(1)A的浓溶液可用作_____剂,其稀溶液可用作鉴别假黄金(铜锌合金),写出其鉴别原理的化学方程式_____;
(2)B的俗称是_____,当A、B溶液混合后,滴加_____(填酸碱指示剂名称),C溶液显蓝色;
(3)往C溶液中继续滴加一定量的A溶液,使溶液的pH=7,其原因是_____(用化学方程式表示);
(4)用A、B溶液进行实验操作时,要戴上护目镜等,其原因是_____(从物质的性质角度回答).
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