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Calculati cantitatea de solutie NaOH de concentratie 20% care reactioneaza cu 320g CuSO4?

Răspuns :

Mirceavaman
1)Scriem reactia:
320g........x=?
CuSO4 + 2NaOH -> Na2SO4 + Cu(OH)2
160g.......2*40g
x=320*80/160=160g NaOH
160g NaOH reprezinta masa de substanta dizolvata in solutie (md)
c=md*100/ms => ms=md*100/c=160*100/20=800 g solutie NaOH

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