DATA TABLE Buffer A Buffer B Mass of NaC2H3O2 used to prepare buffer (g) 0.149 g...

Question

Question

DATA TABLE

	Buffer A	Buffer B
Mass of NaC₂H₃O₂ used to prepare buffer (g)	0.149 g	1.49 g
Volume of buffer prepared (mL)	100.0	100.0
Molar concentration of HC₂H₃O₂ in buffer (M)	0.1	1.0
Initial pH of buffer	4.24	4.33
Volume of 0.5 M NaOH to raise pH by 2 units (mL)	1.5	19.0
Volume of 0.5 M HCl to lower pH by 2 units (mL)	1.0	5.0
Volume of 0.5 M NaOH at equivalence point (mL)	1.75	19.75

3. Say, for example, that you had prepared a Buffer C, in which you mixed 8.203 g of sodium acetate, NaC₂H₃O₂, with 100.0 mL of 1.0 M acetic acid.

a. What would be the initial pH of Buffer C?

b. If you add 5.0 mL of 0.5 M NaOH solution to 20.0 mL each of Buffer B and Buffer C, which buffer’s pH would change less? Explain.

Answer 1

Answer #1

Answer 2

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