Răspuns:
Explicație:
a)CaCO3=CaO+CO2
CaO+2H2O=Ca(OH)2+H2
Ca(OH)2 +2HCl =CaCl2+2H2O
Ca(OH)2+H2SO4=CaSO4+2H2O
b) mCaCO3=500 g
p=80 %
CaCO3=CaO+CO2
M CaCO3=40+12+3*16=100g/mol
MCaO=40+16=56 g/mol
p=m p/m imp*100=
mp= p*m imp/100=80 *500/100=400 g
100 g ........56 g
400 g x
x=400*56/100= =224 g