A.c(NH4+)>c(Cl),c(OH)>c(H) | B.c(NH4+) = c(Cl),c(OH) = c(H) |
C.c(Cl)>c(NH4+),c(OH)>c(H) | D.c(Cl)>c(NH4+),c(H)>c(OH) |
A.NaOH | B.Na2CO3 | C.NH4Cl | D.NaCl |
A. c (OH–) > c (H+) |
B. c (CH3COOH) + c (CH3COO– ) = 0.2 mol/L |
C. c (CH3COOH)> c (CH3COO– ) |
D. c (CH3COO– )+ c (OH– ) = 0.2 mol/L |
溶质 | CH3COONa | NaHCO3 | Na2CO3 | NaClO | NaCN | Na2SO4 |
pH | 8.8 | 9.7 | 11.6 | 10.3 | 11.1 | 7.0 |
A.上述溶液中,将①和②等体积混合,其溶液中粒子浓度关系为 2c(Na+)=3c(HCO-3)+3c(CO2-3)+3c(H2CO3) |
B.上述四种溶液中,由水电离的c(OH-)的大小关系为:①>②>④>③ |
C.上述四种溶液中,分别加水稀释,所得溶液中c(H+).c(OH-)的数值不变 |
D.上述四种溶液中,分别加入少量的NaOH固体,此时溶液的pH均增大 |
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