1. Acid-Base Notes

2. Acid- Compound that forms hydrogen ions (H + ) when dissolved in water Base – compounds that forms hydroxide ion (OH - ) when dissolved in water pH Scale = hydrogen ion concentration

3. Buffer – a solution that resist a change in pH Indicator – a substance whose color depends on the pH of the solution it is in

4. pH scale H+ H+ H +  OH - H + =OH - OH - H +  OH -

5. To neutralize an acid you need to add a base You need to add the same OH - ion concentration as you have H + ion concentration to neutralize a solution. For Example: If you have an acid with a pH of 1 you will need to add a base of 13 to neutralize it. An acid of 5, you need a base of 9.

6. When you neutralize an acid with a base you end up with water and a salt. Example: HCl + NaOH H 2 O + NaCl