Răspuns:
1. a. Zn +H2SO4 =>ZnSO4 +H2
b. CaO+ 2HCl =>CaCl2 +H2O
c.. NaOH+HCl => NaCl +H2O
d. Ca(OH)2+H2SO4 => CaSO4 +H2O
e. CaO+2HNO3 =>Ca(NO3)2+H2O
2. ms=150g
C=10%
md=?
md=C×ms/100=150×100/10=1500gHCl
24 2×36,5
Mg+2HCl =>MgCl2 +H2
xg 1500g
MMg=24
MHCl=1+35,5=36,5
x=1500×24/2×36,5=calculează
