下列说法正确的的是
A.图中甲、丁线表示向NaHCO3溶液中滴加盐酸,乙、丙线表示向Na2CO3溶液中滴加盐酸 |
B.当滴加盐酸的体积为V1mL时(a点、b点),所发生的反应用离子方程式表示为:HCO+H+=CO2↑+H2O |
C.根据pH—V(HCl)图,滴定分析时,c点可用酚酞、d点可用甲基橙作指示剂指示滴定终点 |
D.Na2CO3和NaHCO3溶液中均满足:c(H2CO3)-c(CO)=c(OH-)-c(H+) |
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