(1)图中P点表示的含义是
(2)在保持一定温度的条件下,将硝酸钾的不饱和溶液转化为饱和溶液,可采用的方法有
(3)40℃时,将硝酸钾和氯化钠的饱和溶液同时降低温到10℃,此时两种溶液中溶质的质量分数的大小关系是:硝酸钾
(4)若接近饱和的氯化钠溶液中混有少量的硝酸钾,可采用
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