Presentation:

Equipment:

Notes:

Demonstrations:

Activity	Type of chemistry	Demonstration	Equipment
Spicy Fruit	Acids & Bases	Use the litmus paper to test the acidity of different fruits, vegetables and other products in the kitchen.	Lemons, oranges, litmus paper, lemonade, coka cola, milk, etc
Fun with Textas	Chromatography	Place a small amount of salt solution in the bottom of a beaker. Dampen the bottom end of the filter paper and use different colours stripes (dark colours (green, grey, blue)) on the end. Once the colour seems to spread place the filter paper in the beaker and fold top end and place inside beaker. Watch the colour spread upwards.	10 plastic beakers, 20 strips of filter paper, water, textas (green, purple, orange, brown etc), salt solution.
Starchy Banana	Test for Starch	Place a small amount of iodine solution onto each of the bread, banana and biscuit samples to test for starch.	4 plastic beakers with samples of bread, banana and biscuits; iodine solution.
Acids!	Acids & Bases	Using lemon juice, bicarbonate of soda and sugar to make a lemonade. Place lemon juice in beaker. Top up with water. Tea spoon in bicarb of soda and mix well. Watch it overflow.	1 plastic beaker, lemon, bicarb of soda and water, plastic basin.
Fun with Soap	Detergent	Place a small amount of oil into a beaker of water. Add food colouring and watch it separate. Food colouring only mixing in certain substances: talk about oil-like and water-like substances. Add detergent and watch it disperse. Why does this work?	Beaker, water, oil, food colouring, detergent, eye dropper.
Lemon Battery	Galvanic cells	Place 2 electrodes (copper & zinc) into a series of half pieces of lemon. Connect with wires and use a 1.5V light bulb to light up.	3 lemons, 7 connecting wires, 6 pieces of copper, 6 pieces of zinc, 1.5V light bulb.
Washing	Detergents	Try washing water-based dirt out of cloth using oil and then water; washing oil-based dirt out of cloth using water and then oil; washing any dirt out of cloth using detergent.	6 cloths with water-based dirt, oil-based dirt and combination, detergent, 3 containers.
Toffee	Chemical reactions	Cook toffee from sugar in a frying pan??	Sugar & frying pan.
Eggs	Change of chemical structure	Cook eggs in a frying pan. How has it changed?	Eggs & frying pan.
Oobleck	Viscosity	Adding the minimum amount of water to (pure!) corn flour in a basin. The material Oobleck changes in viscosity depending on the amount of force you apply to it.	Basin, pure corn flour, water.
Corn	Popping Corn	Eventually someone usually volunteers the idea that popcorn pops because of water turning to steam and exploding the hard shell surrounding the kernel. The most likely sequence of events that unfold as the oil surrounding the kernel heats is that the starch- protein matrix inside the kernel absorbs water, expands as it cooks, and with the aid of the tremendous pressure developed as water turns to steam, explodes the kernel’s shell. When popcorn is popped in the classroom in a beaker, condensed water readily collects on the beaker walls as the popcorn pops. The ideal water content of a viable popcorn kernel ranges from 11 to 14 percent 2	Popping corn, oil & frying pan.
Cornflakes	Magnetism	The iron in cornflakes can be attracted by a very strong magnet.	Cornflakes & magnet.
Cabbage indicator	Acidity	Indicators are substances that change color in the presence of an acid or a base. They are usually weak acids and often are organic. There are indicators that are specific for acids (tea changes from dark to light when an acid such as lemon is added) and bases (see table below.) The table below is provided so that teachers can select indicators based upon their particular needs. A universal indicator will show color changes through the entire pH range. Red cabbage can provide a close approximation of a universal indicator and will be discussed a little later in the paper.	Cabbage indicator liquid, foods: lemonade, slice of apple, milk, lemons, coke, vinegar, soap, Drano, etc.
Water	Boiling point	Boil water and measure the temperature every 1 minute and graph a result over 20 minutes.	Water, pot or kettle?, thermometers.
Sink a paper clip	Surface tension	Place gently (!) a paper clip onto the surface of water in a large container. Using a tooth pick dipped in detergent tap the tooth pick into the water to dissolve a small amount of detergent. Watch the paper clip sink!	Detergent, paper clip, large container with water, tooth pick.

Topic notes:

Professor Cludd presenting information related to "Kitchen Chemistry ". Students could be able to:

• identify types of liquids in terms of oil-like and water-like liquids.
• change of states of substances when cooking.

Introduction to Kitchen Chemistry: