Question

DATA AND CALCULATION

Preparation and Base Buffer Capacity of Buffer A

Mass of sodium acetate used	0.3730g
Actual pH of the buffer	5.27
Volume of the buffer used in buffer capacity titration	20.0 mL
Volume (mL) of standardized NaOH used to change the pH by 1 unit	17.5 mL
Concentration of standardized NaOH	0.100M
Moles of NaOH needed to change the pH by 1 unit for the buffer	0.00095 mol
The buffer capacity as moles of base per Liter buffer	0.0475 M

Show your calculation in your lab report:

1. Shaw your calculation of the mass of sodium acetate needed to prepare 50.0 mL of an acetic acid/sodium acetate buffer having a pH of 5.0 using 0.100 M acetic acid. For acetic acid K_a = 1.8 × 10^-5.
2. Show your calculation of the moles of NaOH needed to change the pH by 1 unit for the buffer.

3. Show your calculation of the buffer capacity as moles of base per Liter buffer

Answer 1