Calculate the molar concentration of oh - ions in a 0.555 m solution of hypobromite ion (bro-; kb=4.0*10-6).

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Chemistry

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4 February, 23:49

Calculate the molar concentration of oh - ions in a 0.555 m solution of hypobromite ion (bro-; kb=4.0*10-6).

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Akira Meza · Answer 1

According to the reaction equation:

and by using ICE table:

BrO - + H2O → HBrO + OH-

initial 0.555m 0 0

change - X + X + X

Equ (0.555-X) X X

when Kb = [HBrO][OH-] / [BrO-]

by substitution:

4 x 10^-6 = X^2 / (0.555-X) by solving for X

∴ X = 0.00149

∴[OH-] = X = 0.00149 m