1. Acids, Bases and pH
Part One

2. What is pH?
A measure of Hydronium Ion (H3O+) concentration in solution
Measured on a scale ranging from 0 – 14
Acid = <7
Base = >7
Neutral = 7, example: pure water

3. What is an Acid?
A substance that produces hydrogen ions (H+) in solution
Acids have a pH less than 7
The further away from seven the stronger the acid
Example: A pH of 2 is more acidic than a pH of 5

4. What is a Base?
A substance that produces hydroxide ions (OH-) in solution.
Bases have a pH >7
The further away from 7 the stronger the base
Example: A pH of 13 is more basic than a pH of 8

5. Examples of Common Acids and Bases
Acetic Acid – Vinegar
Acetylsalicylic Acid – Aspirin
Hydrochloric Acid – Gastric juice in the stomach
Aluminum Hydroxide – Deodorant
Sodium Hydroxide – Drain cleaner, soap making
Ammonia – Household cleaners