Question

Consider an aqueous solution, 0.1 M each in HOCN, HCOOH, $(COOH{)}_{2}and{H}_{3}P{O}_4$ for HOCN, we can write $K_a\left(HOCN\right)=\frac{\left[H^{+}\right]\left[OC{N}^{-}\right]}{\left[HOCN\right]}\cdot \left[H^{+}\right]$ in this expression refer to

• A. $H^{+}$ ions released by HOCN
• B. Sum of $H^{+}$ ions released by all monoprotic acids
• C. Sum of $H^{+}$ ions released only the first dissociation of all the acids.
• D. Overall $H^{+}$ ion concentration in the solution.

Answer 1

The correct option is D Overall $H^{+}$ ion concentration in the solution.

All the concentrations refer to overall concentrations in the solution.