选项 | 加入的物质 | 对所得溶液的分析 |
A | 90 mL H2O | 由水电离出的c(H+)=10-10 mol·L-1 |
B | 0.1 mol CH3COONa固体 | c(OH-)增大 |
C | 10 mL pH=1的H2SO4溶液 | CH3COOH的电离程度增大 |
D | 10 mL pH=11的NaOH溶液 | c(Na+)=c(CH3COO-)>c(OH-)=c(H+) |
A.A | B.B | C.C | D.D |
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