The following materials are needed for this exercise:
- Five slices of apple (or pear, banana, potato, or peach)
- Five plastic cups or other clear containers
- Vinegar (or dilute acetic acid)
- Lemon juice
- Solution of baking soda (sodium bicarbonate) and water (you want to dissolve the baking soda. Make the solution by adding water to your baking soda until it dissolves.)
- Solution of milk of magnesia and water (ratio isn't particularly important - you could make a mixture of one part water one part milk of magnesia. You just want the milk of magnesia to flow more readily.)
- Water
- Graduated cylinder or measuring cups
