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Which chemical equations show a precipitation reaction? Use the solubility rules to help you. Select all the correct answers. Ca(NO3)2 MnSO4 β†’ CaSO4 Mn(NO3)2 MgBr2 2KCl β†’ MgCl2 2KBr 2NaOH MgCl2 β†’ 2NaCl Mg(OH)2 3FeCl2 2AlBr3 β†’ 3FeBr2 2AlCl3 2HI ZnBr2 β†’ 2HBr ZnI2