Question

The dissociation constant for NH₄OH is 1.8 × 10⁻⁵. The degree of dissociation in its 0.01 M solution is ______.

Options

• 0.04242

• 0.4242

• 0.004242

• 4.242

Answer 1

The dissociation constant for NH₄OH is 1.8 × 10⁻⁵. The degree of dissociation in its 0.01 M solution is 0.04242.

Explanation:

α = `sqrt(K_b/C)`

= `sqrt((1.8 xx 10^-5)/0.01)`

= `sqrt(180 xx 10^-5)`

= `sqrt(18 xx 10^-4)`

= 0.04242