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Author Topic: bio practical as  (Read 1004 times)

Offline winnie101

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bio practical as
« on: May 15, 2010, 02:35:01 pm »
could someone plz explain to me how to make the solutions for june 2009 practical 32. and ques 2b how do i calculate the area of the field of view. i dont get anything from the marking scheme.
plz and thank u
any tips on wat to study is welcome
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Offline Sue T

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Re: bio practical as
« Reply #1 on: May 17, 2010, 01:35:11 pm »
u can take 0cm3 water, 10 cm3 salt , <the percentage conc is identical cuz its = (10/100) * (salt/water)>
th last column is simplt dividin by 2
 
then take 7.5water & 2.5 salt
then 2.5 water n 7.5 salt
then 2.5 water n 7.5 salt

there u go the readings are equally spaced + 3 readings are enough (i guess)

i wrote this in a hurry so if am not clear pls let me no
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Offline 247sports

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Re: bio practical as
« Reply #2 on: May 17, 2010, 01:42:58 pm »
could someone plz explain me the process for serial dilution ???
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Offline AS-Girl

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Re: bio practical as
« Reply #3 on: May 17, 2010, 01:49:22 pm »
Check this out
might help in getting the idea
http://www.youtube.com/watch?v=99ec1eDVkaE&feature=related
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