CH-1079

Strong and weak acids

Chemistry · Secondary 4 · Medium · Strong and weak acids

The dissociation constants,

K_a

, of two organic acids at 25 °C are:

- Acid X:

K_a = 1.5 \times 10^{-5}

- Acid Y:

K_a = 2.0 \times 10^{-3}

Which statement about their strengths in water is correct?

Acid Y is stronger because it has a larger $K_a$ value
Acid X is stronger because it has a smaller $K_a$ value
Both acids have the same strength because both are weak acids
Acid X is stronger because it produces fewer ions

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