Răspuns:
2Mg + O2---> 2MgO combinare
MgO+H2SO4-> MgSO4 +H2O dubla inlocuire
Mg + H2SO4---> MgSO4 + H2 substitutie
Mg + 2H2O---> Mg(OH)2 +H2 SUBSTITUTIE
Mg(OH)2 + H2SO4----> MgSO4 + 2H2O dubla inlocuire
c=mdx100/ms---> md=15x150/100g=2,25gMgSO4
M,MgSO4=120g/mol M,Mg=24g/mol
1mol Mg............1molMgSO4
24g...............................120g
x...................................2,25g
x=0,45g MgPUR
P=90%=m,px100/m,i----> m,i= 0,45X100/90g=0,5g mG
Explicație:
