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2014-04-25T15:54:30+03:00
Na2O + H2O --> 2 NaOH + H2
62 g Na2O..........2*40 g NaOH
10 g Na2O.........x g NaOH         x = 12,9 g NaOH
randamentul = masa practica/masa teoretic * 100
masa practica = 12,9 * 60/100=>masa practica = 7.74 g NaOH