Question

can I get help with 3 and 4

3. A buffer solution contains 0.50 M acetic acid and 0.50 sodium acetate. Calculate the pH of this solution. (2 pts) 4. What is the pH of 2.00mL of 1,0 M HCI solution diluted to 50.0 mL? ( 2pts) Page 1 of

Answer 1

3.

For acetic acid, pKa is 4.74

acetic acid ] = sodium acetate = 0.50 M

When concentration of weak acid is same as the concentration of salt, then for the acid buffer solution

pH = pka = 4.74

4.

[H+] = [HCI) = 1.0 mmol/mL x 2.00 mL 50,0 mL

W 100 = 10H] = [+H]

pH = -log10[H+] = -log100.04 M = 1.398 M