Rate information was obtained for the following reaction at 25°C and 33°C; Cr(H2O)6 3+ + SCN¯ ---> Cr(H2O)5NCS2+ + H2O(l) Initial Rate [Cr(H2O)6 3+] [SCN-] @ 25°C 2.0x10-11 1.0x10-4 0.10 2.0x10-10 1.0x10-3 0.10 9.0x10-10 2.0x10-3 0.15 2.4x10-9 3.0x10-3 0.20 @ 33°C 1.4x10-10 1.0x10-4 0.20 a) Write a rate law consistent with the experimental data. b) What is the value of the rate constant at 25°C? c) What is the value of the rate constant at 33°C? d) What is the activation energy for this reaction?

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter19: Transitition Metals, Coordination Chemistry And Metallurgy

Section: Chapter Questions

Problem 19.69QE

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Rate information was obtained for the following reaction at 25°C and 33°C; Cr(H2O)6 3+ + SCN¯ ---> Cr(H2O)5NCS2+ + H2O(l) Initial Rate [Cr(H2O)6 3+] [SCN-] @ 25°C 2.0x10-11 1.0x10-4 0.10 2.0x10-10 1.0x10-3 0.10 9.0x10-10 2.0x10-3 0.15 2.4x10-9 3.0x10-3 0.20 @ 33°C 1.4x10-10 1.0x10-4 0.20 Can a 4th order reaction occur?
In the Courdinaten Compound Pt(NHe)zClz], the OXication nmber A Pt s +2 CoCrclination nimber is
The data below was collected from three trials of the following reaction: 2ClO2 (aq) + 2OH- (aq) --> ClO3- (aq) + ClO2- (g) + H2O (l) [ClO2]o (M) [OH-]o (M) Initial Rate (M/s) 1 0.0500 0.100 5.75 x 10-2 2 0.100 0.100 2.30 x 10-1 3 0.100 0.0500 1.15 x 10-1 If the initial concentrations were as follows, [ClO2]o= 0.25 M and [OH- ]o = 0.095 M, what would the initial rate be?
The data below was collected from three trials of the following reaction: 2ClO2 (aq) + 2OH- (aq) --> ClO3- (aq) + ClO2- (g) + H2O (l) [ClO2]o (M) [OH-]o (M) Initial Rate (M/s) 1 0.0500 0.100 5.75 x 10-2 2 0.100 0.100 2.30 x 10-1 3 0.100 0.0500 1.15 x 10-1 a) What is the generic rate law for this reaction? b) What is the order for each reactant? What is the order for the overall reaction? c) What is the complete rate law for this reaction? d) If the initial concentrations were as follows, [ClO2]o = 0.25 M and [OH- ]o = 0.095 M, what would the initial rate be?
8) In the reversible reaction [Co(H20)s]"(aq) + 4CI (aq) E>[Co(H20)2CI4]* (aq) + 4H20(1), the initial color of the reaction mixture was pink. When concentrated HCl (aq) was added to the reaction mixture, the color changed to purple. Which reactant is purple and why? a) [Co(H2O)s]*(aq) is purple because it is a cobalt compound b) [Co(H20)s]**(aq) is purple because adding CI (as HCI) shifted the reaction towards products c) HCl is purple because adding it turned the reaction purple d) [Co(H2O),Cl4]*(aq) is purple because adding Cl (as HCI) shifted the reaction towards products 9) In the reversible reaction Fe * (aq) + SCN (aq) E → FESCN2* (aq), the reactants are yellowish and the product is red. Why are iron (III) nitrate and potassium thiocyanate used to create this reaction mixture? a) iron and thiocyanate are spectator ions b) iron and thiocyanate are colorless c) nitrate and potassium are spectator ions d) nitrate and potassium are purple
First three sub-parts are solved Rate information was obtained for the following reaction at 25°C and 33°C; Cr(H2O)6 3+ + SCN¯ ---> Cr(H2O)5NCS2+ + H2O(l) Initial Rate [Cr(H2O)6 3+] [SCN-] @ 25°C 2.0x10-11 1.0x10-4 0.10 2.0x10-10 1.0x10-3 0.10 9.0x10-10 2.0x10-3 0.15 2.4x10-9 3.0x10-3 0.20 @ 33°C 1.4x10-10 1.0x10-4 0.20 a) Write a rate law consistent with the experimental data. b) What is the value of the rate constant at 25°C? c) What is the value of the rate constant at 33°C? d) What is the activation energy for this reaction? e) Can a 4th order reaction occur?
(d) M=? [M(CO),]+ (e) M=? H3CM(CO)5
Final Reactant Concentrations and Reaction Rates [I-] [BrO3-] [H+] Reaction Time Rate of Reaction 2.8 x 10-5/time Expt. # M M M sec. M/sec 1 0.00166 0.0066 0.0166 258 1.08 x 10^-7 2 0.0033 0.0666 0.0166 135 2.07 x 10^-7 3 0.00166 0.0133 0.0166 132 2.12 x 10^-7 4 0.00166 0.0066 0.033 78 3.58 x 10^-7 1.Using the information above determine the rate law (m, n and p) for the reaction. Show all calculations/reasoning in your notebook. m_______________ n_________________ p ____________
16. The calculated CFSE for [W(H2O)6] is: [A] [B] [C] [D] 2.4 Ao - 2P 2.4 Ao + 2P 2.4 Δο None of the above
3. The following results were obtained by monitoring the reaction H*, + 1/2 H,O2(aq) (aq) 1/2 Iyae) + H,O (aq) 2(aq) [H,O,] rate 0.020 0.020 3.3 x 10 0.040 0.020 6.6 x 10 0.060 0.020 9.0 x 10 0.040 1.3 x 10 0.040 Determine the order of the reaction with respect to I'and H,O, and also determine the value for the rate constant, k B. 口i @ Type here to search
7. The following data were collected for the reaction: (CH;);CBr + OH- (CH),СОН + Вr- trial [(CH;) CBr] [OH] rate of reaction (mol L-' s-') 1 0.50 M 0.050 M 0.0056 1.00 M 0.050 M 0.011 3 1.00 M 0.10 M 0.011 4 1.50 M 0.050 M 0.017 Determine the form of the rate law and calculate k, the rate constant. You must include units with your answer! Feel free to use any space above to determine relative concentrations/rate, but it's not required.
a plausible mechanism (i) MeCCLi (ii) BRCH 2COME (ii) CH 3CO2H

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