Bases

1. Acids and Bases By Danya Ardis

2. Characteristics Of Acids Acids can be characterized by: • A sour taste. • It turns blue litmus paper red • It tastes sour. Try drinking lemon juice (citric acid)

3. Characteristics of Bases A Base is characterized by: • A bitter taste. (Milk of Magnesia) • It feels slippery. (Soapy Water) • It turns Red Litmus Blue.

4. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 The pH Scale 1 1 2 2 3 3 4 4 5 5 6 6 7 8 9 9 10 10 11 11 12 12 13 14 Strong Acid Weak Acid Neutral Weak Alkali Strong Alkali The ph scale measure how acidic or basic a solution is

5. Identifying Acids and Bases • Acids have a ph from 0-7 • Lower pH value indicates a stronger acid. • Bases have a pH from 7-14 • Higher pH value indicates a stronger base.

6. [H+] pH 10-14 14 10-13 13 10-12 12 10-11 11 10-10 10 10-9 9 10-8 8 10-7 7 10-6 6 10-5 5 10-4 4 10-3 3 10-2 2 10-1 1 100 0 1 M NaOH Ammonia (household cleaner) 7 Acid Base 0 14 Blood Pure wate Milk Acidic Neutral Basic Vinegar Lemon juice Stomach acid 1 M HCl pH Scale

7. Did we Miss something?? • What happens when the pH of a substance is 7? • Ans: A pH level of 7 indicates a Neutral Substance i.e: Water!