Question

ce masa de hidoxid de sodiu solid trebuie dizolvata in 500 g acid clorhidric pentru concentratia de 30%

Answer 1

C=md/ms*100=>md=C*ms/100=30*500/100=150g HCl

NaOH + HCl => NaCl + H2O

40g NaOH...............36,5g HCl
xg NaOH..................150g HCl

x=150*40/36,5=