Verified Answer :

-5
[OH-]=2.24 X 10    M

Answer : The hydroxide ion concentration in a solution of ammonia is, \(2.2\times 10^{-5}M\)

Explanation : Given,

pOH = 4.65

pOH : It is defined as the negative logarithm of hydroxide ion concentration.

Mathematically it is represented as :

\(pOH=-\log [OH^-]\)

\(4.65=-\log [OH^-]\)

\([OH^-]=2.2\times 10^{-5}M\)

Therefore, the hydroxide ion concentration in a solution of ammonia is, \(2.2\times 10^{-5}M\)