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85问答库 > 实验室用含碳酸钙20g的大理石与100g的稀盐酸恰好反应，生成二氧化碳多少g？______稀盐酸的溶质质量分数是

实验室用含碳酸钙20g的大理石与100g的稀盐酸恰好反应，生成二氧化碳多少g？______稀盐酸的溶质质量分数是

2025-04-08 10:59:02

推荐回答（1个）

回答1：

设生成二氧化碳的质量为x，稀盐酸中HCl的质量为y
CaCO₃+2HCl═CaCl₂+H₂O+CO₂↑
100 73 44
20g y x

100

20g

=

73

y

=

44

x

x=8.8g，y=14.6g
稀盐酸的溶质质量分数=

14.6g

100g

×100%=14.6%
故答案为：8.8g；14.6%．

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