Acids and Bases Acids and and Bases Bases. Acid and Bases There are many ways to classify compounds (ionic and covalent, organic and inorganic) – Acid.

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Presentation transcript:

Acids and Bases Acids and and Bases Bases

Acid and Bases There are many ways to classify compounds (ionic and covalent, organic and inorganic) – Acid and base is another way we can classify compounds Examples of familiar acids – Lemon juice = has ascorbic acid (vitamin C) – Vinegar = acetic acid – Stomach acid = hydrochloric acid (HCl)

Acids and Bases Examples of familiar bases: – Eggs – Soaps and detergent – Bleach Note: both strong acids and strong bases Are corrosive

How do we identify acids and bases The pH scale: A number scale for measuring how acidic or basic something is. pH scale:

pH of common products i

What do the numbers represent? The pH values represent an increase or decrease in the pH of 10 pH Example a change from pH 3 to a pH of = 10 3 = 1000 Example a change from pH 4 to a pH of 9.

What do the numbers represent? The pH values represent an increase or decrease in the pH of 10 pH Example a change from pH 3 to a pH of = 10 3 = 1000 Example a change from pH 4 to a pH of = 10 5 = 100,000

Indicators Indicators: Chemicals that change color depending on the pH of a solution they are placed in Why are they useful:

Indicators Indicators: Chemicals that change color depending on the pH of a solution they are placed in Why are they useful: Acids and bases can be dangerous at high concentrations. Indicators are a safe way to determine the concentration of an acid or base

Acids you need to remember for the Provincial Exam Hydrochloric Acid: HCl Sulfuric Acid: H 2 SO 4 Nitric Acid: HNO 3 Acetic Acid: CH 3 COOH

Indicators l