Editing Lab Quiz On Physical And Chemical Change Lab Including Additional Steps
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<br> Name: ___________________________ Period: ____________<br> <center>Lab Quiz on Physical and Chemical Change Lab including Additional Steps</center><br> <br> <center><b>"A NEW SUBSTANCE IS FORMED" IS NOT A SUFFICIENT ANSWER FOR QUESTIONS BELOW</b></center><br> <br> Answer the following questions using your Lab notebook (specifically Physical and Chemical Change Lab and [[Additional Steps in Physical and Chemical Change Lab - Revised 2022-2023]]).<br> <br> <br> 1) In Step 1 of the original lab, circle the change:<br> a) When you added energy to wax in test tube: Physical or Chemical<br> b) When you added energy to the candle (made of wax): Physical or Chemical<br> <br> <br> 2) In Step 3 of the original Physical and Chemical Change Lab, you added some <nowiki>AgNO</nowiki><sub>3</sub> solution to the <nowiki>NaCl</nowiki> solution. When you added the two solutions together, answer the following:<Br> a) Was this a CHEMICAL CHANGE or PHYSICAL CHANGE (circle one).<br> b) In a sentence or two explain why (use lab observation to support explanation) what you circled above ("new substance is formed" is not an observation).<br> <br> <br> <br> <br> 3) In Step 4, you added HCl (Hydrochloric acid) solution to a piece of Mg (Magnesium metal):<br> a) Was this a CHEMICAL CHANGE or PHYSICAL CHANGE (circle one)<br> b) What observation(s) determine what you circled above ("new substance is formed" is not an observation). DO NOT NEED TO EXPLAIN WHY HERE<br> <br> <br> 4) In Step 5 of the original lab, you ground up the Copper (II) sulfate, added it to a test tube, heated it, let it cool and then added water. What observation showed you that this was a PHYSICAL CHANGE? <br> <br> <br> <br> <P style="page-break-before: always"> <br> Name: ___________________________ Period: ____________<br> <center>Lab Quiz on Physical and Chemical Change Lab including Additional Steps (CONTINUED)</center><br> <br> <center><b>"A NEW SUBSTANCE IS FORMED" IS NOT A SUFFICIENT ANSWER FOR QUESTIONS BELOW</b></center><br> <br> Answer the following questions using your Lab notebook (specifically Physical and Chemical Change Lab and [[Additional Steps in Physical and Chemical Change Lab - Revised 2022-2023]]).<br> <br> <br> 5) In Step C of the Additional Steps, which of the following (circle answer) DID NOT have a Tyndal Effect, Colloid, Suspension or Solution?<br> <br> <br> 6) What characteristic(s) of the particles in the mixtures (Colloid, Suspension and Solution) causes the Tyndal Effect?<br> <Br> <br> 7a) What was the other reactant of Step B besides the Mg ribbon?<br> <br> 7b) What was the observed characteristic(s) of the product of this chemical change/reaction?<br> <br> 7c) What was the product NAME (from notes you added in class after doing the lab).<br> <br> <br> 8) What Conservation Law helped you to determine what this product could be add up of? (no explain needed here)<br> <br> 9a) In Step A, what was your observation that a "precipitate" was formed after adding each of the two solutions to the Copper (II) sulfate solution?<br> <br> <br> 9b) From your observation from Step A and post-lab notes, what caused the "blue" color in the Copper (II) sulfate solution?<br> <br> <br>
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