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ce masa de hidoxid de sodiu solid trebuie dizolvata in 500 g acid clorhidric pentru concentratia de 30%

Răspuns :

C=md/ms*100=>md=C*ms/100=30*500/100=150g HCl

NaOH + HCl => NaCl + H2O

40g NaOH...............36,5g HCl
xg NaOH..................150g HCl

x=150*40/36,5=