Question

A weak monobase acid is 1% ionized in 0.1 m solution at 25 celcius, the percentage of ionisation in it's 0.025 m solution is

Answer 1

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Answer 2

The percentage ionization of a weak mono basic acid of 0.025 M concentration is equal to 2%.

• For a weak mono basic acid whose degree of ionization is small as compared to one, the degree of ionization is inversely proportional to the square root of the concentration.
• Since its given that percentage ionization of the acid is 1% at 0.1 M , the percentage ionization of the acid at 0.025 M is given by $\sqrt{\frac{0.1}{0.025} }$ ×1 , which is equal to 2%.