During the kinetic study of the reaction, 2 A + B → C + D , following results were obtained: Run I II III IV [ A ] / mol L − 1 0.1 0.3 0.3 0.4 [ B ] / mol L − 1 0.1 0.2 0.4 0.1 Initial rate of f

Question

During the kinetic study of the reaction, 2 A + B → C + D , following results were obtained: Run I II III IV ​ [ A ] / mol L − 1 0.1 0.3 0.3 0.4 ​ [ B ] / mol L − 1 0.1 0.2 0.4 0.1 ​ Initial rate of formation of D / mol L − 1 min − 1 ​ 6.0 × 1 0 − 1 7.2 × 1 0 − 1 28.8 × 1 0 − 1 24.0 × 1 0 − 1 ​ ​ Based on the above data which one of the following is correct?

TestHub · Accepted Answer

In case of (II) and (III) Keeping concentration of [A] constant, when the concentration of [ B ] is doubled, the rate quadruples. Hence it is second order with respect to B . In case of I & IV Keeping the concentration of [B] constant, when the concentration of [ A ] is increased four times, rate also increases four times. Hence, the order with respect to A is one. Hence Rate = k [ A ] [ B ] 2

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