1. A CIDS B ASES AND P H Year 8 Science Mr Kos

2. Acids and Bases Acids and Bases are found everywhere – Common acids include: Hydrochloric Acid – Found in Gastric Juice – Used to clean bricks Citric Acid – Lemon Juice Acetic Acid – Vinegar Carbonic Acid – Soft Drink

3. Acids and Bases are found everywhere – Common bases include: Soaps and Detergents Lime Antacids

4. Acids and Bases Features of Acids – Taste sour (from latin Acidus/acere meaning sour) – Corrosive – React with bases to form salt and water – React with metals to form hydrogen gas Features of Bases – Taste Bitter – Feel Slippery – Corrosive – Alkalis are bases that dissolve in water – React with acids to form salt and water

5. Acids and Bases Definitions of acids Boyle described them that they neutralise bases and that they are sour Arrhenius, – Increase H 3 O+ concentration Bronsted-Lowry – Donates H+ ion

6. Acids and Bases Definitions of bases Arrhenius, – Increase HO- concentration Bronsted-Lowry – Accepts H+ ion

7. 1.Vinegar + Baking Soda > Carbonic Acid 2.Carbonic Acid > Water + Carbon Dioxide 3.Vinegar: CH 3 COOH -> CH 3 COO - + H + Baking Soda: NaHCO 3 -> Na + + HCO 3 - 4.H + + HCO 3 - -> H 2 CO 3 Carbonic Acid 5.H 2 CO 3 -> H 2 O + CO 2 In our fizzy bubbly prac: