JEE Main Chemistry question
The pH of 0.1 M NaHS is, Ka₁ and Ka₂ of H₂S are 1.3×10⁻⁷ and 7.1×10⁻¹⁵ respectively:
Answer: (A)
Solution
For amphiprotic HS⁻, pH≈½(pKa1+pKa2)=½(6.89+14.15)=10.52.
The pH of 0.1 M NaHS is, Ka₁ and Ka₂ of H₂S are 1.3×10⁻⁷ and 7.1×10⁻¹⁵ respectively:
For amphiprotic HS⁻, pH≈½(pKa1+pKa2)=½(6.89+14.15)=10.52.