Răspuns:
ms=500g
C=3,65%
md=?
md=500x3,65/100=18,25g HCl
MHCl=1+35,5=36,5g/mol
MCaCl2=40+2x35,5=111g/n4mol
MCO2=12+2x16=44g/mol
2x36,5g....111g.....44g
CaCO3 + 2HCl → CaCl2 + CO2↑ + H2O
18,25g....xg...........yg
x=18,25x111/2x36,5=calculeaza
y=18,25x44/2x36,5=calculeaza
Explicație: