AS Chemistry- helping each other out!
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Original post by thymolphthalein
GCE?
I did Edexcel IAL.
Our entire section B (about 23 marks) was Green Chemistry. ALL OF IT.
Section C had some organics and some mass-IR.
Literally ALL the other topics were shoved into the 20 MCQs.
Weird paper.
I did Edexcel IAL.
Our entire section B (about 23 marks) was Green Chemistry. ALL OF IT.
Section C had some organics and some mass-IR.
Literally ALL the other topics were shoved into the 20 MCQs.
Weird paper.
I did As level Edexcel Chem (not IAL) xD
THAT SOUNDS HORRIBLE BTW
Original post by Don Pedro K.
I did As level Edexcel Chem (not IAL) xD
THAT SOUNDS HORRIBLE BTW
THAT SOUNDS HORRIBLE BTW
Yeah GCE is the AS level Edexcel for non international centers.
Hahah, oh yeah I forgot there was a titration but that's pretty standard. And it was about removal of hair from a brown coloured cow...?
And the organic part was about compounds in smelly foot swear and urine. I think they went mad, honestly.
I didn't find it difficult just weird. But apparently lots of other people found it tough.
Original post by thymolphthalein
Yeah GCE is the AS level Edexcel for non international centers.
Hahah, oh yeah I forgot there was a titration but that's pretty standard. And it was about removal of hair from a brown coloured cow...?
And the organic part was about compounds in smelly foot swear and urine. I think they went mad, honestly.
I didn't find it difficult just weird. But apparently lots of other people found it tough.
Hahah, oh yeah I forgot there was a titration but that's pretty standard. And it was about removal of hair from a brown coloured cow...?
And the organic part was about compounds in smelly foot swear and urine. I think they went mad, honestly.
I didn't find it difficult just weird. But apparently lots of other people found it tough.
Hopefully that means your boundaries will be low and you'll ace it!
Original post by lerjj
Hopefully that means your boundaries will be low and you'll ace it!
Hopefully!
I missed an A by a few marks the previous session so I'd really like one this time.
Is there an unofficial mark scheme yet?
Original post by cowie
Is there an unofficial mark scheme yet?
Which board
Posted from TSR Mobile
Original post by C0balt
AQA unit 2 chem
Original post by cowie
AQA unit 2 chem
Oh ok I made one for edexcel :/
Original post by C0balt
Oh ok I made one for edexcel :/
Ah right don't worry!
Help please........ the ans is B
Which of these equations represents the reaction of sulphur dioxide with an excess of aqueous
sodium hydroxide?
A SO2 + NaOH ----> NaHSO3
B SO2 + 2NaOH -------> Na2SO3 + H2O
C SO2 + 2NaOH ------> Na2SO4 + H2O
D SO2 + 2NaOH -----> Na2SO4 + H2
Which of these equations represents the reaction of sulphur dioxide with an excess of aqueous
sodium hydroxide?
A SO2 + NaOH ----> NaHSO3
B SO2 + 2NaOH -------> Na2SO3 + H2O
C SO2 + 2NaOH ------> Na2SO4 + H2O
D SO2 + 2NaOH -----> Na2SO4 + H2
Help please ........
http://s11.postimg.org/980xvhyv7/table.jpg
The Ans is A......
http://s11.postimg.org/980xvhyv7/table.jpg
The Ans is A......
Original post by Shazzyroxz96
First write out the reaction, and balance it.
Find the molar ratios of NaCl to NaOH, H2 and Cl2.
You must make sure to have NaCl = 1 mol, since we're told that 58.5 kg of it is electrolysed, so do that and you'll end up with a new molar ratio.
Find the molar mass of the products and multiply this by the " new " molar ratio.
If you did everything correctly, you should end up with A as your answer. If not, I'd be happy to break it down further ^_^
Hope that helped!
Original post by Shazzyroxz96
Help please........ the ans is B
Which of these equations represents the reaction of sulphur dioxide with an excess of aqueous
sodium hydroxide?
A SO2 + NaOH ----> NaHSO3
B SO2 + 2NaOH -------> Na2SO3 + H2O
C SO2 + 2NaOH ------> Na2SO4 + H2O
D SO2 + 2NaOH -----> Na2SO4 + H2
Which of these equations represents the reaction of sulphur dioxide with an excess of aqueous
sodium hydroxide?
A SO2 + NaOH ----> NaHSO3
B SO2 + 2NaOH -------> Na2SO3 + H2O
C SO2 + 2NaOH ------> Na2SO4 + H2O
D SO2 + 2NaOH -----> Na2SO4 + H2
The keyword here is "excess". This should let you know that NaOH has to be the greater quantity, so you can eliminate Option A.
From B,C and D, break the reactants up into ions and see if you can arrange them to make the mentioned products.
SO2 --> S2+ and O2-
2NaOH --> 2Na+ and 2OH-
Hope that helps!
for this years chemistry as level exams what ums and grade would i be expecting if i got:
f321: around 46 marks
f332: 74ish
and full ums in coursework 40marks
much appreciated
f321: around 46 marks
f332: 74ish
and full ums in coursework 40marks
much appreciated
Original post by Skygon
First write out the reaction, and balance it.
Find the molar ratios of NaCl to NaOH, H2 and Cl2.
You must make sure to have NaCl = 1 mol, since we're told that 58.5 kg of it is electrolysed, so do that and you'll end up with a new molar ratio.
Find the molar mass of the products and multiply this by the " new " molar ratio.
If you did everything correctly, you should end up with A as your answer. If not, I'd be happy to break it down further ^_^
Hope that helped!
Find the molar ratios of NaCl to NaOH, H2 and Cl2.
You must make sure to have NaCl = 1 mol, since we're told that 58.5 kg of it is electrolysed, so do that and you'll end up with a new molar ratio.
Find the molar mass of the products and multiply this by the " new " molar ratio.
If you did everything correctly, you should end up with A as your answer. If not, I'd be happy to break it down further ^_^
Hope that helped!
If you dont mind can you please detail it to me? Thanks in Advance
Original post by Shazzyroxz96
If you dont mind can you please detail it to me? Thanks in Advance
Question 33, help please....... i dont understand statement 3
https://docs.google.com/viewer?a=v&pid=sites&srcid=cGVuYWJ1ci1pbnRsLm9yZ3x0ZWFjaGVyc3xneDo3YmY2ZDdkZWU3Mjc4MWMw
Ans is C,
https://docs.google.com/viewer?a=v&pid=sites&srcid=cGVuYWJ1ci1pbnRsLm9yZ3x0ZWFjaGVyc3xneDo3YmY2ZDdkZWU3Mjc4MWMw
Ans is C,
(edited 8 years ago)
Original post by C0balt
Thank you so so much
It was very comprehensible Help please ..........
http://postimg.org/image/8giq0huc9/full/
Ans is A
http://postimg.org/image/8giq0huc9/full/
Ans is A
Original post by Shazzyroxz96
Question 33, help please....... i dont understand statement 3
https://docs.google.com/viewer?a=v&pid=sites&srcid=cGVuYWJ1ci1pbnRsLm9yZ3x0ZWFjaGVyc3xneDo3YmY2ZDdkZWU3Mjc4MWMw
Ans is C,
https://docs.google.com/viewer?a=v&pid=sites&srcid=cGVuYWJ1ci1pbnRsLm9yZ3x0ZWFjaGVyc3xneDo3YmY2ZDdkZWU3Mjc4MWMw
Ans is C,
Tricky to explain, but when dissociation occurs there are "two" molecules of gas present per pcl5 within the sryinge. When dissociation does not occur there is only "one" molecule of gas in the syringe
Hence, there is less gas when dissociation does not occur
(edited 8 years ago)
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