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重量分析法　自测题

 

1．重量法通常分为那几类？测定步骤分别是怎样的？

2．影响沉淀溶解度的因素有哪些？

3．比较晶形沉淀和非晶形沉淀的沉淀条件有何异同点？

4．重量分析法中，为什么BaSO4沉淀需陈化，而Fe(OH)3沉淀不能陈化？

5．均匀沉淀法有何优点？

6．将固体AgCl，AgBr放入50mL水中，搅拌至平衡状态，求溶液中Ag+ 的浓度。

7．灼烧过的BaSO4沉淀为0.5013g，其中有少量BaS，用H2SO4润湿，过量的H2SO4蒸发除去，再灼烧，称得沉淀的质量为0.5021g，求BaSO4中BaS的质量分数。
 

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