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.

The more the total concentration of a buffer, the more its buffer capacity at 298K. A: 正确 B: 错误

(4)Buffer capacity does not represent the ability of a buffer to resist changes in pH. A: 正确 B: 错误

The larger the value of β，the greater the capacity of the buffer to resist changes in pH.

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

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

下列程序代码运行结果是：（ ）。StringBuffer buffer=new StringBuffer(); System.out.println(buffer.length()+" "+buffer.capacity()); A: 0 0 B: 0 16 C: 16 16 D: 16 0

(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

以下有关Buffer常用方法,描述错误的是() A: Buffer clear():清除缓冲区,将position设置为0,limit设置为capacity B: Buffer flip():反转缓冲区,先将limit设置为当前position位置,然后再将position设置为0 C: Buffer mark():获取Buffer的标记(mark), D: Buffer rewind():倒带缓冲区,将position设置为0,并取消设置的标记