100g*7.3%=7.3g
Fe + 2HCl === FeCl2 + H2↑
56 73 127 2
x 7.3g y z
56/x=73/7.3g=127/y=2/z
x=5.6g
y=12.7g
z=0.2g
所得溶液的溶质质量分数 12.7g/(5.6g+100g-0.2g)*100%=12.05%
100g*7.3%=7.3g
Fe + 2HCl === FeCl2 + H2↑
56 73 127 2
x 7.3g y z
56/x=73/7.3g=127/y=2/z
x=5.6g
y=12.7g
z=0.2g
所得溶液的溶质质量分数 12.7g/(5.6g+100g-0.2g)*100%=12.05%