JEE Main Chemistry question
The aqueous solution of disodium hydrogen phosphate is:
Answer: (C)
Solution
For HPO₄²⁻, Kb=Kw/Ka₂≈1.6×10⁻⁷ ≫ Ka₃≈4.2×10⁻¹³, so hydrolysis dominates and the solution is basic.
The aqueous solution of disodium hydrogen phosphate is:
For HPO₄²⁻, Kb=Kw/Ka₂≈1.6×10⁻⁷ ≫ Ka₃≈4.2×10⁻¹³, so hydrolysis dominates and the solution is basic.