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2014-05-26T12:18:02+03:00
2 NaOH + H2SO4 ---> Na2SO4 + 2 H2O
2*40 g NaOH......98 g H2SO4
160 g NaOH........x       x = 196 g H2SO4
C%=md/ms=>ms=196/49*100=>ms = 400 g solutie