Răspuns:
M,CaCO3=100mol/l
p=m,px100/m,i----> m,pur=250x70/100g=175gCaCO3
niu=m/M= 175/100 mol= 1,75mol
1mol............2mol
CaCO3+ 2HCl---> CaCl2 +CO2+H2O
1,75mol........x
x=niu=3,5molHCl
c,m= niu/V-----> V= niu/c= 3,5mol/1,5mol/l= 2,33 l
Explicație: