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3Al2O3•2SiO2(s) + 9Na2S2O7(s) = 6Na3Al(SO4)3(s) + 2SiO2(s)                       (1)
3Al2O3•2SiO2(s) + 9Na2S2O7(s) = 3Al2(SO4)3(s) + 9Na2SO4(s) + 2SiO2(s)     (2)
3Al2O3•2SiO2(s) + 9Na2S2O7(s) = 6NaAl(SO4)2(s) + 6Na2SO4(s) + 2SiO2(s)  (3)
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