A.1∶60 | B.3∶1 | C.100∶1 | D.1∶100 |
A.[Na+]>[Cl-]>[OH-]>[H+] | B.[Na+]=[Cl-]>[OH-]>[H+] |
C.[Na+]=[Cl-]>[H+]>[OH-] | D.[Na+]>[Cl-]>[OH-]>[H+] |
A.[CH3COO-] = [Cl-] = [H+] > [CH3COOH] |
B.[CH3COO-] = [[Cl-] > [CH3COO-] > [H+] |
C.[CH3COO-] > [Cl-] > [H+] > [ CH3COOH] |
D.[CH3COO-] > [Cl-] > [ CH3COOH] > [H+] |
A.25℃时pH=5的盐酸与pH=9的氨水中水的电离程度一定相同 |
B.pH=5的硫酸溶液稀释到原来的500倍,稀释后c(SO42-)与c(H+)之比约为1:10 |
C.0.1mol/L的Na2S溶液中粒子浓度关系:c(OH-)= c(HS-)+ c(H2S) +c(H+) |
D.已知NaOH(aq)+HCl(aq)=NaCl(aq)+H2O(l);△H=-57.4 kJ· mol-1则含20.0g NaOH的稀溶液与稀醋酸完全中和,放出的热量小于28.7kJ |
A.溶液中2c(Na+)=c(SO42-) | B.a/2 mol>沉淀的物质的量>0 |
C.沉淀的物质的量=" a/2" mol | D.原溶液中c(H2SO4) =" a/2" mol/L |
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