Or an example of this is the following. Now, notice what happened. This hydroxide in our first reactant kicked off this so four molecule, forming a bond with H and forming our first product, our water molecule. Likewise, this K molecule bonded with the molecule that got kicked off this so four. So this so four molecule at the same time kicked off this oh or replaced this oh and bonded with H. And we got K two So four. So this is an example of a metaphosis or a double displacement reaction.