Oxides and Hydroxides

• Oxides and hydroxides also act as acids or bases. They are the anhydrides (without water) of acids or bases.

• H2SO4 - H2O = SO3

• 2H3PO4 - 3H2O = P2O5 (or P4O10)

• Ca(OH)2 - H2O = CaO

• Keep removing water until there is no H in the formula.

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