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Homework Help Forum: biology
Current Questions | Post a New Question | Answer this Question | Further Reading
Posted by Josh on Saturday, September 22, 2007 at 7:04am in response to biology.
I have another experiment that I am not clear about the results. Any help? Put water and manganese dioxide powder in test tube, see what happens. Then put sand in the mixture. Results? Then,put liver in it. What happens? Thanks for helping.
Based on the information provided, here is a step-by-step breakdown of the experiment and the expected results:
1. Start by putting water and manganese dioxide powder in a test tube.
- The manganese dioxide powder may react with the water, causing a color change or the release of gas. This reaction is often used to generate oxygen gas in the laboratory.
2. Observe and note down any changes or reactions that occur in the test tube.
3. Next, add sand to the mixture in the test tube.
- The sand is an inert substance and is unlikely to cause any noticeable changes or reactions.
4. Observe and note down any changes or reactions that occur in the test tube after adding sand.
5. Finally, add liver to the mixture in the test tube.
- The liver is an organic substance and may react with the manganese dioxide or other components in the mixture. The liver may decompose or release gases, such as carbon dioxide.
6. Observe and note down any changes or reactions that occur in the test tube after adding liver.
Remember to record your observations accurately and compare them to your initial hypotheses.
In this experiment, you are testing the reaction of water, manganese dioxide powder, and various substances like sand and liver. To understand the results, you need to observe the changes that occur when these substances are mixed together.
Here's what you can expect to happen:
1. When you mix water and manganese dioxide powder in a test tube, you may observe some bubbling or fizzing. This is because manganese dioxide is a catalyst that can help break down hydrogen peroxide, which may be present in small amounts in the water. The reaction results in the production of oxygen gas, which can create bubbles.
2. When you add sand to the mixture, there may not be any noticeable change. Sand is inert, meaning it doesn't react with the other substances in the mixture.
3. Finally, when you add liver to the mixture, you may observe more bubbling or fizzing. Liver contains enzymes, which are biological catalysts that can speed up chemical reactions. The enzymes in the liver can react with the hydrogen peroxide produced earlier and break it down into water and oxygen gas. This reaction can create more bubbles or foam.
Overall, the experiment demonstrates the effect of catalysts (manganese dioxide and liver enzymes) on the breakdown of hydrogen peroxide. It shows that catalysts can speed up chemical reactions without being consumed in the process.
To better understand the results, it's important to record your observations accurately and compare them to what you expected to happen. You can also research the chemical reactions involved and their mechanisms to gain a deeper understanding of the experiment.