設(shè)參加反應(yīng)的CaCO3的質(zhì)量為x,鹽酸的溶質(zhì)質(zhì)量為y.
CaCO3+2HCl=CaCl2+H2O+CO2↑
100 73 44
x y 4.4g
100/x=44/4.4
73/y=44/4.3
x=10g
y=7.3g
鹽酸的溶質(zhì)質(zhì)量分數(shù)=7.3/50*100%=14.6%
答：1.參加反應(yīng)的CaCO3的質(zhì)量是10g.
2.鹽酸的溶質(zhì)質(zhì)量分數(shù)是14.6%生成的二氧化碳是2.2克啊 ，你怎么帶的是4.4克啊抱歉，腦袋短路了，帶錯數(shù)據(jù)了。下面的已經(jīng)修改了。設(shè)參加反應(yīng)的CaCO3的質(zhì)量為x，鹽酸的溶質(zhì)質(zhì)量為y。CaCO3+2HCl=CaCl2+H2O+CO2↑100 73 44xy 2.2g100/x=44/2.273/y=44/2.2x=5gy=3.65g鹽酸的溶質(zhì)質(zhì)量分數(shù)=3.65/50*100%=7.3%答：1.參加反應(yīng)的CaCO3的質(zhì)量是5g。2.鹽酸的溶質(zhì)質(zhì)量分數(shù)是7.3%