The K_a for formic acid (HCO₂H)is 1.8 × 10^-4. What is the pH of a 0.10 M aqueous solution of sodium formate (NaHCO₂)?

Name: The K a for formic acid (HCO 2 H)is 1.8 × 10 -4 . What is the pH of a 0.10 M aqueous solution of sodium formate (NaHCO 2 )?
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Quizplus · Accepted Answer

Sodium formate is the salt of a weak acid (formic acid) and a strong base (sodium hydroxide). The solution will be basic. Using the Kb = Kw/Ka relationship, calculate the pOH, then subtract from 14 to find the pH. The pH is approximately 8.37.

The Ka for Formic Acid (HCO2H)is 1

The K_a for Formic Acid (HCO₂H)is 1