ࡱ;   R FE0CompObj\WordDocument`ObjectPool wE0 wE0CDEFGHI FMicrosoft Word 6.0 DocumentNB6WWord.Document.6; #@)#+E!|E!~E!$(-$,''"7" C$X9#.#/"XJ#$6E!|Lab: THE HEAT IS ON WITH ZINC AND COPPER  Introduction When you add zinc granules to a solution of blue copper sulfate, a number of changes can be seen. If the amount of zinc is doubled, will the changes double? Predict the result of adding successively large amounts of zinc to the copper sulfate solution. Your class will be a research team. Each group will perform a part of the experiment and add their part of the results to the overall class data. MATERIALS granular zinc (a mass of 1, 2, 4 or 8 grams will be assigned to you) copper sulfate solution, 50.0 mL of 1 Molar thermometer polystyrene coffee cup graduated cylinder Procedure 1. Pour 50.0 mL of copper sulfate solution into a polystyrene coffee cup. Set the cup in beaker to make it stable. 2. Place the thermometer in the solution. Record this temperature in your data table. 3. Weigh out the number of grams of zinc assigned to you. Record the mass in the data table. 4. Stir the zinc into the solution. Stir gently with you thermometer. 5. Record the highest temperature reached during this reaction. 6. Observe the color of you solution. 7. Calculate the heat (calories) obtained from the reaction. Assume that the copper sulfate solution is essentially water. 8. Without checking other students data, predict the results of the addition of the other masses of zinc. 9. After you have done 7 and 8, then collect data from the other lab groups. Prepare a graph by plotting the calories produced (y-axis)against the amount of zinc used(X-axis). Data VOLUME OF COPPER SULFATE SOLUTION (ML)INITIAL TEMPERATURE OF SOLUTION (C)FINAL TEMPERATURE OF SOLUTION (C)COLOR OF SOLUTION CLASS DATA AMOUNT OF ZINC USEDHEAT PRODUCEDCOLOR OF SOLUTION Calculations 1. Calculate the grams of water used (remember that the density of water is 1/ 1mL). 2. Calculate the temperature change. 3. Calculate the heat for this reaction. 4. Is the reaction exothermic or endothermic? Analysis 1. What kind of reaction is the zinc/copper reaction? 2. Which substance is the limiting reagent in the mixture? 3. Which substance is the limiting reagent in the mixture of 8 grams of zinc plus 50 mL of copper sulfate solution. How do you know? 4. Explain the curve on you graph. Why is the calorie increase not regular as the amount of zinc is doubled? HEATS Name: _______________________ Partner #1: _______________________ Partner #2: _______________________ Acton-Boxborough Regional High School Due Date: ______________________ Acton-Boxborough Regional High School  |HH(EG(HH(d'p|HH(EG(HH(d'p |HH(EG(HH(d'p00&ta0`0(00&00&00&00&00& Oh+'0& , 8 DPX `l LScience F:Applications:Microsoft Office:Microsoft Word 6:Templates:chem labLAB: TITLE OF LABsciencescience'@"B0@v@ D0SummaryInformation(B@Microsoft Word 6.0.13; ܥhO e2 `O 4VVVVVn xV4V &X~4 @4  6 8Lab: THE HEAT IS ON WITH ZINC AND COPPER  Introduction When you add zinc granules to a solution of blue copper sulfate, a number of changes can be seen. If the amount of zinc is doubled, will the changes double? Predict the result of adding successively large amounts of zinc to the copper sulfate solution. Your class will be a research team. Each group will perform a part of the experiment and add their part of the results to the overall class data. MATERIALS granular zinc (a mass of 1, 2, 4 or 8 grams will be assigned to you) copper sulfate solution, 50.0 mL of 1 Molar thermometer polystyrene coffee cup graduated cylinder Procedure 1. Pour 50.0 mL of copper sulfate solution into a polystyrene coffee cup. Set the cup in beaker to make it stable. 2. Place the thermometer in the solution. Record this temperature in your data table. 3. Weigh out the number of grams of zinc assigned to you. Record the mass in the data table. 4. Stir the zinc into the solution. Stir gently with you thermometer. 5. Record the highest temperature reached during this reaction. 6. Observe the color of you solution. 7. Calculate the heat (calories) obtained from the reaction. Assume that the copper sulfate solution is essentially water. 8. Without checking other students data, predict the results of the addition of the other masses of zinc. 9. After you have done 7 and 8, then collect data from the other lab groups. Prepare a graph by plotting the calories produced (y-axis)against the amount of zinc used(X-axis). Data VOLUME OF COPPER SULFATE SOLUTION (ML)INITIAL TEMPERATURE OF SOLUTION (C)FINAL TEMPERATURE OF SOLUTION (C)COLOR OF SOLUTION CLASS DATA AMOUNT OF ZINC USEDHEAT PRODUCEDCOLOR OF SOLUTION Calculations 1. Calculate the grams of water used (remember that the density of water is 1/ 1mL). 2. Calculate the temperature change. 3. Calculate the heat for this reaction. 4. Is the reaction exothermic or endothermic? Analysis 1. What kind of reaction is the zinc/copper reaction? 2. Which substance is the limiting reagent in the mixture? 3. Which substance is the limiting reagent in the mixture of 8 grams of zinc plus 50 mL of copper sulfate solution. How do you know? 4. Explain the curve on you graph. Why is the calorie increase not regular as the amount of zinc is doubled? HEATS Name: _______________________ Partner #1: _______________________ Partner #2: _______________________ Acton-Boxborough Regional High School Due Date: ______________________ Acton-Boxborough Regional High School  |HH(EG(HH(d'p|HH(EG(HH(d'p |HH(EG(HH(d'p00&ta0`0(00&00&00&00&00&()*+,9K  N O T  - 1 2 uU]cU]cU]uD]a UZ]c( UZ]c()+9:IUlY>dK    1 2 3 W X Y { $$$,$$$$$$$$$$$,$,$,$,$,$l H$h'{ | } I J K L q $$$$$        $$$$$$$$$$$$,$,$$$$$hl  $l H$$q r s t    T U V : O s    $$$$$$$$$$$$$$$$$,$,$$$$$$$$$$$$$$T$T 0 !l h !s0h !sh%  / 0 1 2 $h 0 !lK@Normal]a "A@"Default Paragraph Font @ Header ! @ Footer !*O"* Chem HeaderL UZ]c2 2 D   Qc2 o{ q  2 )+2 ?o8science-Science F:Teacher Folders:Murphree:ZN/CU HEAT@ll ll >VMTimes New Roman Symbol MArial MTimesMNew Century Schlbk"1h;F̃;F!~KScience F:Applications:Microsoft Office:Microsoft Word 6:Templates:chem labLAB: TITLE OF LABsciencescienceࡱ;