Acids and Bases and pH

• How can we use acids and bases in our everyday lives?

Acids and Bases

• Acids and Bases Song

Demonstration

• It’s Magic!!• Phenolphthalein is an

indicator of acids (colorless) and bases (pink).

Acids

• Tastes sour• Reacts with metals

and carbonates• Turns BLUE litmus

paper red• H+ (hydrogen ion)

Hydrochloric Acid

HCl

Sulfuric Acid H2SO4

Acetic Acid HC2H3O2

Acids produce hydrogen ions in water

Bases

• Taste bitter• Feels slippery• Turns RED litmus

paper blue• OH¯ (hydroxide ion)

Sodium Hydroxide

NaOH

Potassium Hydroxide

KOH

Aluminum Hydroxide

Al(OH)3

Bases produce hydroxide ions in water

pH Scale

• Acids and Bases Video

• Measures the concentration of hydrogen ions in a solution.

• Ranges from 0-14– 0=Acid (0-6.9)– 7= Neutral (7)– 14=Base (7.1-14)

pH

• A low pH – concentration of hydrogen ions is high.(0)

• A high pH – concentration of hydrogen ions is low. (14)

Neutralization Reaction

• An acid plus a base produces a salt and a water.

HCl + NaOH NaCl + H2O

EQ: How can we use acids and bases in our everyday lives?

Summarizer

•How can we use acids and bases in

our everyday lives?