Qualification > Sciences
Need help on CIE Chemistry Paper 5!
Deadly_king:
--- Quote from: moon on October 17, 2010, 01:49:06 pm ---Ur explanation is wonderful. You are doing a great job...thank u very much :)
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You're welcome buddy ;)
moon:
--- Quote from: Deadly_king on October 17, 2010, 01:09:31 pm ---This will depend.
Example :
1) First experiment you used 50cm3 of a known concentration of solution.
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Did we assume that the total volume is 50 cm3????
Deadly_king:
--- Quote from: moon on October 17, 2010, 02:01:32 pm ---Did we assume that the total volume is 50 cm3????
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Nope that's not an assumption. :D
You'll be given the total volume to be used in the question itself. You'll have to adjust for the other experiments such that you keep it constant for all experiments by adding water.
ashish:
--- Quote from: moon on October 17, 2010, 01:44:21 pm ---which value is a fictitious value??? mine or yours
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well the answer is
element mass Ar mole /simplest
O 1.00 16.0 0.0625 1.00
Cu 3.983 63.5 0.0627 1.00
answer: CuO
moon:
--- Quote from: Deadly_king on October 17, 2010, 02:04:38 pm ---Nope that's not an assumption. :D
You'll be given the total volume to be used in the question itself. You'll have to adjust for the other experiments such that you keep it constant for all experiments by adding water.
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but the question did not include 50cm3 ::) ::)
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