Question

để trung hòa 100ml dd h2so4 0.5m bằng v ml dd naoh 1 M , tìm v

Answer 1

V_H2SO4=100ml=0,1l

nH₂SO₄=0,1×0,5=0,05mol

H2SO4+2NaOH==>Na2SO4+2H2O

nH2SO4=nNaOH=1mol

V_NaOH=n/CM=1/1=1l

Answer 2

để trung hòa 100ml dd h2so4 0.5m bằng v ml dd naoh 1 M , tìm v

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nH2SO4= 0,1. 0,5= 0,05(mol)

PTHH: 2 NaOH+ H2SO4 -> Na2SO4 + 2 H2O

nNaOH= 2.nH2SO4= 2.0,05=0,1(mol)

=> VddNaOH= 0,1/1= 0,1(l)= 100(ml)

=> V=100(ml)