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2014-06-04T22:23:05+03:00
NaOH + HCl ---> NaCl + H2O
md NaOH = 250*20/100=50 g
40 g NaOH...36,5 g HCl
50 g NaOH........x g HCl     x = 45,625 g HCl
ms = md/c*100=45,625/36.5*100=125 g solutie HCl