To determine if the compound is an ionic compound, heat it up until the compound reaches its melting point and become molten. Use the molten form to set up an electric circuit and see if the compound will conduct electricity. If the compound conduct electricity then it is an ionic compound. If it does not conduct electricity, it is not an ionic compound. Ionic compounds usually conduct electricity in their molten forms.<span />
One molecule of water contains two atoms of hydrogen and one atom of oxygen, the atomicity of water is three.
When the concentration of H+ and OH- are equal, the pH = 7
Since together, the -log [H+] + -log [OH-] must equal 14 for all aqueous systems.