Question

,取145毫升稀盐酸(密度为1.10克/厘米3),跟53克含少量杂质的石灰石恰好完全反应(其中杂质不与稀盐酸反应,不

Answer 1

2HCl+CaCO3 = CaCl2 + H2O+CO2

73 100 111 44

x y z 19.8

x = 32.85g y=45g z=49.95g

1) =32.85/(1.10*145) *100% = 20.6%

2) = 45/53 *100% = 84.9%

3) =49.95/(1.10*145+53-19.8) *100% = 25.9%