nZn=16,25/65=0,25(mol)
mHCl=150.14,6/100=21,9(g)
=>nHCl=21,9/36,5=0,6(mol)
Zn+2HCl--->ZnCl2+H2
1____2
0,25__0,6
Ta có: 0,25/1<0,6/2
=>HCl dư
mHCl dư=0,1.36,5=3,65(g)
Theo pt: ZnCl2=nZn=0,25(mol)
=>mZnCl2=0,25.136=34(g)
Theo pt: nH2=nZn=0,25(mol)
=>mH2=0,25.2=0,5(g)
mdd=16,25+150-0,5=165,75(g)
=>C%HCl dư
=>C%ZnCl2