Cr2(SO4)3 + Na3PO4 = CrPO4 + 2 NaSO4 + NaCrSO4.
K2S + 2HCl = 2KCl + H2S .
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Cr2(SO4)3 + Na3PO4 = CrPO4 + 2 NaSO4 + NaCrSO4.
K2S + 2HCl = 2KCl + H2S .