某化学兴趣小组,利用如图所示装置可以验证非金属性的变 化规律

某化学兴趣小组,利用如图所示装置可以验证非金属性的变

化规律。

1)仪器A的名称为________________

干燥管D的作用是_______________________

2C  Si  S的非金属性由强到弱的顺序是______________

3)实验室中现有药品  稀盐酸、稀硫酸 Na2SiO3溶液

以及 Na2 CO3Ca CO3固体,请选择合适药品设计实验,验证C  Si  S的非金属性的变化规律;装置ABC中所装药品分别为______________________________,写出B中反应的离子方程式为____________________________________________________观察到C中溶液的现象为_________________________________

答案

1)分液漏斗 防止倒吸 

(2)S>C>Si

(3) 硫酸   Na2 CO3 Na2SiO3   CO322H+===CO2↑+2H2O 有白色胶状沉淀产生

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