Calculate the [H⁺] in a 0 $\times$ 10^-10 $\times$ 10^-7 M
B)6 $\times$

Multiple Choice

Calculate the [H⁺] in a 0.068 M solution of HCN,K_a = 6.2 $\times$ 10^-10.

A) 1.0 $\times$ 10^-7 M
B) 6.5 $\times$ 10^-6 M
C) 4.2 $\times$ 10^-11 M
D) 1.3 $\times$ 10^-5 M
E) none of these