Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
To investigate the effects of increasing yeast concentration on the rate of Hydrogen Peroxide decomposition
Member rating: No Rating | Words: | Submitted: Thu Jan 13 2005
Page Preview
On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:
To investigate the effects of increasing yeast concentration on the rate of Hydrogen Peroxide decomposition Diagram Method 1. Weigh 0.1g of dry yeast powder into a conical flask using a top pan balance 2. Pour 40cm3 of Hydrogen Peroxide 10vols in to a measuring cylinder 3. Submerge a 100 cm3 measuring cylinder into a water bath ensuring no water escapes and no air bubbles form inside. 4. Add the Hydrogen Peroxide to the yeast and place the bung in the conical flask at the same time start the stop watch (try to minimise gas loss). Safety Wear goggles and wash your hands they come nt contact with Hydrogen Peroxide as it is highly irritant. Results Mass of yeast (g) Volume of Oxygen produced (cm3) Time Taken (s) Rate of O2 Production (cm3min-1) 0.0 0 0.00 0.00 0.1 100 103 58.25 0.2 100 36 166.67 0.3 100 17.38 345.22 0.4 100 11.49 522.19 0.5 100 8.2 731.71 Graph Conclusion Hydrogen peroxide decomposes to form oxygen and water; this reaction is catalysed by the enzyme catalase found in yeast. This is shown by the equation below: Catalase H202 O2 +...
Get instant access
- Instant, unlimited access to our documents in full
- Swap your work for free access, or pay £4.99
- To see the full version of this document and 149,488 others
