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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?