A.等物质的量浓度的各溶液pH关系为:pH(CH3COONa)>pH(NaHCO3)>pH(Na2CO3) |
B.0.1mo/L的Na2CO3溶液中:c(OH-)=c(HCO)+c(H+)+c(H2CO3) |
C.常温下,pH=l1NaOH溶液与pH=3CH3COOH溶液等体积混合:c(Na+)>c(CH3COO-)>c(H+)>c(OH-) |
D.c(NH)相等的(NH4)2SO4溶液、NH4HSO4溶液、(NH4)2CO3溶液和NH4Cl溶液中:c[(NH4)2SO4]<c[(NH4)2CO3]<c(NH4HSO4)<c(NH4Cl) |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2