What is Acidity

Certain chemicals, when dissolved in water, make the water acidic or basic

• What are some examples of acidic or basic things?

  

• How is acidity measured

• We use pH to measure how acidic or basic a substance is
• pH is a logarithmic scale, it varies from 0, the most acidic, to 14, the most basic
• Examples: a solution with a pH of 1 contains 0.1 moles of acid per liter; a solution with a pH of 4 contains 0.0001 or 10-4 moles of acid per liter.

• If you added acid to a glass of water so it decreased in pH from 7 to 6 how much more acidic chemicals are in the water?