Question

Un volum de solutie de H2SO4 de concentratie 72% si densitate 1,64 g/cm3 se dilueaza cu 3V H2O.
b) calculati concentratia procentuala si concentratia molara a solutiei finale.

Answer 1

ro = ms/V => ms = ro*V = 1,64V

C = md/ms*100 => md = C*ms/100 = 72*1,64V/100 = 1,1808V

ms final = ms+mH2O = 1,64V+3V = 4,64V

b) Cf = md/msf *100 = 1,64/4,64*100 = 35,344%

C = md/M*V(L) = 1,1808V/98V = 0,012 M