Refer to an aqueous solution of formic acid, `HCOOH`, which has a `K_(a)` value of `1.9 xx 10^(-4)` at `25^(@)C`. How many moles

Refer to an aqueous solution of formic acid, `HCOOH`, which has a `K_(a)` value of `1.9 xx 10^(-4)` at `25^(@)C`.
How many moles of sodium formate must be added to `1.0L` of a `0.20M` formic acid solution to produce a pH of `4.00` ?
A. `0.38`
B. `0.80`
C. `1.9`
D. `3.8`

Refer to an aqueous solution of formic acid, `HCOOH`, which has a `K_(a)` value of `1.9 xx 10^(-4)` at `25^(@)C`. How many moles of sodium formate mus

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