Qualification > Sciences
Chemistry AS Multi Choice Help
MaNi_DaDuDe:
I think you take out the moles for each then the %yield ..
I can't type the working on my phone; sorry. :(
--- Quote from: happy angel on November 19, 2009, 04:11:16 am ---Use of the Data Booklet is relevant to this question.
Ethyl ethanoate can be obtained from ethanoic acid and ethanol by the following reaction.
CH3CH2OH + CH3CO2H--> CH3CO2CH2CH3 + H2O
Ethanol (30 g) and ethanoic acid (30 g) are heated under reflux together, and 22 g of ethyl
ethanoate are obtained.
What is the yield of the ester?
A 25 % B 38 % C 50 % D 77 %
the answer is C.. how???
--- End quote ---
happy angel:
its ok mani... i'll work it ouuuuuut.. Thanks anw... am so sleepy!!! my mind not working!
lol... have a nice day...
n Thanks anyway...
c genti
MaNi_DaDuDe:
--- Quote from: happy angel on November 19, 2009, 04:59:14 am ---its ok mani... i'll work it ouuuuuut.. Thanks anw... am so sleepy!!! my mind not working!
lol... have a nice day...
n Thanks anyway...
c genti
--- End quote ---
Yes, it's 9 AM at your end.
Get some rest and then attempt papers with a fresh mind.
Good night, err morning.
iq101:
Can someone please do November 07 question 16?!
Why cant it be A?
happy angel:
--- Quote from: iq101 on November 19, 2009, 11:24:24 am ---Can someone please do November 07 question 16?!
Why cant it be A?
--- End quote ---
hey dude the answer IS A.. LOLSS check the marking scheme well... ::)
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