A.0.01的盐酸,用pH试纸可测量其pH=2.0 |
B.用规格为50.00mL的碱式滴定管量取20.00mL氢氧化钠溶液时,将初始读数调整到30.00mL,然后将滴定管内剩余溶液全部放出即可 |
C.蒸干溶液可制备无水固体 |
D.实验室将晶体溶于较浓盐酸再加水稀释到所需浓度来配制该溶液,可抑制的水解 |
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