(1)配制一瓶如图所示溶液需氯化钠_____g.
(2)配制一定质量分数的氯化钠溶液时,下列哪些操作会导致溶液的质量分数偏小______?请说明偏小的原因________________________。
①用量筒量取水时仰视读数;
②往烧杯中加水时有水溅出;
③称量含不溶性杂质的氯化钠来配制溶液;
④将配制好的溶液往试剂瓶中转移时有少量溅出.
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