A.在a点的溶液中,c(H2CO3)-c(CO)> c(OH-)-c(C1-) |
B.在b点的溶液中,2n(H2CO3)+ n(HCO)<0.002 mol |
C.煮沸目的是除去CO2,使突跃变大,冷却后继续滴定到终点 |
D.若将0.10mol·L-1的盐酸换成同浓度的醋酸,当滴至溶液的pH=7时: c(Na+)=c(CH3COO-) |
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