Calculate `[H^(+)] " and "%` dissociation of `0.1` M solution of ammonium hydroxide solution . The ionisation constant for `NH_(4)OH " is " K_(b) = 2.0 xx xx 10^(-5)` .

Explanation

To solve the problem, we need to calculate the concentration of hydrogen ions \([H^+]\) and the percentage dissociation of a 0.1 M solution of ammonium hydroxide \((NH_4OH)\) using the given ionization constant \(K_b = 2.0 \times 10^{-5}\).

### Step-by-Step Solution:

1. **Write the Dissociation Reaction:**
The dissociation of ammonium hydroxide can be represented as:
\[
NH_4OH \rightleftharpoons NH_4^+ + OH^-
...