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An aqueous solution of formic acid, HCOOH, is prepared at 0.075 M. The acid-ionization constant is...

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Chemistry

An aqueous solution of formic acid, HCOOH, is prepared at 0.075M. The acid-ionization constant is Ka= 1.8 x 10-4. Because this is a weak acid, you maypresume that the ionic strength is negligible (m = 0).Calculate:

a) the pKa of HCOOH

b) [H+]

c) [HCOO-]  

d) [HCOOH] at equilibrium

Answer & Explanation Solved by verified expert
3.9 Ratings (537 Votes)
a Given Ka 18104 use pKa log Ka log 18104 37447 Answer 374 b HCOOH dissociates as HCOOH H HCOO 75102 0 0 75102x x x Ka HHCOOHCOOH Ka xxcx Assuming    See Answer
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