Chemistry, 13.09.2019 22:30 grettelyesenia
How many grams of sodium fluoride should be added to 300. ml of 0.0310 m of hydrofluoric acid to produce a buffer solution with a ph of 2.60?
Answers: 3
.
in this expression, we get:
![pH=pK_a+\log \frac{[Salt]}{[Acid]}](/tpl/images/0230/3650/e961a.png)
![pH=pK_a+\log \frac{[NaF]}{[HF]}](/tpl/images/0230/3650/d68d8.png)
![2.60=3.17+\log (\frac{[NaF]}{0.0310})](/tpl/images/0230/3650/5c5bc.png)
![[NaF]=0.00834M](/tpl/images/0230/3650/cfdab.png)
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How many grams of sodium fluoride should be added to 300. ml of 0.0310 m of hydrofluoric acid to pro...
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