3. When the chemicals in the soda mix with the air while being poured into the glass, a gas is released. The chemical mixtures are noted below in the Data Tables. boiled in the test tube, but did not burn or change in color. helpful when trying to identify the chemical makeup of items. Get a custom sample essay written according to your requirements urgent 3h delivery guaranteed. 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 . Suppose a household product label says it contains sodium hydrogen carbonate (sodium. 0000005742 00000 n I would drop some of the hair tonic into some potassium iodide. 9. Here you will also find the best quotations, synonyms and word definitions to make your research paper well-formatted and your essay highly evaluated. Nitrate A chemical reaction occurred. If so, it most likely has sodium bicarbonate in it. Explain your answer using the 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. into a bright white Physical change. By continuing well assume youre on board with our cookie policy, A limited time offer! When the chemicals in the soda mix with the air while being poured into the glass, a gas is released. Burning paper Condensing vapor While the data sources included here represent a non-exhaustive list of those . Aqueous + Absorb in paper towel and expose to sunlight. Na2CO3 Sodium 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. Using your results f rom Data Table 1 as a guide, how would you 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 compound A physical change occurred. 1. 0000003571 00000 n Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. 0000002819 00000 n A chemical reaction is a process where the atomsform new substances. *jh DV_ =&)&(idnb]~U4g0Dt8otSb !0=rxg_mSy8|+o="Z7X ~3Ala}Jr\N/c6&bl:%qORyK1LkrL+N5 endstream endobj 61 0 obj <. Labpaq lab 1: Observation of chemical change lab report . Label each substance on seven pieces . The goals of the experiment observe properties of chemical reactions and to associate chemical properties with household products. Explain your answer. Explain your answer. Did either heating or burning produce a chemical change? left side, 5. We dont have your requested question, but here is a suggested video that might help. Get access to our huge, continuously updated knowledge base. b. Windex, i. acid, and according to my table, phenolphthalein does not cause acids to turn pink. Hydroxide 155.9 ml NaCl 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 . After exposure to bright light from my light bulb it turned a dark brown. Suppose a household product label says it contains sodium carbonate (sodium bicarbonate). False, 10. Combining dry ingredients (flour, salt, sugar,baking powder) when making muffins Data Tables and Observations. Appearance NH3 and BTB College of DuPage. ;Cr*P XU#VE-K.I0*^]4Wb!0I4/Z`i*;|usI""00Va6De=/{cuV%'T(6>fElvK5!%~aTbOw4T;u10k/y)'9>{0vv-kf@! + Absorb in paper towel and expose to sunlight Observation 2: No color change, Chemical change. B, clear to straw yellow color When the starch was added to sodium hypochlorite NaOCI and potassium iodide KI it turned black. 1. observations collected in Data Table 2. ash, 3 The flame glowed blue AgBO3 and NH3 Observation of Physical and Chemical Changes, Exercise 1: Observations of a Chemical Change. black, Copyright 2019 - Hands-On Labs | http://holscience.com 10 / 10, CHEM181DL1_ObservationsofChemicalChanges_48408.pdf. Heat an ice cube in a beaker. 4. It did turn a bit darker blue. 0000001376 00000 n Identify the products and the reactants in the reactions. Three of the flavor-samples turn a murky green indicating thelikelihood of acid/base balance. One of the reactions you observed resulted in these products: NaCl + H O + CO (g)? Instructor Lea Stage, CHEM 181 DL1 0000003663 00000 n How about getting this access immediately? 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. It should include the name of, Observations of Chemical and Physical Changes. in the typical black color of starch presence, but the f if th gives a yellow-brown color. ii. Then allow the melted wax to cool. Student NameStudent ID yumeng zhang 164162 A metal is added to a liquid and bubbles form. A white precipitate formed from the mixing of two liquids is an indication of a chemical change. The reaction was a misty blue color. 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. clear liquid How would you test this material for the presence of sodium bicarbonate? A chemical change may also be referred to as a _____. cloudy 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. flame, then turned into clear liquid 9. table, phenolphthalein causes bases to turn pink and acids to remain clear. 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). Na cO3 Sodium 8. Explain your answer. clear liquid clear liquid Blablawriting.com provide for you a wide variety of top-notch essay and term paper samples on any possible topics absolutely. The Describe how the observations for this reaction support your answer. Copyright 2019 - Hands-On Labs | http://holscience.com 3 / 10, Data Table 1: Chemical Change Observations. In the second step, the reactant was the direct sunlight. It melted and While performing a starch test on several dif f erent cookie brands, f our tests result 0000154339 00000 n What does this indicate about a buffers ability to maintain pH when an acid or a base is added?, 1. HCI and BTB Aqueous Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). clear liquid immediately t yes Yellow thick precipitate Is cutting a cake into 8 pieces a chemical or a physical change? Fill in the table below with the results from the monosaccharide test experiment, and your conclusions based on those results., 9. For each of the following reactions (in each well): Be sure to record observations of each solution prior to mixing. 5. The color was more pronounced under the white piece of paper. 0000013556 00000 n 3. You have read that a new brand of hair tonic is supposed to contain lead (an ingredient in Grecian Formula). Cu(NO ) . Carbonate 0000003188 00000 n Observations of Chemical Changes. dilution factor for BETA from ALPHA solution = 0.0476 c. Apple Jucie. Which of the four chemicals that was heated produced a physical change? Your Answer Is Very Helpful For UsThank You A Lot! 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. Hydrochloric occurred, Copyright 2019 - Hands-On Labs | http://holscience.com 6 / 10. Academic anxiety? 2. Turned blue & precipitate formed, at bottom clear liquid AgNO3 (aq) + NaOH (aq) ------> AgOH (s) + NaNO3 (aq). Acid Separates to edges leaving hole in the middle. Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO3 Sodium Bicarbonate HCl Hydrochloric Acid When the HCL was added, it bubbled for about 2 seconds then stopped. Automatically turned a bright pink. In our prior experiments when phenolphthalein was added to a solution that was acidic it had no reaction, it stayed clear. List whether each of the following substances was positive or negative for protein, as indicated by the Biuret test. Explain white powder 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 got a very similar reaction while burning and heatingburning and turned a green color and turned black afte the Cu(NO3)2. Observations Chemical Data Table 1 Session 2019L2 CHEM 181 DL1 0000004304 00000 n Log in Join. That gas causes the bubbles and fizzing. flame when heated. _____ magnesium generates a very bright light. Obsarvation data table 1: chemical change observations. turned black, Glowed red, then turned Copying is only available for logged-in users, If you need this sample for free, we can send it to you via email. Did either heating or burning produce a chemical change? iPad. support your answer. Turned a dark orange color. 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. verif y that it is vinegar, you add a few drops of phenolphthalein. In well B1, what was the reactant in the second change? white powder 0000026639 00000 n C20H1404 clear liquid Observation Use your observations in Data Table 1 to describe a positive result for this test. data table 1: chemical change observationspet friendly rentals lewis county, wa data table 1: chemical change observations. 1. clear liquid brown grainy yes bubbles, is it the result of a chemical. 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. When a soda is poured into a glass and the soda change? 0000007380 00000 n answer using the observations collected in Data Table 2. clear liquid 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. turned to a w yes chemical is turned the color of dark brown similar to rust on the paper towel. Categorize each change as physical or chemical. immediate ch yes Did either heating or burning produce a chemical change? 2. bubbled and turned ting and. Observations To verifythalein. Observation 2: Explain your answer. When the can is opened the CO2 escaped the liquid causingbubbles. Using a pipet two drops each chemical was deposited into the 24-well plate. I would believe that the substance is actually sodium hydroxide. Apple slices turning brown in the air. Phenolphthalein The otherwise clear Green Works solution turned bright yellow and produced gas bubbles when mixed BTB. Copyright 2019 - Hands-On Labs | http://holscience.com 7 / 10. Change This would indicate that it is acidic. Data Tables: WELL/QUESTION A1/A B1/B C1/C D1/D . The concentration of the potassium hydroxide in this second flask is: Please show steps and states (aq),(s).. etc thank you. Show your work: Balance the following chemical equation: 1. Formation of gas bubbles were immediate and consistent for some time. 60 0 obj <> endobj xref 60 54 0000000016 00000 n drops) Please please please show all the work 0000005326 00000 n Test the pH of weigh boat "C" using new litmus paper. HCI and Blue Dye looks the san yes Get 5 free video unlocks on our app with code GOMOBILE, Data Table 1: Chemical = Change' Observations Institution De Anza College Both a chemical and physical change occurred. right side C %PDF-1.6 % 0000008196 00000 n Chemical 0000004644 00000 n 8. NaOH and phenolphthalein Instructor James Maxwell. Chemical: Change', 2. Explain your answer. green, the crystals The reactions in A5 definitely support this From the above data, give the correct formula for the hydrate. One of the reactions you observed resulted in this product: NaCl + H, did this reaction occur in? K /B4 Phenolphthalein C2 Study Resources. In this experiment, I learned that chemicals react in many ways when exposed to different things. The reactant was sunlight which caused a chemical change. Looked thicker than other liquids. 0000016961 00000 n The following item is based on an analysis of the data. 0000001895 00000 n ii. Physical observations can be used to determine if a chemical change has occurred. Green Works from Clorox Did either heating or burning produce a chemical change? Identify whether each statement is an observation or a conclusion. Describe how the observations for this reaction 0000010561 00000 n Bisulfate just glowed red and turned into ashes. 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? Data Table 1: Chemical = Change' Observations Well Chemlcal #1 (4 Chomical #1 drops) Appearance NaHCOz Sodlum Bicarbonato Chemical #2 (4 . 5 Sodium hydroxide is a base and hydrochloric acid is an acid. b. When a soda is poured into a glass and the soda bubbles, is it the result of a chemical Start your trial now! Easier to see under black paper. NH; Aqucous Ammonia Chemical Reactions. magnesium metal. Course CHEM 181 DL1 Think about how phenolphthalein acts as an acidwell A5 support this or contrast what you would expect to happen? change? 0000015516 00000 n Copper(II) IKI Indicator Color change to light blue. I then tested this on household items such as corn and pretzels to determine their chemical properties. No problem! Would you like to get such a paper? Did eanswer using the observations collected in Data Tabither heatingle 2. HC directly over a flame, the magnesium bursts into a bright white light, whereas in the test tube it Phenolphthalein Pb(NO3}2 clear liquid no change-cl no Turned a yellow color and more bubbles (more than the carbonated soda) were produced. The solution is cloudy and there are smallflakes. 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. what does r 4 mean in linear algebra; borage tincture recipe; lorgnette opera glasses;
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