The reaction of iodide ion with hypochlorite ion, OCl^- (the active ingredient in a "chlorine bl

step 1 To determine the rate law, we need to know the order with respect to each reactant. To do this,

The reaction of iodide ion with hypochlorite ion, OCl^- (the...

The reaction of iodide ion with hypochlorite ion, $\mathrm{OCl}^{-}$ (the active ingredient in a "chlorine bleach" such as Clorox), follows the equation $\mathrm{OCl}^{-}+\mathrm{I}^{-} \longrightarrow \mathrm{OI}^{-}+\mathrm{Cl}^{-} . \mathrm{It}$ is a rapid reaction that gives the following rate data: What is the rate law for the reaction? Determine the value of the rate constant with its correct units.

The reaction of iodide ion with hypochlorite ion, $\mathrm{OCl}^{-}$ (the active ingredient in a "chlorine bleach" such as Clorox), follows the equation $\mathrm{OCl}^{-}+\mathrm{I}^{-} \longrightarrow \mathrm{OI}^{-}+\mathrm{Cl}^{-} . \mathrm{It}$ is
a rapid reaction that gives the following rate data: What is the rate law for the reaction? Determine the value of the rate constant with its correct units.

Key Concepts

Method of Initial Rates

The method of initial rates is an experimental technique used to determine the reaction order and rate constant by measuring the initial reaction rate under different concentrations of the reactants. By comparing how the rate changes with concentration, the individual reaction orders can be deduced and the rate constant calculated.

Rate Constant

The rate constant, k, is the proportionality factor in the rate law that is specific to a given reaction at a particular temperature. Its numerical value and units depend on the overall order of the reaction. For a first-order reaction, k has units of s?¹; for a second-order reaction, its units are typically M?¹ s?¹, and so on.

Rate Law

The rate law is an equation that relates the reaction rate to the concentrations of the reactants, typically expressed as Rate = k [A]^m [B]^n, where k is the rate constant and m and n are the orders of the reaction with respect to reactants A and B. It provides a quantitative measure of how the rate varies with concentration.

Reaction Order

The reaction order indicates the power to which a reactant’s concentration is raised in the rate law. It shows the sensitivity of the reaction rate to changes in the concentration of that reactant. The overall order of the reaction is the sum of the individual orders and determines the units of the rate constant.

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