Question

Calculati concentratia procentuala masica a unei solutii care se obtine prim dizolvarea a 4 moli de acid clorhidric im 73 mol de apa

Answer 1

M,HCl= 36,5g/mol
m=n(niu)xM--->    m= 4molx36,5g/mol=146g.............este md
M,H2O= 18g/mol
m= 73molx18g/mol=1314 g....................m,apa

c%= mdx100/ms= mdx100/(md+m,apa)
inlocuieste si calculeaza !!