Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
nid404:
--- Quote from: the golden girl on April 29, 2010, 08:41:44 am ---srry but i don't get it ! ....can someone explain to me y doctors take urine sample from pregnant ladies ?
--- End quote ---
HCG(Human chorionic Gonadotrophin) is present in a pregnant woman's urine...they take the urine sample to test for HCG.
holtadit:
Okies people.
Why WOULDN'T you use Universal Indicator in a titration experiment. Instead why WOULD you use methyl orange ?
nid404:
While titrating, you can't use Universal indicator because it changes its colour gradually, gives diff colors for diff pH. You won't know when the reaction is complete...
While methyl orange or phenolphthalein are used instead because they give a sudden color change. It is better to for us to see the end point
holtadit:
--- Quote from: nid404 on April 29, 2010, 04:08:59 pm ---While titrating, you can't use Universal indicator because it changes its colour gradually, gives diff colors for diff pH. You won't know when the reaction is complete...
While methyl orange or phenolphthalein are used instead because they give a sudden color change. It is better to for us to see the end point
--- End quote ---
Ahhhhh.... Thanks nid. My lack of practical experience worries me. Next year I am gonna kill the teacher if we dont do proper experiments.
Kef halak ana akh means how are you my brother ;)
nid404:
--- Quote from: Ari Ben Canaan on April 29, 2010, 04:12:15 pm ---Ahhhhh.... Thanks nid. My lack of practical experience worries me. Next year I am gonna kill the teacher if we dont do proper experiments.
Kef halak ana akh means how are you my brother ;)
--- End quote ---
i know kef halak
ana bikhair (i knw i spelt it wrong but i knw :P ) Ahmadullilah (i know this is spelt wrong too :P )
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