatoes Peeling apples, 2 After exposure to bright light from my light bulb it turned a dark brown. 5 Burning paper clear liquid Observation Describe how the oese products: NaCl + H O + CO (g)? helpful when trying to identify the chemical makeup of items. table, phenolphthalein causes bases to turn pink and acids to remain clear. + Absorb in paper towel and expose to sunlight. 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. Color change to a glossy yellow from clear. The goals of the experiment observe properties of chemical reactions and to associate chemical properties with household products. C20H, O4 Phenolphthaloin CzoH/+404 Phenolphthaleln AgNO; Silver(W) Nitrale Copyright 2019 - Hands-On Labs | http://holscience.com 2 / 10. 6. 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). In the second step, the reactant was the direct sunlight. NAHSO4 + Absorb in paper towel and expose to sunlight 0000013556 00000 n physical change, 2. 0000009027 00000 n From our experiment we know that when lead nitrate is mixed with potassium iodide it creates a thick yellow substance. Get access to our huge, continuously updated knowledge base. There is no chemical change here, so that only exists a physical change. ii. 60 0 obj <> endobj xref 60 54 0000000016 00000 n C2 0000005326 00000 n i. Chemical #2 (4 The result of the mixture indicates that the solution is basic because it turned (stayed) blue. Sorry, but copying text is forbidden on this website. How about getting a customized one? Bisulfate What might be concluded? Identify an example of a chemical change. clear liquid 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! After adding BTB the color automatically changed to a copper color. From this, Observations of Chemical and Physical Changes. How would you test this material for the presence of sodium bicarbonate?, 5. For the magnesium, both reactions produced a chemical change, resulting in the metal burning Is cutting a cake into 8 pieces a chemical or a physical change? Observations of Chemical Changes. 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. Chloride Blablawriting.com provide for you a wide variety of top-notch essay and term paper samples on any possible topics absolutely. 4. 50.00 cm3 of a 1.5784 mol.dm-3 solution of potassium hydroxide is transferred to an empty 700.00 cm3 volumetric flask. 1. In this experiment, I learned that chemicals react in many ways when exposed to different things. NH3 and BTB Aqueous Coal hypothesis = It activated carbon is added to a beaker with 100mL of water, then it will increase the pH over 48 hours., 1. Automatically turned a dark green. 3. Sodium hydroxide is a base and hydrochloric acid is an acid. . Color change from clear to bright pink. Data Table 1 0000006566 00000 n False, 6. part c and d? Chemical Change E (YiN) Use your observations to support your answestep? It melted and J /B3 0000002525 00000 n clear liquid 2. Did either heating or burning produce a chemical change? Only the users having paid subscription get the unlimited number of samples immediately. Three of the flavor-samples turn a murky green indicating thelikelihood of acid/base balance. Copyright 2019 - Hands-On Labs | http://holscience.com 8 / 10. ash, 3 The flame glowed blue The main difference in the two reactions came down to burning it. Chemical #2 (4 Chemical #2 drops) Appearanca HCI Hydrochloric Acid The reactant was sunlight which caused a chemical change. What well did this reaction occur in? The solution is cloudy and there are smallflakes. _____ magnesium generates a very bright light. turned the color of dark brown similar to rust on the paper towel. List whether each of the following substances was positive or negative for protein, as indicated by the Biuret test. The reactions in A5 definitely support this Describe the similarit ies and/or dif f erences between heating and burning the 0000016961 00000 n The goals of the experiment observe properties of chemical reactions and to associate chemical properties with household products. 4. clear liquid immediately t yes 0000045990 00000 n and turning to ash. 0000007380 00000 n Hydroxide The sample turns pink. We reviewed their content and use your feedback to keep the quality high. The reactants and products are clear. Jump the queue with a membership plan, get unlimited samples and plagiarism results immediately! clear liquid 6. 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. Is cutting a cake into 8 pieces a chemical or a physical change? 0000013648 00000 n MW of Drug A= 892.54 (assume final volume will be qs with sterile water for injection) Sodium 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. Apple slices turning brown in the air. Cooking an egg Phenolphthalein I did not observe any differences between the heating and burning of the zinc. True 0000003663 00000 n 1. Vitamin Water PH is neutral. Sulfate appened, and a(n) _____ is a description of, observation; conclusion Chemical In a chemical reaction the reactants are on the _____ of the written chemical equation. Chemical: Change', 2. #1 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 . One of the reactions you observed resulted in thwell did this reaction occur in? The result of mixing the chemicals sodium hypochlorite NaOCI and potassium iodide KI created a yellow brown substance, when starch was added it created the dark black color. Add 4 -5 drops of the first solution into the designated spot. I would drop in some hydrochloric acid and see if the household product fizzes and releases gas. Automatically turned brown. Explain your answer. From this 0000013371 00000 n 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 Identify whether each statement is an observation or a conclusion. If not it is safe to say that there is no lead in the product. When phenolphthalein is mixed with an acid it remains clear, where as its mix with a base it turns pink. Cu(NO ) . 1) To observe physical and chemical properties. CuSO4 IKI indicator The lack of black would indicate that starch (complex sugars, meaning larger glucose molecules) is not present. Ammonia turned black, Glowed red, then turned B3 Pb(NO32 Lead clear liquid CaCl2 Calcium From the above data, give the correct formula for the hydrate. same side as the products Did either heawer using the observations collected in Data Table 3 2 ting or2. 0000008196 00000 n A6 In well B1, what was the reactant in the second step? 1 The color changed from blue to green. Nitrate it is a red/bn Starch There was 0000020326 00000 n A chemical reaction is a process where the atomsform new substances. Burning Title: Observation of Chemical Change Course: General College Chemistry Purpose The purpose is to observe the macroscopic changes that these chemicals undergo. Na cO3 Sodium 10.00 mL of solution ALPHA is diluted to 25.00 mL, resulting in solution BETA. C20H1404 Based off of the results obtained in the lab room, fill in the following table:, 3. Data Table 1: Chemical = Change' Observations Well Chemlcal #1 (4 Chomical #1 drops) Appearance NaHCOz Sodlum Bicarbonato Chemical #2 (4 . 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 reaction was a misty blue color. light blue liq 3. acid, and according to my table, phenolphthalein does not cause acids to turn pink. Student NameStudent ID yumeng zhang 164162 A(n) _____ is the explanation of why something hwhat happened. (AB Molar mass = 129.84 g/mol). This would indicate that the solution you are smelling is not vinegar because it acidic and would not turn pink. 0000009972 00000 n Or if you need this sample for free, we can send it to you via email. turned to a w yes 2003-2023 Chegg Inc. All rights reserved. Bisulfate Call us now: 012 662 0227 what happened to yourpalross. 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. I would believe that the substance is actually sodium hydroxide. So, according to the 10.00 mL of solution BETA is then diluted to 25.00 mL, producing solution GAMMA. 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? 7. Show your work: Balance the following chemical equation: Lesson Observations of Chemical Changes 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. Explain your answer using your results f rom Data Table 1. clear liquid melting, no type of chemical reaction occurred. 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) 0000003848 00000 n c. Apple Jucie. 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. Chemical reactions and color changes were recorded in Data Table 1. 5. colorless NH2OH left side, 5. 0000003188 00000 n Chloride Reaction: Water and carbon dioxide are formed when ethane (C H2 6) is burned in the presence of oxygen. I would assume that the fifth cookie does not have as much starch as the other cookies. Cooking tomatoes to make tomato sauce For 1e and 1f, please provide the correct product in the boxes, and indicate any of the eligible check boxes. The following item is based on an analysis of the data. A1 NaHCO Reaction 1. change? B, clear to straw yellow color d. 218.33 mL NaCl. How would you test this material for the presence of sodium bicarbonate? It seems that when phenolphthalein is mixed with an acid it remains clear, where as its mix with a base it turns pink. The color was more pronounced under the white piece of paper. The otherwise clear Green Works solution turned bright yellow and produced gas bubbles when mixed BTB. You could mix the product with lead nitrate and if it change it doesnt change it does not contain lead turns a yellow color it containslead, if it doesnt. green, lots of fizz ing boiled in the test tube, but did not burn or change in color. Institution Ocean County College Use your This is a chemical reaction because it clear liquid brown grainy yes Explain your answer using the Hi there! Bicarbonate 6. The purpose of this experiment is for the student to gain knowledge and experience regarding how avariety of chemicals react to one another. A chemical reaction occurred. Use your observations in Data Table 1 to describe a Phenolphthalein A / A1. chemical change? When the chemicals in the soda mix with the clear liquid 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. False, 10. 0000020789 00000 n 0000012055 00000 n That was the only reaction that caused any type of fizzing