Answer:
- Exceed the buffer capacity
- Raise the pH by several units
Explanation:
Will:
(Assume that the volume does not change upon the addition of hydrobromic acid.)
Raise the pH slightly
Lower the pH slightly
Raise the pH by several units
Lower the pH by several units
Not change the pH
Exceed the buffer capacity
1L of a buffer of 0.384M acetic acid and 0.512M of sodium acetate contains 0.384 moles of the acid and 0.512 moles of the salt.
A base as Ca(OH)2 reacts with the acid, CH3COOH as follows:
Ca(OH)2 + 2CH3COOH → Ca(CH3COO)₂ + 2 H2O
For the reaction of the 0.422 moles of calcium hydroxide are required:
0.422 moles Ca(OH)2 * (2 moles CH3COOH / 1 mole Ca(OH)2) = 0.844 moles of CH3COOH
As there are just 0.384 moles of acetic acid:
Exceed the buffer capacity
And:
Raise the pH by several units
-Because the solution becomes more basic-
