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2014-10-03T18:08:58+03:00
Observatie:Concentratia de NaOH este 40% nu 70%!!!!!
2 NaOH + H2SO4 ---> Na2SO4 + 2 H2O
2*40 g NaOH.........98 g H2SO4
md H2SO4 = 80*20/100 = 16 g H2SO4
x g NaOH.............16 g H2SO4            x = 13,06
ms NaOH =13,06/40 * 100 = 32,65 g solutie
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