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Unformatted text preview: 1 CHAPTER 12 HOMEWORK KEY 22. Consider the general reaction: aA + bB cC and the following rate data over some time period t: s L mol t A * / 0080 . = , s L mol t B * / 0120 . = , s L mol t C * / 0160 . = . Determine a set of possible coefficients to balance this general reaction. 30. The following data were obtained for the reaction: 2 C l O 2 (aq) + 2 OH- (aq) ClO 3- + ClO 2- (aq) + H 2 O (l) , where rate = [ ] t ClO 2 . [ClO 2 ] (mol/L) [OH- ] (mol/L) Initial Rate (mol/L*s) 0.0500 0.100 5.75 x 10-2 0.100 0.100 2.30 x 10-1 0.100 0.0500 1.15 x 10-1 a. Determine the rate law and the rate constant. b. What would be the initial rate for an experiment with [ClO 2 ] = 0.175 mol/L and [OH- ] = 0.0844 mol/L? 2 36. At 500 K in the presence of a copper surface, ethanol decomposes according to the equation: C 2 H 5 OH (g) CH 3 CHO (g) + H 2 (g) The pressure of C 2 H 5 OH was measured as a function of time and the following data were obtained: Time (s) P ethanol (torr) 0 250 100 237 200 224 300 211 400 198 500 185 Since the pressure of a gas is directly proportional to the concentration of gas, we can express the...
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This note was uploaded on 07/22/2008 for the course CHEM 105A taught by Professor Bau during the Summer '04 term at USC.
- Summer '04