Calculate the percent ionization of formic acid solutions having the following concentrations. a) 1.20mb)0.450mc)0.130md)5.10 x 10^-2

a). 1.22%

b). 2%

c). 3.72%

d). 5.94%

Given:

Ka for formic acid, HCOOH, is

Question:

Calculate the percent ionization (α) of formic acid solutions having the following concentrations (M).

The Process:

Remember that,

and

The two equations are rearranged to connect α, Ka, and M directly.

Let us calculate the percent ionization from each concentration below.

a). 1.20 M

Thus, the percent of ionization for 1.20 M HCOOH solution is 1.22%.

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b). 0.450 M

Thus, the percent of ionization for 0.450 M HCOOH solution is 2%.

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c). 0.130 M

Thus, the percent of ionization for 0.130 M HCOOH solution is 3.72%

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d). 5.10 x 10⁻² M

Thus, the percent of ionization for 5.10 x 10⁻² M HCOOH solution is 5.94%.

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Notes

Just a reminder, Ka and α are characteristic of weak acid solutions.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.