正确答案：

8、影响缓冲容量的主要因素是

A.缓冲溶液的pH值和缓冲比

B.弱酸的pKa和缓冲比

C.弱酸的pKa和缓冲溶液的总浓度

D.缓冲溶液的总浓度和缓冲比

正确答案：缓冲溶液的总浓度和缓冲比

9、人体血浆中最重要的抗酸成分是

A.

B.

C.

D.

正确答案：

10、下列有关缓冲溶液的叙述中,错误的是

A.总浓度一定时,缓冲比为1时,β值最大

B.缓冲对的总浓度越大，β越大

C.缓冲溶液稀释后,缓冲比不变,所以pH不变,β也不变

D.缓冲容量β越大,溶液的缓冲能力越强

正确答案：缓冲溶液稀释后,缓冲比不变,所以pH不变,β也不变

第七章单元测试

1、The number of carbon atoms in the following drawing is 5.

A.对

B.错

正确答案：对

2、The number of carbon atoms in the following drawing is ( )

A.4

B.6

C.5

D.7

正确答案：5

3、neutral carbon atoms always have a total of four bonds

A.对

B.错

正确答案：对

4、carbon atoms in a straight chain are drawn in a zigzag format

A.对

B.错

正确答案：对

5、

A.对

B.错

正确答案：对

6、The nitrogen atom in the compound below has a positive charge:

A.对

B.错

正确答案：对

7、

This reaction undergoes an elimination process.A.对

B.错

正确答案：错

8、For the following reaction, clearly state what change has taken place

A.added two H

B.eliminated two H

C.eliminated one C

D.substituted by two H

正确答案：eliminated two H

9、In bond-line drawings, we don't draw any H’s that are connected to atomsother than carbon.A.对