A.同温度同物质的量浓度时,HF比HCN易电离,NaF溶液的pH比NaCN溶液大 |
B.0.2 mol•L﹣1NH4Cl和0.1 mol•L﹣1 NaOH溶液等体积混合后:c(NH)>c(Cl﹣)>c(Na+)>c(OH﹣)>c(H+) |
C.同浓度的下列溶液中,①NH4Al(SO4)2、②NH4Cl、③CH3COONH4、④NH3•H2O;c(NH)由大到小的顺序是:①>②>③>④ |
D.物质的量浓度相等的H2S和NaHS混合溶液中:c(Na+)+c(H+)=c(S2﹣)+c(HS﹣)+c(OH﹣) |
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