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Calculati masa solutiei de NaOH de concentratie 20% necesare pentru neutralizare 200 grame HCl de concentratie 10%

Răspuns :

c = md/ms * 100 => md = 200*10/100 = 20 g HCl
HCl + NaOH => NaCl + H2O
36.5 g HCl.......40 g NaOH
20 g HCl.............x
x = 21.92 g NaOH
c = md/ms * 100 => ms = 21.92/20 * 100 = 109.6 g solutie NaOH 20%