Răspuns:
Explicație:
234g NaCl
r. cu o sol. H2SO4 , 98%
ms H2SO4
masa de HCl
234g xg yg
2NaCl + H2SO4= Na2SO4 + 2HCl
2.58,5g 98g 2.36,5g
x= 234 . 98 : 117=196 g H2SO4-------> md
ms= md.100 m:c
ms= 196 . 100 : 98=200 g sol. H2SO4
Y=234 . 73 : 117= 146 g HCl
n= 146g : 36,5g/moli=4 moli HCl
MH2SO4 =2+32 +4.16=98------->98g/moli
MHCl= 1+35,5=36,5------> 36,5g/moli
MNaCl = 23 +35,5=58,5-------> 58,5 g/moli