What is the pH of a buffer with the largest buffer capacity when the buffer is composed of NH3 (Kb = [img=80x24]1803a221c94490b.png[/img]) and HCl?
A: 5
B: 6
C: 8
D: 9
A: 5
B: 6
C: 8
D: 9
举一反三
- TheKaof the conjugate acid in a buffer solution is 1.0×10-6, it is theoretically inferred that the effective buffer range of the buffer solution is A: 6~8 B: 7~9 C: 5~7 D: 5~6
- (3)Choose the factors that can not determine the capacity of a buffer from the following a. pH of the buffer b. Concentration of buffer-component reservoirsc. Buffer-component ratio d. Buffer range A: a B: b C: c D: d
- Regarding the determination of the effective buffer range of the buffer solution, which of the following is not the factor we should consider A: pH= pKa±1 B: The buffer ratio is between 0.1 and 10 C: Large buffer capacity D: High total concentration
- The more the total concentration of a buffer, the more its buffer capacity at 298K.
- (4)Buffer capacity does not represent the ability of a buffer to resist changes in pH.