Question

RAPID VA ROG!!!!!! se amesteca 124 de g Na2O cu o cantitate triple de apa.
a. script react chimica
b. calculate masa de H2O consumata de masa de NaOH formata
c. calculate concentratia procentuala a solutiei final

Answer 1

124g      m g          md g

Na2O + H2O --> 2NaOH

62          18           2x40

=> m = 124x18/60 = 36g apa consumata

=> md = 124x2x40/62 = 160 g

m.apa.ramasa = 3x124 = 372g - 36 = 336g

c% = mdx100/ms = 160x100/336 = 47,62%