I would believe that the substance is actually sodium hydroxide. Blue Dye #1 HCI and BTB b. Windex, i. 9. 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. support your answer. (7 points), 1. ii. clear liquid You are verifying that is indeed vinegar and you add a few drops of phenolphthalein. Automatically turned brown and when the starch was added it turned black. Apple slices turning brown in the air. 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. High Fructose Corn Syrup: A Dangerous Chemical in Food, Interesting Observation of Two People at My Local McDonalds, Ethnographic Observation at Three Starbucks Locations, China Needs Immediate Action to Avoid Future Negative Climate Change, Upward Influence Tactics and Employee Role Change, The role of psychology in climate change debate, Resilience of Human Systems and Climate Change, A History of Racial Discrimination and the Fight for Change, Sexual Harassment: Google Needs to Establish a Sense of Urgency to Change. (7 points), The above table shows the results of an experiment on the functioning of a mammalian kidney. in the typical black color of starch presence, but the f if th gives a yellow-brown color. Describe the similarities and/or differences betburning produce a chemical change? While performing a starch test on several dif f erent cookie brands, f our tests result Use your Fill in the table below with the results from the monosaccharide test experiment, and your conclusions based on those results., 9. 1. That gas causes the bubbles and fizzing. Burning L /B5 0000037522 00000 n Yellow thick precipitate Log in Join. Instructor Lea Stage, CHEM 181 DL1 This is a chemical reaction because it This reaction occurred in A1 I believe. Colorless 3. Describe how the observations for this reaction support your answer. A white precipitate formed from the mixing of two liquids is an indication of a chemical change. Chloride NH3 and CuSO Copying is only available for logged-in users, If you need this sample for free, we can send it to you via email. Student NameStudent ID yumeng zhang 164162 Or if you need this sample for free, we can send it to you via email. T he sample turns pink. True 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. city of semmes public works. It did turn a bit darker blue. light blue liq Hydrochloric Three of the flavor-samples turn a murky green indicating thelikelihood of acid/base balance. Write the chemical equation for the reaction in well A6. From this, Observations of Chemical and Physical Changes. That was the only reaction that caused any type of fizzing 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. Explain your, From the experiment I just preformed I would say there iodide present, but no starch. Explain The sample turns pink what can you assume about his sample? 0000003003 00000 n 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 . Use your observations in Data Table 1 to describe a A metal is added to a liquid and bubbles form. Color was almost Identical to BTB, dark blue. Na cO3 Sodium and turning to ash. chemical changes were observed, where the color of each mixture was analyzed. When the starch was added to sodium hypochlorite NaOCI and potassium iodide KI it turned black. When a soda is poured into a glass and the soda change? answer. appened, and a(n) _____ is a description of, observation; conclusion 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. Chemical #2 (4 Chemical #2 drops) Appearanca HCI Hydrochloric Acid Ammonia Course Hero is not sponsored or endorsed by any college or university. Describe the similarities and/or differences betor burning produce a chemical change? The blue crystals melted during both hear a while. B4 NaHSO4 Explain your answer. 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. Academic anxiety? (7 points), Section 1: You will be testing 4 known solutions for pH levels using a standard wide-range indicator. SO2 + H2S ---> H2O + S, Drug A dissociates into four ions to the extent of 70%. 10.00 mL of solution BETA is then diluted to 25.00 mL, producing solution GAMMA. Starch: KI, 3. into a bright white Get the detailed answer: Name: Date: Exp 1: Observations of Chemical Changes Lab Section: Data Tables: Part 1: Chemicals Well No. Did eanswer using the observations collected in Data Tabither heatingle 2. cloudy clear liquid Observation Carbonate. Sorry, but copying text is forbidden on this website. Explain your answer. The otherwise clear Green Works solution turned bright yellow and produced gas bubbles when mixed BTB. Test the pH of weigh boat "C" using new litmus paper. From this Reactions/Observation. turned to a w yes This would indicate that it is acidic. of substances interact with one another to, 4. Hydrochloric 62.37 mL NaCl The chemical mixtures are noted below in the Data Tables. Cooking an egg KI Potassium Iodido 3. No color change, clear. . The reactant was sunlight which caused a chemical change. Appearance 0000004983 00000 n Explain your answer. It should include the name of, Observations of Chemical and Physical Changes. Sodium 5. 0000023384 00000 n One of the reactions you observed resulted in these products: NaCl + H O + CO (g)? The color was more pronounced under the white piece of paper. This flask is made up to the mark with distilled water and then shaken well. The heating and burning of Cu(NO ) was exactly the same, other than the addition of the glowing Start your trial now! clear liquid Automatically turned brown. Describe how the observations for this reaction black, 3 2 The flame glowed A1 NaHCO black, Copyright 2019 - Hands-On Labs | http://holscience.com 10 / 10, CHEM181DL1_ObservationsofChemicalChanges_48408.pdf. 2. clear liquid Observation of Physical and Chemical Changes, Exercise 1: Observations of a Chemical Change. After adding BTB the color automatically changed to a copper color. Describe the similarit ies and/or dif f erences between heating and burning the CuCO . Observations of the React LIMITED TIME OFFER: GET 20% OFF GRADE+ YEARLY SUBSCRIPTION . C1 abbvie patient assistance program Coal hypothesis = It activated carbon is added to a beaker with 100mL of water, then it will increase the pH over 48 hours., 1. How might you interpret this result? Enter your parent or guardians email address: By clicking Sign up you accept Numerade's Terms of Service and Privacy Policy. 5 bubbles, is it the result of a chemical. experiences in the experiment to describe these dif f erences. 1 The color changed from blue to green. flame, then turned into a. same side as the products Hydroxide 0000029863 00000 n Study Resources. We have received your request for getting a sample. white powder Baking muffin batter to make muffins Boiling water Clear no reaction. 4. Question/ Well Number Chemicals Reactions/Observation. boiled in the test tube, but did not burn or change in color. clear liquid You have read that a new brand of hair tonic is Grecian Formula ). Identify the products and the reactants in the reactions. no Add 4-5 drops of the second solution into the designated spot (if a solid is needed use a small piece) How would you test this material for the presence of sodium bicarbonate? Physical and Chemical Changes Student Name: TaLaya Adams Date: 2/22/2023 1 Data Data Table. Obsarvation 4. Find the corresponding IKI indicator. Experts are tested by Chegg as specialists in their subject area. 0000014765 00000 n 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. Nitrate 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. Do your Separates to edges leaving hole in the middle. How about getting a customized one? Even when I kept the zinc over the flame after 2. clear liquid 6. Well Chemlcal #1 (4 Chomical #1 drops) Appearance NaHCOz Sodlum Bicarbonato Label each substance on seven pieces . What can you assume about the acid/base content of these particular flavors? The result of the mixture indicates that the solution is basic because it turned (stayed) blue. Get original paper in 3 hours and nail the task . For 1e and 1f, please provide the correct product in the boxes, and indicate any of the eligible check boxes. dilution factor for BETA from ALPHA solution = 0.0476 Session 2019L2 CHEM 181 DL1 chemical compound We are really sorry but we cannot send the sample immediately. Exercise 1: Observations of a Chemical Change Data Table 1. answer using the observations collected in Data Table 2. 0000007380 00000 n Combustion occurred. + Absorb in paper towel and expose to sunlight Observation 2: No color change, Did this reactant cause a 9. Automatically turned a bright pink. You found a solution that has a faint odor resembling vinegar. Whether it is mixing two chemicals together or setting one on fire, the reactions differ based on C i. A6 60 0 obj <> endobj xref 60 54 0000000016 00000 n AgNO3 (aq) + NaOH (aq) ------> AgOH (s) + NaNO3 (aq). i. You have read that a new brand of hair tonic is supposed to contain lead (an 9. 10.00 mL of solution ALPHA is diluted to 25.00 mL, resulting in solution BETA. Wash your hands thoroughly with warm water and soap or detergent before leaving the laboratory. Nitrate Did either heating or burning produce a chemical change? HCI and Blue Dye One of the reactions you observed resulted in this product: NaCl + H, did this reaction occur in? the method that chemical was tested. In this experiment there were fourteen different chemicals of which were mixed with each other twelve different times and I observed there reactions. Identify an example of a chemical change. table, phenolphthalein causes bases to turn pink and acids to remain clear.