Acids and Bases - Yr 9 Intro

Acids are neutralised by...

• Bases

• Metals

• Water

• Hydrogen gas

Bases are neutralised by...

• Acids

• Metals

• Water

• Hydrogen gas

A neutralisation reaction produces...

• Acids

• Bases

• neutral water

• pH > 7

Acids have a pH

• greater than 7

• lower than 7

• equal to 7

Bases have a pH...

• greater than 7

• lower than 7

• equal to 7

Acids release...

• Hydrogen ions

• Hydroxide ions

• Sodium ions

• Hydrogen gas

Bases release...

• H⁺

• OH^-

• H₂

H⁺ + OH^- --> H₂O Is a chemical equation showing...

• A neutralisation reaction

• An acid-metal reaction

• An acid-carbonate reaction

Neutral solutions have a pH of:

• 0

• 1

• 7

• 14

Which is true?

• pH of less than 7 is basic; pH of more than 7 is acidic

• pH of less than 7 is acidic; pH of more than 7 is basic