Hello, I need help with the following question: How many grams (g) of formic acid (HCHO2) would you need to make a 555 mL solution with a pH of 2.25? (Ka = 1.7 x 10-4) Thanks.
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Hello, I need help with the following question:
How many grams (g) of formic acid (HCHO2) would you need to make a 555 mL solution with a pH of 2.25? (Ka = 1.7 x 10-4)
Thanks.
Given :
pH = 2.25
Ka = 1.7 x 10-4
Volume = 555mL or 0.555L
Grams = ?
To Calculate the desired [H3O+]:
![pH
mol/L
H0*]-10
102 25 mol L
=5.6x10mol L](https://content.bartleby.com/qna-images/answer/18982855-bf74-4370-9418-b210419f72d2/2ec8f303-3dcb-4851-bdef-1a70246dfcec/ycjcvh.png)
To calculate the concentration of formic acid, use ICE table and its its equilibrium equation:
The equilibrium equation:
![Гн,о" ТА])
Ка 3
THА]
x2
- 1.7 x10
с -х](https://content.bartleby.com/qna-images/answer/18982855-bf74-4370-9418-b210419f72d2/2ec8f303-3dcb-4851-bdef-1a70246dfcec/df3lr1m.png)
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