Question

ce masa si ce cantitate de substanta de hidroxid de natriu va intra in reactie cu 980g de acid sulfuric 2NaOH+H2SO4=Na2SO4+2H2O asta e reactia.Daca e corect dau coroana si 20 puncte☆☆☆☆​

Answer 1

    xg            980g

 2 NaOH + H2SO4= Na2SO4 +2 H2O

  2.40g        98g

x=2.40 .980 :98=800g NaOH

n=m : M   [  n=nr. moli ; m=masa subst.  ; M=masa molara ]

n=800g : 40g/moli=20moli NaOH

( am calculat si molii , poate ai nevoie  )

MNaOH=23+16+1=40----->40g/moli

MH2SO4=2+32+4.16=98----->98g/moli