A.由图可推知:25℃,0.1 mol/L NaR溶液的pH约为10 |
B.当通入0.1 mol NH3时,所得溶液中:c(NH4+)>c(R-)>c(OH-)>c(H+) |
C.pH=7时,所得溶液中:c(HR)>c(R-) =c(NH4+) |
D.pH=10时,所得溶液中:c(R-)>c(HR) ,c(NH4+)>c(NH3·H2O) |
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