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In aqueous solution, hypobromite ion, BrO-, reacts to produce bromate ion, BrO3-, and bromide ion, Br-,...

In aqueous solution, hypobromite ion, BrO-, reacts to produce bromate ion, BrO3-, and bromide ion, Br-, according to the following chemical equation.
3 BrO- (aq) --> BrO3- (aq) + 2 Br- (aq)
A plot of 1/[BrO-] vs. time is linear and the rate constant, k, is equal to 0.056 M-1s-1. If the initial concentration of BrO- is 0.80 M, how long will it take* the concentration of the BrO- ion to be 0.40 M?

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