一、单选题(共22题)
1.下列说法中正确的是
A. NH4HCO3溶液中存在:
B.常温下pH=12的NaOH溶液,升高温度,其pH增大
C.强酸的水溶液中不存在
D.相同pH的氨水和NaOH的溶液中,
2.室温下,下列溶液中粒子浓度关系正确的是
A.Na2S溶液:c(Na+)>c(HS-)>c(OH-)>c(H2S)
B.Na2CO3溶液: c(OH-)=c(H+)+c(
)+c(H2CO3)
C.Na2CO3溶液:c(Na+)+c(H+)=2c(
)+c(OH-)
D.0.1mol/L的NaHCO3溶液中:c(Na+)>c(
)>c(OH-)>c(H+)>c(
)