A.1.7 | B.2.0 | C.12.0 | D.12.4 |
A.此时水的离子积KW=1.0×10-14 | B.水电离出的c(H+)=1.0×10-10mol/L |
C.水的电离度随温度升高而升高 | D.c(H3O+)>c(SO42-) |
A.若混合溶液的pH=7,则c1V1>c2V2 |
B.若V1=V2,c1=c2,则溶液中c (NH4+) =c (Cl-) |
C.若混合溶液的pH=7,则溶液中c (NH4+)>c (Cl-) |
D.若V1=V2,且混合液的pH<7,则可能有c1 = c2 |
A.CO(g) +1/2O2(g) ==CO2(g); △H=-283.0 kJ/mol |
B.C(s) +1/2O2(g) ="=CO(g);" △H=-110.5 kJ/mol |
C.H2(g) +1/2O2(g)==H2O(g); △H=-241.8 kJ/mol |
D.2C8H18(l) +25O2(g)==16CO2(g)+18H2O(l); △H=-11036 kJ/mol |
A.1×10-3mol/L | B.1×10-7mol/L |
C.1×10-11mol/L | D.1×10-14mol/L |
A.pH = 2的硫酸 | B.pH = 2的醋酸 | C.0.01 mol/L甲酸 | D.0.01 mol/L硝酸 |
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