NEET Chemistry Chemical Kinetics Questions Solved


For the reaction

[Cr(H2O)4Cl2 ]+ (aq.) k1  [Cr(H2O)5C1]2+ (aq.) k2  [Cr(H2O)6 ]3+(aq.)

k1 = 1.78 × 10-3 s-1 and k2 = 5.8 × 10-5 s-1

If initial concentration of  [Cr(H2O)4Cl2 ]+is 0.0.174 M at 273 K. Calculate time at which concentration of [Cr(H2O)5Cl]2+ is maximum

(A) 1990 seconds.                                          

(B) 1090 seconds

(C) 2100 seconds.                                         

(C) 2110 seconds.

(A) We have 

t=2.303log k1-log k2k1-k2t=2.303log 1.78×10-3-log 5.8×10-51.78×10-3-5.8×10-5t=1990 seconds.

 

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