Q. The ionization constant of ammonium hydroxide is 1.77 × 10⁻⁵ at 298 K. Hydrolysis constant of ammonium chloride is:
A) 6.50 × 10⁻¹²
B) 5.65 × 10⁻¹³
C) 5.65 × 10⁻¹²
D) 5.65 × 10⁻¹⁰
Explanation
[Solution from source] For the salt of a weak base and strong acid, Kh = Kw/Kb = 1.0 × 10⁻¹⁴/1.77 × 10⁻⁵ = 5.65 × 10⁻¹⁰. Values with 10⁻¹² or 10⁻¹³ come from slips in the exponent. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.