Ionic EquilibriumHard

Question

When 0.05 moles of the following acids are dissolved in 1000 ml of H2O, the [H+] will be greatest in

Options

A.HNO2: pKa = 3.0
B.HCOOH: pKa = 3.75
C.HCN: pKa = 9.4
D.CH3COOH: pKa = 4.75

Solution

Smaller PKa, stronger acid, greater [H+].

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