Acids and Bases

Question 1

Physical properties of Acids

Answer 1

• Dissolves in water to produce hydrogen ions
• Sour taste
• turns blue liitmus paper red
• Ph value <7

Question 2

Acid definition

Answer 2

An acid is a substance that dissociates in water to form H+ ions

Question 3

Chemical properties of Acids

Answer 3

Acid + metal → salt + hydrogen (test w lighted splint)

Acid + carbonate → salt + water + carbon dioxide (test w limewater)

Acid + bases(metal oxides +metal hydroxides) → salt + water

Question 4

Strength/concentration of Acids

Answer 4

Determined by the degree of isonisation in water
Strong acids → fully ionises in water
Weak acids → partially ionises in water

eg HCl→ H+ Cl- → strong acid
CH3COOH ⇌ CH3COO- + H+ → weak acid

Concentration→ as amt of water ↑, concentration↓

Question 5

Uses of Sulfuric acid

Answer 5

Used in the manufacture of detergents and fertilisers

Used in car batteries as an electrolyte

Question 6

Basicity of Acids

Answer 6

Monobasic → Produced 1 H+ ion
Dibasic → produces 2 H+ ions
Tribasic → produces 3 H+ ions