A: pH= pKa±1
B: The buffer ratio is between 0.1 and 10
C: Large buffer capacity
D: High total concentration
举一反三
- (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
- The more the total concentration of a buffer, the more its buffer capacity at 298K.
- The more the total concentration of a buffer, the more its buffer capacity at 298K. A: 正确 B: 错误
- 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
- A buffer solution must contain a relatively large concentration of acid and a similar concentration of base.
内容
- 0
Which<br/>of the following buffer solutions have the largest buffer capacity? ( ) A: 1L 0.1 M HAc solution + 1L 0.2 M NaAc solution B: 1L 0.15 M HAc solution + 1L 0.15 M NaAc solution C: 1L 0.1 M HAc solution + 1L 0.1 M NaAc solution D: 1L 0.2 M HAc solution +1L 0.1 M NaAc solution
- 1
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
- 2
(4)Buffer capacity does not represent the ability of a buffer to resist changes in pH.
- 3
代码： 以下正确的说法是：（） A: buffer中所有的元素都具有初始值2。 B: buffer[1]、buffer[2]、buffer[3]的初始值是随机的。 C: buffer[1]、buffer[2]、buffer[3]的初始值是确定的，为0。 D: buffer[1]、buffer[2]、buffer[3]的初始值是确定的，但可能随编译器实现而变化。
- 4
(4)Buffer capacity does not represent the ability of a buffer to resist changes in pH. A: 正确 B: 错误