Home
Class 12
CHEMISTRY
The rate constant for a second order rea...

The rate constant for a second order reaction is `k=(2.303)/(t(a-b))log""(b(a-x))/((b-x))`
where a and b are initial concentrations of the two reactants A and B involved. If one of the reactants is present in excess, it becomes pseudo unimolecular. Explain how ?

Text Solution

Verified by Experts

Suppose B in excess so that `bgtgta" or "x`. Neglecting a and x in comparison to b, the equation reduces to `"k b"=k'=(2.303)/(t)log""(a)/(a-x)` which is same as for reactions of 1st order.
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    PRADEEP|Exercise CONCEPTUAL QUESTIONS (VI. Activation energy, effect of temp. on rate (Arrhenius eqn.) and effect of catalyst on rate)|9 Videos

  • CHEMICAL KINETICS

    PRADEEP|Exercise CONCEPTUAL QUESTIONS (VII. Collision theory)|1 Videos

  • CHEMICAL KINETICS

    PRADEEP|Exercise CONCEPTUAL QUESTIONS (IV. Integrated rate equations, half-life, determination of rate law, rate constant and order)|6 Videos

  • BIOMOLECULES

    PRADEEP|Exercise IMPORTANT QUESTIONS (FOR BOARD EXAMINATION)|25 Videos

  • CHEMISTRY IN EVERYDAY LIFE

    PRADEEP|Exercise IMPORTANT QUESTION FOR BOARD EXAMINATION|30 Videos

Similar Questions

Explore conceptually related problems

For a second order reaction k=1/t.x/(a(a-x)) if the concentration of the two reactants A and B are:

Rate constant k=2.303 min^(-1) for a particular reaction. The initial concentration of the reactant is 1 mol // litre then rate of reaction after 1 minute is:

In a first order reaction A to B, if k is rate constant and initial concentration of the reactant A is 2 M then the half life of the reaction is:

In a first-order reaction A rarr B , if K is the rate constant and initial concentration of the reactant is 0.5 M , then half-life is

Surface catalysed reaction that are inhibited by the products obey the rate equation (in same cases) (dx)/(dt)=(K(a-x))/(1+bx) , where a is the initial concentration of the reactant and K and b are constants. Intergrate this equation. Derive an expression for t_(1//2) . x is the concentration of products at any time t and the reaction is Ararr B .