400g solutie H2SO4 de concentratie 49% reactioneaza cu zincul. Determinati masa de zinc consumata si volumul de gaz degajat.
ms= 400g
c=49%
Calculam masa de acid sulfuric dizolvata in solutie(md):
c =md/msx100
md= cxms/100
md = 49x400/100 MH2SO4 = 2+32+6
md =196g H2SO4 = 98
65 98 22,4
Zn + H2SO4 → ZnSO4 + H2↑
x 196 y
x = 65x196/98
x = 130g Zn
y =196x22,4/98
y =44,8l (litri)H2