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A. Consider a buffer solution that is 0.30M propionic acid and 0.40M sodium propionate. Ka (propionic...

A. Consider a buffer solution that is 0.30M propionic acid and 0.40M sodium propionate. Ka (propionic acid )=1.3x105

a. Calculate the [H+], {OH-] and pOH for this buffer

b. Calculate the pH of this buffer after adding 20ml of 2.0M NaOH to 1.0L of the solution (Hint: 1.0L + 20ml = 1.0L according to the rules of addition for significant figues)

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Homework Answers

Answer #1

a.

b.

1.0 L of buffer solution that is 0.30M propionic acid and 0.40M sodium propionate. It contains propionic acid and sodium propionate.

20 mL of 2.0 M NaOH is added.

Number of moles of NaOH

0.040 moles of NaOH will combine with 0.040 moles of propionic acid to form 0.040 moles of sodium propionate.

Number of moles of propionic acid .

Number of moles of sodium propionate

Since total volume is 1.0 L, the number of moles is equal to molarity

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