A Solution of HCOOH ( K _a = 1

question 55

Multiple Choice

A solution of HCOOH ( K _a = 1.8×10 ^{- 4}) and HCOO ^- was submitted for chemical analysis. The results were:
[HCOOH] = 0.050 M, [HCOO ^- ] = 0.15 M. Calculate the pH.

• A) 4.22
• B) 3.74
• C) 3.27
• D) 1.30
• E) - 1.30

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