A gas sample is prepared in which the components have the following partial pressures: nitrogen, 555 mmHg; oxygen, 149 mmHg; wat
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This is an incomplete question, here is a complete question.
Calculate the pH of a solution made by adding 59 g of sodium acetate, NaCH₃COO, to 23 g of acetic acid, CH₃COOH, and dissolving in water to make 400. mL of solution. Hint given in feedback. The Ka for CH₃COOH is 1.8 x 10⁻⁵ M. As usual, report pH to 2 decimal places.
Answer : The pH of the solution is, 4.97
Explanation :
First we have to calculate the moles of CH₃COOH and NaCH₃COO
and,
Now we have to calculate the value of .
The expression used for the calculation of is,
Now put the value of in this expression, we get:
Now we have to calculate the pH of the solution.
Using Henderson Hesselbach equation :
Now put all the given values in this expression, we get:
(As the volume is same. So, we can write concentration in terms of moles.)
Therefore, the pH of the solution is, 4.97