
 

| Wednesday, February 16, 2011 @ 7:06 PM Hydrogen peroxide experiment I just came back from school and felt totally exhausted. School ended at 5 pm today. I met Amp at the study centre and printed out my Biology homework before we headed out in the cold. It was supposed to be 2 degrees out there but somehow I think that it was much colder in the morning. That aside, we walked our way through the familiar route to Cornmarket Street where we stopped at Tesco for grocery. We are planning another 'Cooking Session' on Saturday after our badminton club. We are definitely dragging Train along this time. :) Just to refer to this entry's title for just a little bit, we had a Biology practical on the enzyme catalase today. We had to weigh 4 g of chicken liver, chopped them up into 20 tiny pieces and add hydrogen peroxide to it. Catalase, which is known for having the fastest 'turn over' rate, works incredibly fast. About 7 s is all it takes for 50 cm3 of bubbles to form and eventually overflowed the test tube. It was fascinating to watch and that was before we added iron filings, the catalyst. The reaction produced 50 cm3 of bubbles within 3 s! That was just phenomenal. Catalase breaks down 40 millions molecules of H2O2 in a second! Amazing stuff. I hope I haven't bore you to tears with all that facts but I really did enjoy our little experiment there. It's going to be 7.30 soon and that means homework time. I may be making memory cards for Chemistry today. So, as always, I have to get going! I'll write again soon! ^^ | 
HEARTS❤