Catalae Lab

Only available on StudyMode
  • Download(s) : 369
  • Published : February 19, 2012
Open Document
Text Preview
Catalase Lab
Purpose: To observe the effects of hydrogen peroxide on living tissue and non-living materials, showing the presence or absence of catalase as observed by the presences of bubbles. Hypothesis: If we pour H2O2 on certain substances, the catalase will break down and bubbles will appear at the surface. Data table:

Name| Time | Observation |
Raw Potato | 1 min. 30 sec.| Slow reaction, barley any bubbles.| Raw Liver| 5 min. 30 sec.| Extremely fast reaction, very foamy, Big Bubbles.| Raw Hamburger| 5 min. | Lots of foamy bubbles, fast reaction, bubbles got small.| Cooked Liver | 5 min. | Bubbly fizz, Colored changed.|

Cooked carrot | 41 sec. | No bubbles, little fizz.|
I can accept my hypothesis because my group and I proved that when you pour hydrogen peroxide on non-living materials and living tissues that it breaks down catalase and forms bubbles and at the surface. In this lab we tested raw potato, raw liver, raw hamburger, cooked liver and cooked carrot. All of these substances had differnet reactions to the hydrogen peroxide. The raw potato had a slow reaction. It didn’t really bubble, but it did fizz for 1 minute and 30 seconds. The raw liver had an extremely fast reaction to when the peroxide hit it. The bubbles were very foamy and big, it foamed over the test tube. This reaction went for at least 5 minutes. The raw hamburger had a similar to reaction to the hydrogen peroxide. It foamed, but it didn’t foam as much as the raw liver. The hamburger had big bubbles. This reaction went on for five minutes. The cooked liver didn’t really bubble, but it was more like bubbly fizz. It also changed colors it went from a brown colored outside with a pink interior to a light brown color. This reaction went on for about 5 minutes. The last material we tested was cooked carrot. The carrot didn’t bubble, but it fizzed for about 41 seconds. Our results would have been more accurate if the portions of our materials were...
tracking img