H2SO4 + 2NaOH = Na2SO4 + 2H2O
x/98 = 20*2%/80 = y/142
x=0.49g(H2SO4质量)
y=0.71g(Na2SO4质量)
原来溶液中的Na2SO4质量:30 - 29.22 - 0.49 = 0.29g
Na2SO4% = (0.29+0.71)/(30+20) = 2%
H2SO4 + 2NaOH = Na2SO4 + 2H2O
x/98 = 20*2%/80 = y/142
x=0.49g(H2SO4质量)
y=0.71g(Na2SO4质量)
原来溶液中的Na2SO4质量:30 - 29.22 - 0.49 = 0.29g
Na2SO4% = (0.29+0.71)/(30+20) = 2%