Question

O solutie de HCl de concentratie 36,5% reactioneaza cu 200g solutie NaOH 10%.Ce cantitate de solutie de HCl este necesara ?

Answer 1

Cp=md/ms*100 ⇒ md=200*10/100=20g NaOH

n=md/M=20/40=0,5 moli NaOH

nNaOH=nHCl=0,5 moli HCl ⇒ mdHCl=0,5*36,5=18,25g HCl

ms=md*100/Cp=1825/36,5=50g sol. HCl

HCl + NaOH  → NaCl + H2O