结合硝酸钾在不同温度下的溶解度,判断下列说法不正确的是
温度/℃ | 10 | 20 | 30 | 40 | 50 | 60 |
KNO3溶解度/g | 20.9 | 31.6 | 45.8 | 63.9 | 85.5 | 110.0 |
A.①③中的溶液均为不饱和溶液 | B.②③中溶液的质量:③>② |
C.②③④中溶液的溶质质量分数:③>②>④ | D.④中析出晶体的质量是0.9g |
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