1. Dissociation and Neutralization GLE 9.4.4

2. What is dissociation? The process by which an ionic compound separates into its positive ions (cations) and negative ions (anions). For example HF  H + + F - Li 2 O  Li + + O 2- NaCl  Na + + Cl -

3. Dissociation of an Acid When an acid is added to water it separates into its respective ions For example HCl + H 2 O  H + + Cl - + H 2 0  Cl- + H 3 O +

4. Dissociation of a Base When a base is added to water, it separates into its ions. For example NaOH + H 2 O  Na + + OH - + H 2 O LiOH + + H 2 O  Na + + OH - + H 2 O

5. What happens when you combine an acid and a base? When an acid and base combine you are neutralizing the pH and water and salt are formed. This process is referred to as neutralization. For example HCl + NaOH  NaCl+ H 2 O HF + LiOH  LiF + H 2 O A salt doesn’t have to be NaCl, but any negative ions (anions) from an acid combining with postive ions (cations) from a base. Like LiF in the example above.

6. Let’s Review! ______________ is the process by which an ionic compound separates into its positive and negative ions. Dissociation of _________ produces a negative ion (or an anion) and hydronium (H 3 O + ) Dissociation of __________ produces a positive ion (or a cation) and hydroxide (OH - ) When you combine an acid and a base you form _______ and a _________.

7. Let’s Review! Dissociation is the process by which an ionic compound separates into its positive and negative ions. Dissociation of an acid produces a negative ion (or an anion) and hydronium (H 3 O + ) Dissociation of a base produces a positive ion (or a cation) and hydroxide (OH - ) When you combine an acid and a base you form water and a salt.

8. What’s actually happening during neutralization Watch the video on you tube. NaCl when combine in water dissociate into their respective ions (Na + and Cl - ) since they do not have anything to do with the neutralization they are referred to as spectator ions. http://www.youtube.com/w atch?feature=player_detai lpage&v=PCM5IwJ8wcs