3boys2girls » 化學物理生物 » [email protected] gas was collected during the experiment?

2009-3-22 17:56 為何要落淚t3t
[email protected] gas was collected during the experiment?

[img]http://i524.photobucket.com/albums/cc324/orzxdxp/bio.jpg[/img]






[size=3](1) [b]Present the results of the experiment in the form of a graph.[/b]
              (呢題我自己做左,唔洗理呢題)



(2) [b]What gas was collected during the experiment?    [/b]
[b]      Describe how you can test for the presence of this gas.[/b]





(3)

A sample of the liver extract kept at 0。C and another sample kept at 100 。C were each brought to 37。C and then tested with hydrogen peroxide. The results from the two samples were different .

(a) [b]Which sample, the one originally  kept at 0。C or at 100。C, caused more gas to be evolved?[/b]

(b) [/size][size=3][b]Explain your answer.
[/b]





(4) [b]Can catalase break down any substances other than hrdrogen peroxide? Explain your answer.[/b]



[b][size=2][/size][/b][/size]
[b][size=2][/size][/b]
[b][size=2][/size][/b]
[b][size=2][/size][/b]
[b][size=2][/size][/b]
[b][size=2][/size][/b]
[size=2]。C等於degree celsius,我打唔到個符號- -[/size]






[size=2]唔該呀.......好急ga!!!我自己做過d ans.好垃圾下= =[/size]

2009-3-22 19:22 JL`BAB!!!
其實你要做d乜 -.-
唔係好明 -3-

2009-3-22 22:40 為何要落淚t3t
回復 #2 JL`BAB!!! 的帖子

(1)、(2)、(3)、(4)係問題..


我想有人答我= =


最上果堆文字同個表格係資料.

2009-3-23 00:21 magiyafeimo
遲左答,希望你睇得切,頭先為左幫d懶學生所以而家先答到,要怪就怪佢啦,激死我!
(1) Present the results of the experiment in the form of a graph.

第一題畫圖都得,從略

(2) What gas was collected during the experiment?Describe how you can test for the presence of this gas.

oxygen
2h2o2-->2h2O + o2
You could use a glowing split to put into a test tube that collected the gas, if it burns again then there is oxygen inside.

(3) A sample of the liver extract kept at 0。C and another sample kept at 100 。C were each brought to 37。C and then tested with hydrogen peroxide. The results from the two samples were different.
(a) Which sample, the one originally kept at 0。C or at 100。C, caused more gas to be evolved?
0 C
(b) Explain your answer.
for the one originally kept at 100 C, the enzyme will be denatured due to the high temperature and could not provided function of enzyme again even though the temperature becomes 37 C, but the one originally kept at 0 C will have the enzyme inactive but could have the function back in 37 C

(4) Can catalase break down any substances other than hydrogen peroxide? Explain your answer.
Yes, because its function is to speed up the reaction only and it will not involve in the reaction. So it could break down the other substance.

[[i] 本帖最後由 magiyafeimo 於 2009-3-23 00:27 編輯 [/i]]

2009-3-23 00:26 magiyafeimo
遲左答,希望你睇得切,頭先為左幫d懶學生所以而家先答到,要怪就怪佢啦,激死我!

(1) Present the results of the experiment in the form of a graph.

第一題畫圖都得,從略


(2) What gas was collected during the experiment?   
      Describe how you can test for the presence of this gas.

oxygen
2h2o2

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