CHM152GW1 Su09

Chemistry (MasteringChemistry Series)

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CHM 152 Group Work 1 Summer 2009 1. What is the rate law for this reaction? H 3 BO 3 + 3 HCl J BCl 3 + 3 H 2 O ___ __________________________ 2. If the concentration of a reactant is doubled and the corresponding rate quadruples, what is the order with respect to that reactant? ____ 3. To graphically find the rate constant for a first order reaction you should plot __ __ versus time. 4. What is the half-life for a first order reaction if the initial concentration of reactant is 1.25M and after 69.2 seconds the concentration has dropped to 0.955M? 5. What percentage of a sample remains after 5 half lives? __ ___ ___ 6. What is the rate law for a zero order overall reaction? __________ 7. If an elementary step has two reactants, what is its molecularity? __________________ 8. The slow step in a mechanism is also called the _________________________ step. 9. According to the following balanced equation, if the rate of appearance of oxygen gas is 4.00 x 10
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Unformatted text preview: -2 M/s, what is the rate of disappearance of KClO 3 (s)? 2 KClO 3 (s) → 2 KCl(s) + 3 O 2 (g) a. 2.67 x 10-2 M/s b. 6.00 x 10-2 M/s c. 2.00 x 10-2 M/s d. 3.00 x 10-2 M/s e. 5.33 x 10-2 M/s 10. For this reaction: 2NO(g) + Cl 2 (g) J 2NOCl(g) the real rate law is rate = k [NO] [Cl 2 ] If the following steps are the mechanism, which one must be the rate determining step? _____ What is the intermediate in this mechanism? ____________ __ What is the overall order? _____ NO(g) + Cl 2 (g) J NOCl 2 (g) elementary step one NO(g) + NOCl 2 (g) J 2NOCl(g) elementary step two 11. Name one factor that can increase the success of reactant collisions. Explain how it increases the reaction rate. 12. What is the reactant concentration after 78.9 seconds for a second order reaction with a half-life of 3.l0 minutes if the initial concentration was 0.555M?...
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This document was uploaded on 09/27/2011.

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