Ionic Equilibrium PYQs

The pH of the solution containing 50 mL each of 0.10 M sodium acetate and 0.01 M acetic acid is: [Given pK$_a$ of CH₃COOH = 4.57]

Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations: pH of which one of them will be equal to 1?

A 0.1 M acetic acid solution ionizes to 1.2%. What is the value of Ka?

For a 0.5 M H₂SO₃ solution, Kₐ₁ = 1.8 × 10⁻² and Kₐ₂ = 8.3 × 10⁻⁵. Find the concentrations of H⁺, HSO₃⁻ and SO₃²⁻.

Which of the following pairs constitutes a buffer?

The hydrogen ion concentration of a 10⁻⁸ M HCl aqueous solution at 298 K (K$_w$ = 10⁻¹⁴) is: