Răspuns:
Explicație:
18,25g xg
Na2CO3 +2 HCl = 2NaCl + CO2 + H2O
2.36,5g 44g
x=18,25 .44 : 2 .36,5=11 g CO2
n=m:M n=nr.moli
n=11g : 44 g/moli=0,25 moli CO2
ms HCl =md.100 : c
ms=18,25 .100 :30=60,83 g sol. HCl
MHCl=1+35,5=36,5------>36,5g/moli
MCO2=12+2.16=44----->44g/moli
