试题与答案

某同学为测定某钙片其碳酸钙的含量标注(一片片剂质量2.5g,一片钙片中碳酸钙的含

题型:问答题

题目:

某同学为测定某钙片其碳酸钙的含量标注(一片片剂质量2.5g,一片钙片中碳酸钙的含量标注≥1.24g)是否属实,他取出4片片剂,研碎后放入烧杯中,逐滴加入稀盐酸,至不再放出气体为止,共用去稀盐酸36.5g,称量烧杯中剩余物质量为44.3g(不含烧杯质量,假定钙片其它成分不与盐酸反应.)

(1)生成二氧化碳的质量.

(2)稀盐酸中溶质的质量分数.

(3)通过计算判断钙片中碳酸钙的含量标注是否属实.

答案:

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