1)A buffer solution was prepared by dissolving 3.95 g of sodium nitrite, NaNO2, in 150 mL of 0.200 M nitrous acid, HNO2. (Ka = 4.5 x 10-5). What is the pH of the buffer?
2)
Consider a buffer CH3COOH/CH3COO–. Fill in the blank using the numbers corresponding to each species.
|
CH3COOH |
CH3COO– |
OH– |
H+ |
Na+ |
H2O |
|
1 |
2 |
3 |
4 |
5 |
6 |
Please note that choices can be used more than once.
The basic component of the buffer is . The acidic component of the buffer is . The reactants of the reaction that occurs when a small amount of sodium hydroxide (NaOH) is added to the buffer solution are and . The products of the reaction that occurs when a small amount of NaOH is added to the buffer solution are and .
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