(1)t1℃时,A、B、C三种物质的饱和溶液,溶质质量分数由大到小的顺序是
(2)若B中混有少量A可用
(3)t3℃时向25g A物质中加入60g水,形成的溶液是
(4)将t3℃时A、B、C三种物质的饱和溶液降温到t1℃,析出晶体最多的是
①A
②B
③C
④无法确定
(5)欲将t3℃时A的饱和溶液30g,稀释为10%的溶液需加水
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