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Why does the reaction quotient Q increase with time at the initial stages of the reaction in which two reactants A & B are mixed to give products C & D. Please Explain?

Why does the reaction quotient Q increase with time at the initial stages of the reaction in which two reactants A & B are mixed to give products C & D. Please Explain?

Grade:11

1 Answers

AskiitianExpert Pramod-IIT-R
47 Points
11 years ago

let a reaction A + B == C + D the value of Q = [C][D]/[A][B]. Initially the concentration of C and D is zero and the concentrations are only of A and B. More concentration of a compound will give more probability to react with another substance. Initially the concentrations of A and B are high, so more chance to interact with each others. more chance to form the compounds C and D. So A and B will convert into C and D. The concentration of A and B will go down and rate of change from A+B to C+D will go down. so in Q equation [A] and [B] decreasing and [C] & [D] increasing. So Q value will increases with time as the reaction proceeds to equilibrium. With regards Pramod Kumar IITR Alumni

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