Ionic Equilibria & pH: JEE Questions & Solutions

The first and second ionization constants of H₂X are 2.5 × 10⁻⁸ and 1.0 × 10⁻¹³ respectively. The concentration of X²⁻ in 0.1 M H₂X…

Consider the dissociation equilibrium of the following weak acid: HA ⇌ H⁺(aq) + A⁻(aq) If the pKₐ of the acid is 4, then the pH of a 10 mM…

If 1 mM solution of ethylamine produces pH = 9, then the ionization constant (K_b) of ethylamine is 10^(-x). The value of x is (nearest…

pH of water is 7 at 25^° C. If water is heated to 80^° C, its pH will:

A weak acid HA has degree of dissociation x. Which option gives the correct expression of pH - pKₐ?

The pH of a 0.01 M weak acid HX (Kₐ=4 × 10⁻¹⁰) is found to be 5. Now the acid solution is diluted with excess of water so that the pH of…

x mg of Mg(OH)₂ (molar mass = 58) is required to be dissolved in 1.0 L of water to produce a pH of 10.0 at 298 K. The value of x is mg.…

An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water). The pH of HCl solution…

When the hydrogen ion concentration [H⁺] changes by a factor of 1000, the value of pH of the solution:

Millimoles of calcium hydroxide required to produce 100 mL of the aqueous solution of pH = 12 is x × 10⁻¹. The value of x is (Nearest…

600 mL of 0.01 M HCl is mixed with 400 mL of 0.01 M of H₂SO₄. The pH of the mixture is × 10⁻². (Nearest integer) Given: log 2 = 0.30, log 3…

Incorrect statement for the use of indicators in acid-base titration:

The titration curve of a weak acid against a strong base, using phenolphthalein as the indicator, is shown below. Given: K_phenolphthalein…

Which of the following statement(s) is/are correct? (A) The pH of 1 × 10⁻⁸ M HCl solution is 8. (B) The conjugate base of H₂PO₄⁻ is HPO₄²⁻.…