What is the concentration of a solution of K2CO3 that has pH = 11.90? (For H2CO3, Ka1 = 4.2 x 10^-7, Ka2 = 4.8 x 10^-11.) | Aqueous Chemistry

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Question

What is the concentration of a solution of K₂CO₃ that has pH = 11.90? (For H₂CO₃, Ka₁ = 4.2 x 10^-7, Ka₂ = 4.8 x 10^-11.)

3.0 x 10^-1 M

✓ Correct

2.6 x 10^-2 M

7.9 x 10^-3 M

1.3 x 10^-12 M

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