Acids, Bases and pH Part One.

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Presentation transcript:

Acids, Bases and pH Part One

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

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

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

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