Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
nid404:
hmm....
Past papers is the key....but learn ur base concepts well
Any problems, ur more than welcome to post here
Saladin:
yes....
do past-papers a lot
and if u have any problems
be sure to post them here: https://studentforums.biz/index.php/topic,4425.495.html
i can help u pretty much with all subjects
sarasa:
I have a doubt in Biology paper 6 O/N/07, in Q1 (b) (ii) it is written in da mark scheme : agitate the same, what do u mean by this. Can anyone tell me what is a buffer?
Finally, can u write a model answer for it, i just don't get the question ???? Thank u in advance! :D
nid404:
--- Quote from: sarasa on April 06, 2010, 11:07:56 pm ---I have a doubt in Biology paper 6 O/N/07, in Q1 (b) (ii) it is written in da mark scheme : agitate the same, what do u mean by this. Can anyone tell me what is a buffer?
Finally, can u write a model answer for it, i just don't get the question ???? Thank u in advance! :D
--- End quote ---
the point u mentioned is followed by increase in range of pH tested....this means u carry out the same procedure to obtain the desired result for the new temperatures...
Buffer is an ionic compound that resists change in it's pH. So, when u use a buffer, u ensure that there is no change in pH...thereby maintaining the desired pH(making the results more reliable)
ruby92:
Thank You ;D
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