A weak acid is 0.1% ionised in 0.1 M solution. Its pH is ………(a)

1.	A weak acid is 0.1% ionised in 0.1 M solution. Its pH is ………(a) 2 (b) 3 (c) 4 (d) 1
Answer» (c) 4 For a monobasic acid [H⁺] = c.α = \(\frac{1}{2}\) x 0.001 = 10^-4 pH = – log₁₀[10^-4] = 4

A weak acid is 0.1% ionised in 0.1 M solution. Its pH is ………(a) 2 (b) 3 (c) 4 (d) 1

Answer»

For a monobasic acid [H⁺] = c.α

= \(\frac{1}{2}\) x 0.001 = 10^-4

pH = – log₁₀[10^-4] = 4

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A weak acid is 0.1% ionised in 0.1 M solution. Its pH is ………(a) 2 (b) 3 (c) 4 (d) 1

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