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winnie101:
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

Sue T:
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

247sports:
could someone plz explain me the process for serial dilution ???

AS-Girl:
Check this out
might help in getting the idea
http://www.youtube.com/watch?v=99ec1eDVkaE&feature=related

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