For Carbonic Acid (H₂CO₃), K_a1 = 4

question 29

Multiple Choice

For carbonic acid (H₂CO₃) , K_a1 = 4.30 × 10^-7 and K_a2 = 5.62 × 10^-11. Calculate the pH of a 0.50 M solution of Na₂CO₃.

• A) 11.97
• B) 8.31
• C) 10.67
• D) 2.03
• E) 3.33

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