Se prepara o solutie dizolvand 20g NaOH in 230g apa C=?%

Răspuns :

Răspuns:

md=20g

mapa =230g

ms=md+mapa=20+130=250g

C=md×100/ms=20×100/250=8%

Răspuns:

md=20g

mapa =230g

ms=md+mapa=20+130=250g

c=md×100:ms=20×100:250=8%