-Calculez masa de NaOH dizolvata in solutie
c/100=md/ms
40/100= md/200-------.> md= 80gNaOH
M,NaOH= 40g/mol; Vm= 22,4l/mol
1mol.......................................1mol
NaOH + NH4Cl-----> NaCl +NH3 + H2O
40g...........................................22,4l
80g...............................................V=.......................calculeaza !!!!