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200g sol vitriol
concentratie 49%
reactioneaza cu sol soda caustica.
Aflati:
a)md vitriol
b)md soda caustica


Răspuns :

ms=200g
c=49%

49...........100
x.............200
x=98 g H2SO4  (a)

H2SO4+2NaOH->Na2SO4+2H2O

M NaOH=23+1+16=40g/mol
 98g H2SO4..................2*40 g NaOH
80g NaOH (b)