MHT CET202613 April 2026Evening ShiftChemistryIonic EquilibriumActual
What is the concentration of hydrogen ion in the solution when the concentration of hydroxyl ion is 0.08 mol / dm ^3 at 298 K ?
Options
- A0.125 mol/L
- B0.125 10⁻¹² mol/L
- C0.0125 mol/L
- D0.125 10⁻¹⁰ mol/L
Correct answer
B. 0.125 10⁻¹² mol/L
Step-by-step solution
At 298 K, the ionic product of water is K_w = [H^+][OH^-] = 1.0 10⁻¹⁴ . Given [OH^-] = 0.08 mol/dm ^3 = 0.08 mol/L. [H^+] = K_w [OH^-] = 1.0 10⁻¹⁴ 0.08 [H^+] = 1 8 10⁻¹² = 0.125 10⁻¹² mol/L. Answer: 0.125 10⁻¹² mol/L