TESTING THE OXIDATION POWER OF BLEACH
Real-World Question: How well does bleach oxidize the compounds in different stains?
Materials:
Cotton swabs Peanut butter
Bleach Dropper/straw
Milo Coco jam
Ketchup Access to Clothes dryer
Grass White cotton cloth
Grape juice Robber gloves
Bowl Permanent black marker
Barbeque brush Watch with second hand stopwatch
Procedure:
1. Take a peanut sized dab of ketchup and place it on one end of the white cloth. Brush the ketchup into the cloth to form a stain that is about the size of a quarter and label the stain with a permanent marker.
2. Thoroughly wash out the brush and repeat step 1 using Milo and coco jam. Place the stains side by side.
3. Use dropper to make quarter-sized stains of grape juice and peanut butter next to the other 3 stains. Label each stains
4. Place a cloth in a dryer until the stain dries.
5. Wearing rubber gloves, carefully pour bleach into a bowl.
6. Dip a cloth swab into the bleach and press the swab tip on the ketchup stain for 15 seconds.
7. Repeat step 6 for the other stains.
Conclude and Apply
1. Explain how bleach removes stains?
2. Describe the effectiveness of the bleach at oxidizing the compounds in the various stains you tested.
3. Infer why the bleach oxidized some stains better than others.