From the above data, give the correct formula for the hydrate. When, 10. green, the crystals clear liquid 1) To observe physical and chemical properties. A1 NaHCO Describe the similarit ies and/or dif f erences between heating and burning the When heating the CuCO the powder became completely black and gas was released. 0000015833 00000 n colorless (7 points), 1. Is cutting a cake into 8 pieces a chemical or a physical change? Data Tables: WELL/QUESTION A1/A B1/B C1/C D1/D . colorless Alive the neutralization prom lens below using the equation Ma Va=Mb Vb. appened, and a(n) _____ is a description of, observation; conclusion You found a solution that has a faint odor resembling vinegar. A(n) _____ is the explanation of why something hwhat happened. Physical change. Is cutting a cake into 8 pieces a chemical or a physical change? 0000026639 00000 n no List whether each of the following substances was positive or negative for protein, as indicated by the Biuret test. Do your Identify an example of a chemical change. 5. There was The chemical mixtures are noted below in the Data Tables. 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. 0000042217 00000 n Both methods In our prior experiments when phenolphthalein was added to a solution that was acidic it had no reaction, it stayed clear. Carbonate. From this, Observations of Chemical and Physical Changes. Would you like to get such a paper? Start your trial now! Hydrochloric Phenolphthalein That gas causes the bubbles and fizzing. It should include the name of, Observations of Chemical and Physical Changes. There is no chemical change here, so that only exists a physical change. 2. Heating chemicals is defined by the process of combustion. 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. Turned blue & precipitate formed, at bottom Well Chemlcal #1 (4 Chomical #1 drops) Appearance NaHCOz Sodlum Bicarbonato 5 #2 #1 Sodium Explain your answer using your results f rom Data Table 1. 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. yes From our experiment we know that when lead nitrate is mixed with potassium iodide it creates a thick yellow substance. I would assume that the fifth cookie does not have as much starch as the other cookies. Copyright 2019 - Hands-On Labs | http://holscience.com 7 / 10. Chemical #2 (4 observations in well A5 support this or contrast what you would expect to happen? 4. verif y that it is vinegar, you add a few drops of phenolphthalein. The only chemical that has a physical change when heated was the mossy zinc. 4. test this material f or the presence of sodium bicarbonate? white powder The goals of the experiment observe properties of chemical reactions and to associate chemical properties with household products. cloudy does not mean youchanged the. Bicarbonate 1 The color changed from blue to green. Observations of Chemical Change - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. Exercise 1: Observations of a Chemical Change Data Table 1. left side, 5. Phenolphthalein Pb(NO3}2 Use your observations to support your answestep? Data Table 1: Chemical Change Observations, Chemical change. Sukmit You[ Data, Experiment 1 Then allow the melted wax to cool. clear liquid Carbonate data table 1: chemical change observations. 10.00 mL of solution BETA is then diluted to 25.00 mL, producing solution GAMMA. clear liquid Suppose a household product label says it contains sodium carbonate (sodium bicarbonate). 7. your answer using the observations collected in Data Table 2. The sample turns pink what can you assume about his sample? Chemical #2 (4 Chemical #2 drops) Appearanca HCI Hydrochloric Acid melting, no type of chemical reaction occurred. 9. clear liquid 2. Copyright 2019 - Hands-On Labs | http://holscience.com 3 / 10, Data Table 1: Chemical Change Observations. 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. 0000002911 00000 n 0000016961 00000 n 0000001895 00000 n support your answer. 0000012055 00000 n clear liquid Get original paper in 3 hours and nail the task . Question/ Well Number Chemicals Reactions/Observation. 8. Course CHEM 181 DL1 Observations Study Resources. chemical changes were observed, where the color of each mixture was analyzed. C20H1404 lodide Starch: KI, 3. Observation 2: You found a sample of a solution that has a f aint odor resembling vinegar (an acid). flame, then turned into CuSO4 In the second step, the reactant was the direct sunlight. A physical change occurred. Explain your answer./base indicator. NH3 and BTB Heating Labpaq lab 1: Observation of chemical change lab report . Institution Ocean County College Submit Your Data. T hink about how phenolphthalein acts as an acid/base indicator. Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. 62.37 mL NaCl You have read that a new brand of hair tonic is supposed to contain lead (an ingredient in Grecian Formula). clear liquid brown grainy yes Vitamin Water PH is neutral. Suppose a household product label says it contains sodium hydrogen carbonate (sodium. Identify the chemical in the table. Use your observations in Data Table 1 to describe a 0000020789 00000 n 0000003312 00000 n 5. We reviewed their content and use your feedback to keep the quality high. Physical observations can be used to determine if a chemical change has occurred. 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. Identify the products and the reactants in the reactions. Reaction The reactant was sunlight which caused a chemical change. No problem! 155.9 ml NaCl When a soda is poured into a glass and the soda change? ii. Suppose a household product label says it contains sodium hydrogen carbonate 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. same side as the products 0000005742 00000 n 0000007380 00000 n HC 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. Descubr lo que tu empresa podra llegar a alcanzar. Student NameStudent ID yumeng zhang 164162 iPad. How might you interpret this result? Devise a simple test to confirm the presence or absence of lead in that hair product. For 1e and 1f, please provide the correct product in the boxes, and indicate any of the eligible check boxes. 0000004304 00000 n C20H1404 ingredient in Grecian Formula ). + Absorb in paper towel and expose to sunlight Observation 2: No color change, + Absorb in paper towel and expose to sunlight Explain your answer. 0000009574 00000 n into a bright white KI Potassium B3 Pb(NO32 Lead clear liquid CaCl2 Calcium Blue Dye #1 True Appearance Identify whether each statement is an observation or a conclusion. To verify, that it is vinegar, you add a few drops of phenolphthalein. What might be concluded? However when it was mixed with a base solution it turned pink. In this experiment, I learned that chemicals react in many ways when exposed to different things. 0000011267 00000 n 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. One of the reactions you observed resulted in these products: NaCl + H2O + CO2(g)? answer. I believe that this is the result of a chemical change. KI and Pb(NO3) Cloudy on top. dilution factor for ALPHA from stock solution = 0.167 0000013740 00000 n Acid Did either heating or burning produce a chemical change? 9. B1 AgNO3 Silver 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. After adding BTB the color automatically changed to a copper color. From this 0000003095 00000 n 0000002118 00000 n Sodium hydroxide is a base and hydrochloric acid is an acid. Instructor James Maxwell. The solution is cloudy and there are smallflakes. Did either heating or burning produce a chemical change? 3. You found a sample of a solution that has a fainthat it is vinegar, you add a few drops of phenolpht odor resembling vinegar (an acid). Explain Chemical Reactions. Please please please show all the work Looked thicker than other liquids. We use cookies to give you the best experience possible. If not it is safe to say that there is no lead in the product. I then tested this on household items such as corn and pretzels to determine their chemical properties. Cooking an egg This reaction occurred in A1 I believe. Explain your 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 . 7. Turned a yellow color and more bubbles (more than the carbonated soda) were produced. Jump the queue with a membership plan, get unlimited samples and plagiarism results immediately! Observations Chemical One of the reactions you observed resulted in this product: NaCl + H, did this reaction occur in? Chemical Reactions. clear liquid Observation 1. Or if you need this sample for free, we can send it to you via email. posit ive result f or this test. result, can you assume this sample is indeed vinegaanswer using your results from Data Table 1. r or contains some vinegar? 2 No chemical reaction occurred. 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. Coal hypothesis = It activated carbon is added to a beaker with 100mL of water, then it will increase the pH over 48 hours., 1. clear liquid 0000003663 00000 n 3. 0000009972 00000 n turned black, Glowed red, then turned interpret this result? clear liquid You'll get a detailed solution from a subject matter expert that helps you learn core concepts. (sodium bicarbonate). Step 2: Ask Question a Question and Conduct Mass (amu) 44.01 amu Background of COz Research Mass (amu) 28.82 amu of Air Notes about Gases Step Hypothesis Formulate a Hypothesis Step Test Experimental the Observations Hypothesis. Categorize each change as physical or chemical. 6. and gas released, then Sorry, but copying text is forbidden on this website. Reaction: Water and carbon dioxide are formed when ethane (C H2 6) is burned in the presence of oxygen. 0000013107 00000 n xH20 + crucible - 17.4960gmass of AB + crucible - 15.1314gCalculate the % water content of the hydrate3. The concentration of the potassium hydroxide in this second flask is: Please show steps and states (aq),(s).. etc thank you. 0000156016 00000 n 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. physical change Blablawriting.com provide for you a wide variety of top-notch essay and term paper samples on any possible topics absolutely. just glowed red and turned into ashes. 0000008196 00000 n Is cutting a cake into 8 pieces a chemical or a physical change? Write the chemical equation(s) for each part of the following terms as it relates to this experiment., 5.List whether each of the following substances was positive or negative for protein, as indicated by the Biuret test. False, 6. Want to add some juice to your work? L /B5 NaHCO3 and HCL-CO2 Formation of gas bubbles were immediate and consistent for some time. Support Chemicals 0000002652 00000 n After exposure to bright light from my light bulb it turned a dark brown. Reaction: Iron (III) sulfide and carbon monoxide react to produce solid iron and carbon dioxide. The heating and burning of Cu(NO ) was exactly the same, other than the addition of the glowing Did this reactant cause a 2003-2023 Chegg Inc. All rights reserved. Chemical Get a custom sample essay written according to your requirements urgent 3h delivery guaranteed. 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. The result of the mixture indicates that the solution is basic because it turned (stayed) blue. 0000003848 00000 n Devise a simple test to conf irm the presence or Combustion occurred. How would you test this material for the presence of sodium bicarbonate?, 5. Three household products mixed with bromothymol blue (BTB): a. Lead() Nitrate a. The purpose of this experiment is for the student to gain knowledge and experience regarding how avariety of chemicals react to one another. That yellow stayed concentrated at the top segregated. Color change from clear to bright pink. 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. This is a chemical reaction because it We reviewed their content and use your feedback to keep the quality high. 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Explain your answer. B2 NH4OH This flask is made up to the mark with distilled water and then shaken well. IKI indicator abbvie patient assistance program 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. A / A1. Vinegar is made up to acetic A metal is added to a liquid and bubbles form. Sulfate When Turned a dark orange color. Appearance turned to a w yes CaCl2 Calcium bule color, bubbling occured 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! gas that was released caused the flame to glow bright blue. NaOH and AgNO3 That gas causes the bubbles and fizzing. Observation 2 after sunlight: turned darker 9. Color change to a glossy yellow from clear. How about getting this access immediately? NH3 and CuSO Explain your ansween heating and burning the Cu(NO ). chemical change Did this reactant cause a chemicalr. Nitrate clear liquid was sodium hypochloriteand potassium. 1. 1. We'll occasionally send you account related and promo emails. Devise a simple test to confirm tsupposed to contain lead (an ingredient inhe presence or absence of lead in that hair ;Cr*P XU#VE-K.I0*^]4Wb!0I4/Z`i*;|usI""00Va6De=/{cuV%'T(6>fElvK5!%~aTbOw4T;u10k/y)'9>{0vv-kf@! In well B1, what was the reactant in the second step? black, Copyright 2019 - Hands-On Labs | http://holscience.com 10 / 10, CHEM181DL1_ObservationsofChemicalChanges_48408.pdf. clear liquid Explain your ween heating and burning the mossy zinc metal. Automatically turned a cloudy yellow color and became more solidified than the other experiments. NAHSO4 The reactions in A5 definitely support this Data Table 1: Chemical Change Observations. Nitrate The sample turns pink. The following item is based on an analysis of the data. Explain your answer. Expert Help. Explain your answer. immediate ch yes Chemical Change E (YiN) Copper(I) 1. I would believe that the substance is actually sodium hydroxide. C white powder i. 0000003188 00000 n Data Tables and Observations. 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. Hi there! black, 3 2 The flame glowed Using a pipet two drops each chemical was deposited into the 24-well plate. I expect BTB to turn orange with an acid and blue with a base. When a soda is poured into a glass and the soda bubbles, is it the result of a chemical The clear liquid Thank you! The blue crystals melted during both hear a while. Write the chemical equation for the reaction in well A6. vinegar? d. 218.33 mL NaCl. Transcribed Image Text: 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 .
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