Missouri S&T CHEM 002 - Sample Questions for Chem 002 Final FS10 (8 pages)

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Sample Questions for Chem 002 Final FS10



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Sample Questions for Chem 002 Final FS10

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Pages:
8
School:
Missouri University of Science and Technology
Course:
Chem 002 - General Chemistry Lab

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Sample Questions for Chem 002 Final FS10 1 MSDS the rest listed on review a Proper attire b Acid Spill c Bunsen Burners d Phenolphthalein e Types of radiation listed below are stopped by what type of material alpha beta gamma neutron 2 Ternary Mixture A mixture is known to contain the four compounds in the table a Draw a flow chart to show the steps that you would use to separate the following compounds benzoic acid Mg OH 2 Na2SO4 Zn OH 2 Cold water no no yes no Hot water yes no yes no 3M HCl no yes yes yes 3M NaOH yes no yes yes b The initial mass was 5 025g The resulting masses were benzoic acid 1 760g Mg OH 2 0 754g Na2SO4 1 005g and Zn OH 2 1 256g Calculate the percent recovery of each component and the total percent recovery Updated 110421 1 3 Radioactive Decay a Balance the following radioactive decay equations 222 86Rn 42He 234 0 Th 90 1e anti b Determine the specific decay constant initial activity and half life of a radioactive isotope Given the equations A Aoe kt lnA kt lnAo ln 2 0 693 Time minutes 0 2 3 4 5 6 10 Counts Min t ln2 k y mx b m y2 y1 x2 x1 and the data ln Counts Min 14472 14328 14248 14095 13920 13359 1 Determine the specific decay constant k for this radioactive decay 2 Determine the initial activity Ao 3 Determine the half life Updated 110421 2 4 Heat of Neutralization A reaction of 100mL of 1 35M HCl and 100mL of 1 76M NaOH is monitored and the following temperatures were recorded starting temperature 24 6 oC and final temperature 38 8 oC Calculate the H of this reaction Given Cp of solution J K 4 13 J g K Volume of solution in mL Cp of calorimeter J K 50 Q total Cp T H Q n 1 mL 1 g for aqueous soln T Tf Ti n of moles reacted a Determine the change in temperature for the system b Determine the Cp of the solution J K c Determine the total Cp of the system d Determine the number of moles of the acid and the base Which is the limiting reagent e Determine the Heat Transfer Q for the reaction f Determine the change in enthalpy H for the reaction



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