Question

Ajutati-ma va roggg dau coroana: 1.Ce cantitate de hidroxid de sodiu se obtine prin tratarea a 70,75g sodiu cu apa

Answer 1

MNa=23g/mol

n=m/M=70,75/23=3,076 moli Na

2Na + 2H2O => 2NaOH + H2

2 moli Na.......................2 moli NaOH
3,076 moli Na..............x=3,076 moli NaOH

MNaOH=ANa+AO+AH=23+16+1=40g/mol

n=m/M=>m=n*M=3,076*40 = Calculeaza !