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A．0.1mol•L-1PT溶液中：c(K+)＞c(HC2O )＞c(H2C2O4) |
| B．0.1mol•L-1PT中滴加NaOH至溶液pH=4.19：[c(Na+)-c(K+)]＜[c(HC2O)-c(H2C2O4)] |
C．0.1mol•L-1PT中滴加NaOH至溶液呈中性：c(K+)＞c(Na+)＞c(HC2O)＞c(C2O )] |
| D．0.1mol•L-1PT与0.3mol•L-1NaOH溶液等体积混合：c(Na+)-c(K+)=c(H2C2O4)+c(HC2O)+c(C2O) |
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
