Calculate [H⁺] in a 1

Multiple Choice

Calculate [H⁺] in a 1.0 M solution of Na₂CO₃ (for H₂CO₃, K_a1 = 4.3 × 10^-7 and K_a2 = 5.6 × 10^-11) .

A) 6.6 × 10^-4 M
B) 7.5 × 10^-13 M
C) 7.5 × 10^-6 M
D) 1.3 × 10^-2 M
E) none of these