Calculate the volume of 1.00 M acetic acid solution and mass ofsodium acetate needed to make 250 mL of a 0.450 M aceticacid/acetate buffer solution with a pH of 4.00. (The pKa is 4.74for acetic acid)

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Deanna HettingerLv2

2 May 2019

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How many mL of 0.2 M sodium acetate should be added to 200 mL of0.1 M acetic acid to make a buffer of pH 5? What will the totalconcentration of acetate be in this solution (acetate + aceticacid)?

Acetic acid has a pKa of 4.8. How many milliliters of 0.2 M acetic acid and 0.2 M sodium acetate are required to prepare 1 liter of 0.1 M buffer solution having a pH of 4.8?

Select One:

a. 500 mL acetic acid and 500 mL sodium acetate

b. 250 mL acetic acid and 500 mL sodium acetate, then 250 mL water

c. 250 mL acetic acid and 250 mL sodium acetate, then 500 mL water

d. 500 mL acetic acid and 250 mL sodium acetate, then 250 mL water

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If I want to make the buffer by adding 0.100 M NaOH instead ofsodium acetate, how many milliliters of NaOH are needed to reachpH=4.74

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