A. | B. | C.1s22s22p6 | D.K+ |
A.c(OH一)>c(H+)时,a=b | B.c(K+)>c(CH3COO—)时,a>b |
C.c(OH一)=c(H+)时,a>b | D.c(K+)<c(CH3COO—)时,a<b |
A.1:9 | B.1:1 | C.2:9 | D.1:2 |
A.pH<7的溶液 | B.c(H+)>c(OH—) 的溶液 |
C.pH>7的溶液 | D.c(H+)<c(OH—) 的溶液 |
A.NH4Cl | B.NaOH | C.NaCl | D.H2SO4 |
A.溶液中离子浓度可能满足:c(Na+)>c(OH-) >c(H+)>c(CH3COO-) |
B.溶液中离子浓度一定满足:c(Na+)= c(CH3COO H)+ c(CH3COO-) |
C.向溶液中加入适量醋酸,离子浓度可能满足:c(CH3COO-)=c(Na+)>c(H+)=c(OH-) |
D.该溶液可能由pH=11的NaOH溶液和pH=3的醋酸溶液等体积混合而成(常温时醋酸的电离常数为1.75×10-5) |
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