Răspuns:
M,HCl=36,5g/mol
M,NaCl= 58,5g/mol
M,H2SO4=98g/mol
98g.............2x58,5g,,,,,,,,,,,,,,,,,,,,,,2x36,5g
H2SO4 + 2NaCl----> Na2SO4 +2HCl
x.....................y......................................7,3g
x= 9,8gH2SO4=md
y=11,7gNaCl
c= mdx100/ms---> ms= 9,8x100/49 g=20g solutie H2SO4
Explicație: