This topic is locked
Can anyone remember what Q14 was? Supposedly that was the trickiest along with Q3 and Q17.
1
Discuss your answers...
Started by Ally, Jun 02 2004 12:05 PM
80 replies to this topic
#61
-
- Moderators
-
- 2,912 posts
HSN Legend
- Interests:Just finished 1st year at uni studying medicine.
- Gender:Male
Posted 05 June 2004 - 11:26 PM
| Help yourselves and others - HSN Contribute | Spread the Word!
| PPA Hints | Chemistry Formulae | H Maths Links |
| PPA Hints | Chemistry Formulae | H Maths Links |
#62
-
- Moderators
-
- 1,497 posts
Fully Fledged Genius
- Location:Cambridge (Term Time), Bearsden (Glasgow) Non Term Time
- Gender:Male
Posted 06 June 2004 - 03:16 PM
What did you put as your answer to "Why is the aromatic ring stable?"
Click here to visit the Bearsden Academy Website
If you can keep your head when all about you
Are losing theirs and blaming it on you,
If you can trust yourself when all men doubt you
But make allowance for their doubting too,
If you can wait and not be tired by waiting,
Or being lied about, don't deal in lies,
Or being hated, don't give way to hating,
And yet don't look too good, nor talk too wise:
Yours is the Earth and everything that's in it,
And--which is more--you'll be a Man, my son!
If you can keep your head when all about you
Are losing theirs and blaming it on you,
If you can trust yourself when all men doubt you
But make allowance for their doubting too,
If you can wait and not be tired by waiting,
Or being lied about, don't deal in lies,
Or being hated, don't give way to hating,
And yet don't look too good, nor talk too wise:
Yours is the Earth and everything that's in it,
And--which is more--you'll be a Man, my son!
#63
-
- Members
-
- 334 posts
Top of the Class
Posted 06 June 2004 - 03:17 PM
thats the bad thing about Higher Chemistry u cant take ur answer paper out unless u want 0 marks
#64
-
- Moderators
-
- 2,912 posts
HSN Legend
- Interests:Just finished 1st year at uni studying medicine.
- Gender:Male
Posted 06 June 2004 - 05:55 PM
I said that it has delocalised electrons and just wrote about them... 
I think you could take a paper but you would have to ask your teacher - I may do that tomorrow.
I think you could take a paper but you would have to ask your teacher - I may do that tomorrow.
| Help yourselves and others - HSN Contribute | Spread the Word!
| PPA Hints | Chemistry Formulae | H Maths Links |
| PPA Hints | Chemistry Formulae | H Maths Links |
#65
-
- Members
-
- 334 posts
Top of the Class
Posted 06 June 2004 - 07:23 PM
| QUOTE (werlop @ Jun 6 2004, 03:16 PM) |
| What did you put as your answer to "Why is the aromatic ring stable?" |
Aromatics are very stable due to the ring of delocalised Pi electrons.
#66
-
- Members
-
- 334 posts
Top of the Class
Posted 06 June 2004 - 07:24 PM
| QUOTE (ally @ Jun 6 2004, 05:55 PM) |
| I said that it has delocalised electrons and just wrote about them... I think you could take a paper but you would have to ask your teacher - I may do that tomorrow. |
the most your teacher will have is 9 copies
#67
-
- Moderators
-
- 1,497 posts
Fully Fledged Genius
- Location:Cambridge (Term Time), Bearsden (Glasgow) Non Term Time
- Gender:Male
Posted 06 June 2004 - 09:06 PM
| QUOTE (james1 @ Jun 6 2004, 07:24 PM) | ||
the most your teacher will have is 9 copies |
Yeah, the paper's come in packs of 10, but if your really desparate, you could mabye get a photocopy...then again there is copyright and all that..
Click here to visit the Bearsden Academy Website
If you can keep your head when all about you
Are losing theirs and blaming it on you,
If you can trust yourself when all men doubt you
But make allowance for their doubting too,
If you can wait and not be tired by waiting,
Or being lied about, don't deal in lies,
Or being hated, don't give way to hating,
And yet don't look too good, nor talk too wise:
Yours is the Earth and everything that's in it,
And--which is more--you'll be a Man, my son!
If you can keep your head when all about you
Are losing theirs and blaming it on you,
If you can trust yourself when all men doubt you
But make allowance for their doubting too,
If you can wait and not be tired by waiting,
Or being lied about, don't deal in lies,
Or being hated, don't give way to hating,
And yet don't look too good, nor talk too wise:
Yours is the Earth and everything that's in it,
And--which is more--you'll be a Man, my son!
#68
-
- Members
-
- 131 posts
Site Swot
Posted 15 June 2004 - 11:09 PM
Answers I put to various questions in a random order:
Aromatic ring is stable due to the delocalised electrons.
I put ethyne for the nmr spectrum question (I drew a diagram of the substance based on the lines, so I'm fairly sure it's ethyne).
Can't remember for the eletrolysis...was in the 50s though.
Vitamin C was in excess, and so all the iodine reacted.
For the mag ribbon question, I inverted the graduated tube into water, with the funnel going into the tube, with magnesium below it. To calculate the molar volume, I put that you would measure the mass of the tube when empty (daft...it's the mass lost in the solution...oh well) then full. Then use:
x= (volume collected * 2) / mass when full (should have been mass lost)... where 2 is the gram formula mass of one mole of hydrogen gas.
I put the sulphuric acid into the neutraliser, and put sulphur dioxide. I was swithering between trioxide and dioxide, but chose dioxide because it's one of the first reactants in the contact process (if sulphur is discounted), and dioxide seemed more realistic based on the other reactions taking place. Also, dioxide is more commonly a by-product than trioxide (excuse me if it wasn't actually a by-product; I'm trying to remember from two weeks ago here!) Then there's also the fact that the process just said "reactions", not oxidation or anything else that would imply that ONLY SO3 is used. Therefore in the reactions stage, the entire conversion from sulphur dioxide to sulphuric acid could have taken place. Pretty vague question, if you ask me. Hopefully the SQA will take the two into account and give the correct answer for BOTH, since both can be justified.
I think I put displacement, but I can't remember for sure what the question even was!
Can't remember what gas I put other than SO2.
I got somewhere in the -53/-54 kJ/mol range. Somewhere around there.
The water molecules would be attracted to any of the oxygens I think.
Can't remember the (3+4) multiple choice question...
--------------------------------
What did people put for the number of atoms in 8g of phosphorus-32? I put 6.02*10^23, but I'm not 100% sure. Here's my reasons:
Phosphorus is molecular, with 4 atoms per molecule. So there are 4*L atoms, each weighing 32g in one mole. However, since it's only 8g, it's 4*L*8/32 = L therefore 6.02*10^23 atoms. Correct?
Overall I found the paper to be quite easy, especially when compared to last year's. I finished with exactly an hour left, so I had plenty time to check over. The multiple choice was quite straightforward too.
Aromatic ring is stable due to the delocalised electrons.
I put ethyne for the nmr spectrum question (I drew a diagram of the substance based on the lines, so I'm fairly sure it's ethyne).
Can't remember for the eletrolysis...was in the 50s though.
Vitamin C was in excess, and so all the iodine reacted.
For the mag ribbon question, I inverted the graduated tube into water, with the funnel going into the tube, with magnesium below it. To calculate the molar volume, I put that you would measure the mass of the tube when empty (daft...it's the mass lost in the solution...oh well) then full. Then use:
x= (volume collected * 2) / mass when full (should have been mass lost)... where 2 is the gram formula mass of one mole of hydrogen gas.
I put the sulphuric acid into the neutraliser, and put sulphur dioxide. I was swithering between trioxide and dioxide, but chose dioxide because it's one of the first reactants in the contact process (if sulphur is discounted), and dioxide seemed more realistic based on the other reactions taking place. Also, dioxide is more commonly a by-product than trioxide (excuse me if it wasn't actually a by-product; I'm trying to remember from two weeks ago here!) Then there's also the fact that the process just said "reactions", not oxidation or anything else that would imply that ONLY SO3 is used. Therefore in the reactions stage, the entire conversion from sulphur dioxide to sulphuric acid could have taken place. Pretty vague question, if you ask me. Hopefully the SQA will take the two into account and give the correct answer for BOTH, since both can be justified.
I think I put displacement, but I can't remember for sure what the question even was!
Can't remember what gas I put other than SO2.
I got somewhere in the -53/-54 kJ/mol range. Somewhere around there.
The water molecules would be attracted to any of the oxygens I think.
Can't remember the (3+4) multiple choice question...
--------------------------------
What did people put for the number of atoms in 8g of phosphorus-32? I put 6.02*10^23, but I'm not 100% sure. Here's my reasons:
Phosphorus is molecular, with 4 atoms per molecule. So there are 4*L atoms, each weighing 32g in one mole. However, since it's only 8g, it's 4*L*8/32 = L therefore 6.02*10^23 atoms. Correct?
Overall I found the paper to be quite easy, especially when compared to last year's. I finished with exactly an hour left, so I had plenty time to check over. The multiple choice was quite straightforward too.
#69
-
- Members
-
- 334 posts
Top of the Class
Posted 16 June 2004 - 08:18 AM
did u get a question on nmr? 
thats AH
thats AH
#70
-
- Members
-
- 334 posts
Top of the Class
Posted 16 June 2004 - 08:23 AM
no it is 0.25L which will be 1.51*10^23 atoms correct to 3sf
#71
-
- Members
-
- 131 posts
Site Swot
Posted 16 June 2004 - 03:29 PM
I realised it was wrong as I posted it. I forgot that there's 4 atoms in the 8g sample...oh well. nmr spectrum was the chemical shift question.
#72
-
- Members
-
- 3 posts
Newbie
Posted 24 June 2004 - 11:10 AM
the answer for the last question was definetly propyne and no ethyne.
#73
-
- Members
-
- 131 posts
Site Swot
Posted 25 June 2004 - 09:57 PM
Maybe it was. I can't remember for sure so I'm not really bothered. I do remember drawing out the molecule to make sure, so I dunno. If I could see the paper, then...
#74
-
- Moderators
-
- 4,252 posts
Ruler (but not owner) of hsn
- Location:kilmarnock(ok kilmaurs)
- Interests:programming, exercising, brass band, using this board
- Gender:Male
Posted 26 June 2004 - 06:06 PM
well i stil think it was ethyne but then i would as i wrote that answer as did a number of my friends and a number on this board. HOWEVER, it does seem strange that equal numbers also think that it was propyne so who can really tell enless someone on the board has a parent marking the paper this year 
If i am not here i am somewhere else
#75
-
- Members
-
- 334 posts
Top of the Class
Posted 26 June 2004 - 10:38 PM
if u tell me the question i can help
#76
-
- Members
-
- 180 posts
Site Swot
- Location:Edinburgh
Posted 27 June 2004 - 09:05 AM
| QUOTE (james1 @ Jun 26 2004, 11:38 PM) |
| well i stil think it was ethyne but then i would as i wrote that answer as did a number of my friends and a number on this board. HOWEVER, it does seem strange that equal numbers also think that it was propyne so who can really tell enless someone on the board has a parent marking the paper this year |
My chemistry teacher did the question to show me and it was PROPYNE (I wrote ethyne as well) and on the graph thingy there should have been seven lines.
uh ohLaura xxx
#77
-
- Members
-
- 334 posts
Top of the Class
Posted 27 June 2004 - 09:34 AM
is this a question on identifying a chemical based on its chemical shift graph against intensity of transmitted radiation
AH paper also had that one right at the very end
AH paper also had that one right at the very end
#78
-
- Members
-
- 180 posts
Site Swot
- Location:Edinburgh
Posted 27 June 2004 - 09:47 AM
| QUOTE (james1 @ Jun 27 2004, 10:34 AM) |
| is this a question on identifying a chemical based on its chemical shift graph against intensity of transmitted radiation AH paper also had that one right at the very end |
'tis! And I completely screwed it up!
#79
-
- Moderators
-
- 4,252 posts
Ruler (but not owner) of hsn
- Location:kilmarnock(ok kilmaurs)
- Interests:programming, exercising, brass band, using this board
- Gender:Male
Posted 27 June 2004 - 02:02 PM
actually little_Minx that was what i said and not james 1 but its no big deal really (thats the 1st one by the way)
(thats the 1st one by the way)
If i am not here i am somewhere else
#80
-
- Moderators
-
- 2,912 posts
HSN Legend
- Interests:Just finished 1st year at uni studying medicine.
- Gender:Male
Posted 27 June 2004 - 02:49 PM
| QUOTE (little_minx @ Jun 27 2004, 09:05 AM) | ||
My chemistry teacher did the question to show me and it was PROPYNE (I wrote ethyne as well) and on the graph thingy there should have been seven lines. uh ohLaura xxx |
Wohoo!
Thats what I got for my answers.
| Help yourselves and others - HSN Contribute | Spread the Word!
| PPA Hints | Chemistry Formulae | H Maths Links |
| PPA Hints | Chemistry Formulae | H Maths Links |
1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users
