下列有关电解质溶液中微粒的物质的量浓度关系不正确的是[ ] A.在0.1 mol

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问题:

下列有关电解质溶液中微粒的物质的量浓度关系不正确的是[ ]

A.在0.1 mol.L-1NaHCO3溶液中:c(Na+)>c(HCO3-)>c(H2CO3)>c(CO32-)

B.在0.1 mol.L-1Na2CO3溶液中:c(OH -)-c(H+)=c(HCO3-)+2c(H2CO3)

C.向0.2 mol.L-1NaHCO3溶液中加入等体积0.1 mol.L-1NaOH溶液:c(CO32-)>c(HCO3-)> c(OH-)>c(H+)

D.常温下,pH =7的CH3 COONa和CH3 COOH的混合溶液:c(Na+)=c(CH3COO -)>c(H+) =c(OH -)

考点:粒子浓度大小的比较
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单词拼写。

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5. He promised to _____ (通知) me of the time of the meeting.

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7. U_____ finishing his homework, he went to play football with his classmates.

8. Smoking is strictly f_____ in public places in China.

9. We thought you could act like an a_____ , but look at the mess!

10. Going to a Britain high school for one year was a very e_____ and exciting experience for me.

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下列分子式表示一定是纯净物的是(   )

A.C5H10

B.C7H8O

C.CH4O

D.C2H4Cl2

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A.人民当家作主

B.无产阶级专政

C.全体人民享有管理政治的权力

D.生产资料公有制

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