hi i have a big problem got a practical, the effect of catalase on the rate of reaction on hydrogen peroxide. but i don't know the amount of hydrogen peroxide i should use or the source of enzyme? can anyone help? the source of enzyme cant be liver or potato. thanks S x


The enzyme? Prick your finger and use a drop of blood. The amount of peroxide? IT depends on how you are measuring rate of decomposition. If visual is all, then use about 20 ml.

Dehydrogen catalase is also found in yeast, if you are to chicken to prick your finger.

It seems like you are looking for alternative sources of the enzyme catalase and guidance on the amount of hydrogen peroxide to use for your practical experiment. Here's some information that may help you:

1. Alternative sources of catalase:
- Yeast: Yeast contains catalase and can be used as a source for your experiment. It can be easily obtained from a local grocery store or bakery.
- Banana: Unripe bananas contain catalase as well, although the concentration may be lower compared to other sources.
- Fresh fruits and vegetables: Some fresh fruits and vegetables also contain catalase, although the activity may vary. Examples include apples, carrots, and cherries.

2. Amount of hydrogen peroxide to use:
The amount of hydrogen peroxide you should use can vary depending on the specific requirements of your experiment. If you are measuring the rate of decomposition visually, you can start with approximately 20 ml of hydrogen peroxide in your reaction mixture. However, it's always good to consult your experiment guidelines or consult your teacher for a more accurate recommendation.

Remember to exercise caution and follow proper safety procedures while conducting experiments, such as wearing gloves and lab goggles, working in a well-ventilated area, and disposing of chemicals properly.