Calculate the pH of the following weak acids:

CHEMISTRY · Multi-part · A Level · Chemistry · Acids and bases · Acids and bases

Problem

Calculate the pH of the following weak acids: (1) 0.50 mol dm^-3 phenol (

K_a = 4.59 \times 10^{-5}

) (2) 0.010 mol dm^-3 fluoroethanoic acid (

\text{p}K_a = 2.59

) (3) 0.25 mol dm^-3 nitric(III) acid, HNO₂, (

\text{p}K_a = 3.16

)