chemical formulae and equations

• sulfate SO4
• Nitrate (NO3-)
• bromide (Br-)
• iodine (I-)
• manganate(VII) (MnO4-)
• phosphate (PO4)3-
• Silver (Ag+)
• ammonium (NH4+)
• barium (Ba2+)
• iron(II) (Fe2+)
• lead (Pb)