Calculate [H⁺] in a 0

Multiple Choice

Calculate [H⁺] in a 0.40 M solution of NaH₂PO₄. (For H₃PO₄, K_a1 = 7.5 × 10^-3, K_a2 = 6.2 × 10^-8, K_a3 = 4.8 × 10^-13)

A) 1.6 × 10^-4 M
B) 2.5 × 10^-4 M
C) 0.40 M
D) 3.9 × 10^-11 M
E) 2.2 × 10^-5 M