Zn +2HCl --> ZnCl2 +H2(1)
ZnO +2HCl --> ZnCl2 +H2O (2)
nH2=0,05(mol)
theo (1) : nZn=nH2=0,05(mol)
=>mZn=3,25(g)
=>%mZn=45,14(%)
=>%mZnO=54,86(%)
mZnO=3,95(g)
=>nZnO=0,049(mol)
theo (1) : nHCl=2nZn=0,1(mol)
(2) : nHCl=2nZnO=0,098(mol)
=>\(\Sigma\)nHCl=0,198(mol)
=> VHCl=0,198/4=0,0495(l)
ZnCl2 +2NaOH --> Zn(OH)2 +2NaCl (3)
theo (1) : nZnCl2=nZn=0,05(mol)
(2) : nZnCl2=nZnO=0,049(mol)
=> \(\Sigma\)nZnCl2=0,099(mol)
theo (3) : nNaOH=2nZnCl2=0,198(mol)
=>mNaOH=7,92(g)
nZn(OH)2=nZnCl2=0,099(mol)
=>mZn(OH)2=9,801(g)