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Объяснение:
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Поделитесь своими знаниями, ответьте на вопрос:
Составить схему совместного гидролиза двух солей: na2s+cr2(so4)3=
s2- +h20=oh- +hs-
nahs+h20=naoh+h2s
hs- +h20=oh-+h2s по аниону pH>7
cr2(so4)3+h2o=croh(so4)2+h2so4
croh(so4)2+hoh= cr(oh)2so4+h2so4
cr(oh)2so4+hoh=cr(oh)3+h2so4
cr(oh)+ +2hoh=cr(oh)3 +2h+
Cr2(SO4)3 + 3Na2S + 6H2O → 2Cr(OH)3 + 3H2S + 3Na2SO4