1.Learning Goals: To understand what pH is To understand what the colours and numbers on the pH scale mean To understand the pH of some household examples

2. 1.Name an acid 2.What element is common to all acids3.Name a base 4.What makes a base different from an acid? 3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14Neutral Equal H+ and OH- 4. Hydrochloric AcidH+H+ClClCl H+ All acids contain (H+) in solution. pH is a fancy measure of the number of H+ ions in solution (but backward) What will sort of number will an acid with lots of H+ give us? 5. 1 2 3 4 5 6 7 8 9 10 11 12 13 14StrongWeakacidacidLots of H+Less of H+The more H+ the solution has, the smaller the pH number 6. Sodium Hydroxide Bases dont contain H+. The more OH- is in the base, the less space there is for H+ in solution A weak base contains few OH- what will that mean about the pH?NaOH-OH+NaNaOH- 7. 1 2 3 4 5 6 7 8 9 10 11 12 13 14The more OH+ the solution has, the less H-, The bigger the pH number isLess of H+WeakStrongbasebase Very Little H+ 8. pH Quiz rules:2 teams (either girls Vs boys or sides of the room First side with a hand upIf first hand up doesnt get it, the question goes to the other team 9. BananapH 5 10. Battery AcidpH 0 11. BeerpH 4 12. Bicarbonate of SodapH 8 13. BleachpH 13 14. BloodpH 7.5 15. CokepH 3 16. Drain CleanerpH 14 17. Hand SoappH 10 18. Lemon JuicepH 2 19. MilkpH 6 20. Orange JuicepH 3 21. Pure WaterpH 7 22. SalivapH 6 23. Sea WaterpH 8 24. Stomach AcidpH 2 25. ToothpastepH 9 26. UrinepH 6