Na + H2O ---> NaOH
2 NaOH + CO ---> Na2CO3 + H2
1 mol Na......40 g NaOH
2 moli Na..........x g NaOH x = 80 g
2*40 g NaOH.........106 g Na2CO3
80 g NaOH..............y g Na2CO3 y = 106 g Na2CO3
ms=md+m apa = 106 + 300 = 406 g solutie
c%=md/ms * 100 = 106/406 * 100 = 26,108 %
mase molare NaOH = 40 g/mol si Na2CO3 = 106 g/mol