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【简答题】以0.020mol·L -1 EDTA滴定浓度均为0.020mol·L -1 Pb 2+ 和Ca 2+ 混合溶液中的Pb 2+ ，终点时pH=5.0的HAc-Ac - 缓冲溶液，c(Ac - )为0.1mol·L -1 。若以二甲酚橙为指示剂，计算化学计量点时的pPb' sp 、p CaY 和终点误差。(lgK PbY =18.04，lgK CaY =10.7；pH=5.0时，lgα Y(H) =...
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【单选题】Tom, turn down the music. Why _____ you make such a big noise while your baby sister is sleeping? [     ]
A.
must
B.
would
C.
should
D.
may
查看完整题目与答案
【单选题】—Tom, why don't you do your homework in your room? —I _____it already. [     ]
A.
did
B.
have done
C.
do
D.
will do
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【单选题】Why does Jane refuse Tom's invitation?
A.
Because she wants to study for a test.
B.
Because she wants to go swimming at the student center.
C.
Because she has to do research in the library.
D.
Because she is not interested in the man.
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【判断题】25℃时，0.1mol.L-1HAc的α= 1.33%，表示在该溶液中每10000个HAc分子有约133个 HAc分子解离成H+ 和Ac-
A.
正确
B.
错误
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【单选题】Why,Tom, didn't you get your bike ? [     ]
A.
mend
B.
to mend
C.
mending
D.
mended
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【单选题】在 50mL0.1 mol ·L -1 HAc溶液中加入等体积水稀释,对稀释后的水溶液而言,下列叙述正确的是 A B C D
A.
HAc 的解离度 α 减小，溶液的 pH 值减小
B.
HAc 的解离度 α 增大，溶液的 pH 值增大
C.
HAc 的解离度 α 增大，溶液的 pH 值减小
D.
HAc 的解离度 α 增大， HAc 的解离常数增大
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【单选题】1mol·L -1 HAc,α HAc =1.33%,则在此溶液中微粒浓度最大的是
A.
H +
B.
Ac -
C.
OH -
D.
HAc
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【单选题】Tom, turn down the music. Why ____ you make such a big noise while your baby sister is sleeping? [     ]
A.
could
B.
would
C.
should
D.
must
查看完整题目与答案
【单选题】1mol/lHAc 溶液中 HAc 的 α = 1.33%, 则 [H+] 为( ) mol/l.
A.
1.3 3×10 -3
B.
1.33×10 -2
C.
1.33×10 -1
D.
1.33
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相关题目：
【简答题】以0.020mol·L -1 EDTA滴定浓度均为0.020mol·L -1 Pb 2+ 和Ca 2+ 混合溶液中的Pb 2+ ，终点时pH=5.0的HAc-Ac - 缓冲溶液，c(Ac - )为0.1mol·L -1 。若以二甲酚橙为指示剂，计算化学计量点时的pPb' sp 、p CaY 和终点误差。(lgK PbY =18.04，lgK CaY =10.7；pH=5.0时，lgα Y(H) =...
查看完整题目与答案
【单选题】Tom, turn down the music. Why _____ you make such a big noise while your baby sister is sleeping? [     ]
A.
must
B.
would
C.
should
D.
may
查看完整题目与答案
【单选题】—Tom, why don't you do your homework in your room? —I _____it already. [     ]
A.
did
B.
have done
C.
do
D.
will do
查看完整题目与答案
【单选题】Why does Jane refuse Tom's invitation?
A.
Because she wants to study for a test.
B.
Because she wants to go swimming at the student center.
C.
Because she has to do research in the library.
D.
Because she is not interested in the man.
查看完整题目与答案
【判断题】25℃时，0.1mol.L-1HAc的α= 1.33%，表示在该溶液中每10000个HAc分子有约133个 HAc分子解离成H+ 和Ac-
A.
正确
B.
错误
查看完整题目与答案
【单选题】Why,Tom, didn't you get your bike ? [     ]
A.
mend
B.
to mend
C.
mending
D.
mended
查看完整题目与答案
【单选题】在 50mL0.1 mol ·L -1 HAc溶液中加入等体积水稀释,对稀释后的水溶液而言,下列叙述正确的是 A B C D
A.
HAc 的解离度 α 减小，溶液的 pH 值减小
B.
HAc 的解离度 α 增大，溶液的 pH 值增大
C.
HAc 的解离度 α 增大，溶液的 pH 值减小
D.
HAc 的解离度 α 增大， HAc 的解离常数增大
查看完整题目与答案
【单选题】1mol·L -1 HAc,α HAc =1.33%,则在此溶液中微粒浓度最大的是
A.
H +
B.
Ac -
C.
OH -
D.
HAc
查看完整题目与答案
【单选题】Tom, turn down the music. Why ____ you make such a big noise while your baby sister is sleeping? [     ]
A.
could
B.
would
C.
should
D.
must
查看完整题目与答案
【单选题】1mol/lHAc 溶液中 HAc 的 α = 1.33%, 则 [H+] 为( ) mol/l.
A.
1.3 3×10 -3
B.
1.33×10 -2
C.
1.33×10 -1
D.
1.33
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