STARTERYou have three unknown liquids in

three bottles and you are given universal indicator. How can you tell

which is which in each bottle ?

SCIENCE IS MAGIC

UNIVERSAL INDICATOR IS JUST LIKE TRAFFIC LIGHTS

ACIDS TURN RED

NEUTRAL TURN GREEN

ALKALI TURN BLUE/PURPLE

ACIDS AND ALKALIS USED IN EVERYDAY LIFE

CITRUS FRUIT (Oranges)

BLEACHES

TOOTHPASTE

FIZZY DRINKS CAR BATTERIES

INDIGESTION TABLETS

SWEETS (Refreshers)

VINEGAR

EXPERIMENT TO SEE WHAT HOUSEHOLD ITEMS ARE ACID OR ALKALI

• RESOURCES• U.I paper, p.H chart.• Test tubes and test

tube rack.• Water bottle• Lemon juice, sherbet,

milk, soda water, shampoo

Making your own indicator using red cabbage.

• Get some red cabbage.• Crush up the red

cabbage.• Boil up the red

cabbage in water.• Pour the red cabbage

water through sieve.• Use it to test the

substances as before.

Chart of p.H for red cabbage

Rainbow Fizz

• Test tube 1 Sodium hydrogen carbonate

• Add Test tube 2 Water • Add Test tube 3 Universal indicator

• Add Test tube 4 Acid and make observations

THE ENDNow its time to taste some chemistry

SWEETS