Write four major factors influence the rate of chemical reactions. What is the o

Question

Write four major factors influence the rate of chemical reactions. What is the overall order of the reaction with respect to A and B for a reaction that obeys the rate law: Rate =K[A]^2 [B]^2? It is found for the reaction A+B rightarrow C that doubling the concentration of A doubles the rate of reaction and doubling the concentration of B quadruples the reaction rate. Write the rate law or this reaction. What is the overall reaction order of the reaction. If 3.5times10^-4 mol of S_2 O_8^2^- in 40 mL of solution is consumed in 160 seconds, what is the rate of consumption of S_2O8^2^_? Rate of consumption=-delta[S_@O8^2/t]

Explanation / Answer

2) Order wrt A = Order wrt B = 2

Overall Order = 2+2 = 4

3) Doubling the conc. of A doubles the rate => Reaction is 1st order with respect to A

Doubling the conc. of B quadruples the rate => Reaction is 2nd order with respect to B

a) Rate = K [A] [B]2

b) Overall Order of the reaction = 1+2 = 3

4) Moles of S2O8 2- consumed = 3.5 x 10^-4 mole

Volume of solution = 40 mL = 0.04 L

[S2O8 2-] = Moles / Volume = 3.5 x 10^-4 / 0.04 = 8.75 x 10^-3 M

time = 160 sec.

Rate of consumption = 8.75 x 10^-3 / 160 = 5.47 x 10^-5 M / s

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