[champions_2012]

1a) Magnesium ions from the dissolved magnesium sulfate make the water hard (1). When sodium carbonate is added the magnesium ions from magnesium carbonate (1) which is a solid precipitate taking the magnesium ions out of the solution (1).
b) Result is anomalous/ doesn’t fit general pattern (1)
c) Water would boil off and there would no longer be 100g (1)
ii) 68 degrees C (1)
c) Two straight lines (1) which join at a peak (1) (as opposed to curve)
2 a) They are metals (1), react strongly with water (1)
b) Two elements in same box (1), some elements in same group had different properties (1), pattern falls apart after 18 elements (1) etc.
c) Left gaps (1) so undiscovered elements could be put into the table when they are discovered (1)
3 a) Transition metals unreactive compared to other metals (1) hard (1) shiny (1) (Max 2)
b) All have similar/same number of outer shell electrons (1) but 3rd shell only partly filled (1)
4 a) Hydrogen ion (1)
b) pH of weak acid higher (1) as less hydrogen ions in same concentration (which cause acidity in solution) (1)
c) i) Strong alkali, weak acid (1)
c) ii) 0.61 mol/dm3 (3)
ii) 12g (2)
5 a) i) Bubble gas through limewater (1) and limewater should go cloudy (1)
ii) Wrong (1), as white precipitate did not dissolve again when excess sodium hydroxide added (1)
iii) Right (1), as white precipitate formed after silver nitrate added (1)
b) i) Atomic Absorption Spectroscopy (1), Mass spectrometry (1) (Max 1)
ii) Measure smaller changes in the amount of lead (1)
6. Chlorine atoms smaller (1), so higher force of attraction between outer shell electrons and nucleus (1), so electrons gained more easily when they react (1)
7 a) -810 kJ/mol (3)
b) More energy released by bond making (1) than used for bond breaking (1)
c) Spark provides activation energy (1)

[flyhigh99]

[QUOTE=champions_2012;37731958]1a) Magnesium ions from the dissolved magnesium sulfate make the water hard (1). When sodium carbonate is added the magnesium ions from magnesium carbonate (1) which is a solid precipitate taking the magnesium ions out of the solution (1).
b) Result is anomalous/ doesn’t fit general pattern (1)
ii) 68 degrees C (1)
c) Two straight lines (1) which join at a peak (1) (as opposed to curve)

In question one, You forgot B

why did they not use 100 C

[champions_2012]

[QUOTE=flyhigh99;37732056]

(Original post by champions_2012)
1a) Magnesium ions from the dissolved magnesium sulfate make the water hard (1). When sodium carbonate is added the magnesium ions from magnesium carbonate (1) which is a solid precipitate taking the magnesium ions out of the solution (1).
b) Result is anomalous/ doesn’t fit general pattern (1)
ii) 68 degrees C (1)
c) Two straight lines (1) which join at a peak (1) (as opposed to curve)

In question one, You forgot B

why did they not use 100 C

Thanks

[Aarongreatbanks]

1a) The water is hard because it contains magnesium ions. When sodium carbonate is added the magnesium ions from magnesium carbonate which is a solid precipitate taking the magnesium ions out of the solution (3)
b) Result is anomalous(1)
ii) 68 degrees C (1)
iii) because the water would evaporate
c) Because it is a curve and as the temperature increases the solubility doesn't always increase. Also, the solbuility increaes to 68 C and then falls when it should contiue going up (2)
2 a) They are metals and they all have one electron in their outer shell (2)
b) Two elements in same box ,some elements in same group had different properties, metals and non metals in same group.(3)
c) Left gaps so undiscovered elements could be put into the table easily when they are discovered (2)
3 a) Transition metals are strong,malleable and don't corrode easily (Max 2)
b) The electrons of transintion metals are filing up the 3rd enegry levels after there are two in the 4th shell, meaning that they usually have the same number of electrons in their outer energy level, making them have similar properties (2)
4 a) H+(1)
b) pH of weak acid higher and the pH of a strong acid is lower as it's fully ionised in water so there is more hydrogen ions in solution so they have lower pH (2)
c) 0.61 mol/dm3 (3)
ii) 12g (2)
5 a) i) Bubble gas through limewater and limewater should go cloudy (2)
ii) Wrong, as ammonia gas did not form when sodium hydroxide was added (2)
iii) Right , as white precipitate formed after silver nitrate added (2)
b) i) Atom Absorption Spectroscopy (1)
ii) Measure smaller amounts (1)
6. Chlorine atoms smaller , so higher force of attraction between outer shell electrons and nucleus , so electrons gained more easily when they react (3)
7 a) -810 kJ/mol (3)
b) More energy released by making new bonds than required for breaking existing bonds (1)
c) Because it provides the activation energy (1)

How do you think i did?

[Aarongreatbanks]

Will i get the mark for writting atom absortion spectroscopy, not atomic absorbtion spectroscopy

[metaltron]

(Original post by Aarongreatbanks)
1a) The water is hard because it contains magnesium ions. When sodium carbonate is added the magnesium ions from magnesium carbonate which is a solid precipitate taking the magnesium ions out of the solution (3)
b) Result is anomalous(1)
ii) 68 degrees C (1)
iii) because the water would evaporate
c) Because it is a curve and as the temperature increases the solubility doesn't always increase. Also, the solbuility increaes to 68 C and then falls when it should contiue going up (2)
2 a) They are metals and they all have one electron in their outer shell (2)
b) Two elements in same box ,some elements in same group had different properties, metals and non metals in same group.(3)
c) Left gaps so undiscovered elements could be put into the table easily when they are discovered (2)
3 a) Transition metals are strong,malleable and don't corrode easily (Max 2)
b) The electrons of transintion metals are filing up the 3rd enegry levels after there are two in the 4th shell, meaning that they usually have the same number of electrons in their outer energy level, making them have similar properties (2)
4 a) H+(1)
b) pH of weak acid higher and the pH of a strong acid is lower as it's fully ionised in water so there is more hydrogen ions in solution so they have lower pH (2)
c) 0.61 mol/dm3 (3)
ii) 12g (2)
5 a) i) Bubble gas through limewater and limewater should go cloudy (2)
ii) Wrong, as ammonia gas did not form when sodium hydroxide was added (2)
iii) Right , as white precipitate formed after silver nitrate added (2)
b) i) Atom Absorption Spectroscopy (1)
ii) Measure smaller amounts (1)
6. Chlorine atoms smaller , so higher force of attraction between outer shell electrons and nucleus , so electrons gained more easily when they react (3)
7 a) -810 kJ/mol (3)
b) More energy released by making new bonds than required for breaking existing bonds (1)
c) Because it provides the activation energy (1)

How do you think i did?

Mark it yourself, the mark scheme's there for a reason.

[Hajrah94]

For 5bi can you get a mark for NMR?


This was posted from The Student Room's iPhone/iPad App

[Annie7]

(Original post by Aarongreatbanks)
1a) The water is hard because it contains magnesium ions. When sodium carbonate is added the magnesium ions from magnesium carbonate which is a solid precipitate taking the magnesium ions out of the solution (3)
b) Result is anomalous(1)
ii) 68 degrees C (1)
iii) because the water would evaporate
c) Because it is a curve and as the temperature increases the solubility doesn't always increase. Also, the solbuility increaes to 68 C and then falls when it should contiue going up (2)
2 a) They are metals and they all have one electron in their outer shell (2)
b) Two elements in same box ,some elements in same group had different properties, metals and non metals in same group.(3)
c) Left gaps so undiscovered elements could be put into the table easily when they are discovered (2)
3 a) Transition metals are strong,malleable and don't corrode easily (Max 2)
b) The electrons of transintion metals are filing up the 3rd enegry levels after there are two in the 4th shell, meaning that they usually have the same number of electrons in their outer energy level, making them have similar properties (2)
4 a) H+(1)
b) pH of weak acid higher and the pH of a strong acid is lower as it's fully ionised in water so there is more hydrogen ions in solution so they have lower pH (2)
c) 0.61 mol/dm3 (3)
ii) 12g (2)
5 a) i) Bubble gas through limewater and limewater should go cloudy (2)
ii) Wrong, as ammonia gas did not form when sodium hydroxide was added (2)
iii) Right , as white precipitate formed after silver nitrate added (2)
b) i) Atom Absorption Spectroscopy (1)
ii) Measure smaller amounts (1)
6. Chlorine atoms smaller , so higher force of attraction between outer shell electrons and nucleus , so electrons gained more easily when they react (3)
7 a) -810 kJ/mol (3)
b) More energy released by making new bonds than required for breaking existing bonds (1)
c) Because it provides the activation energy (1)

How do you think i did?

Wouldn't like to be you on results day .... hahah im joking looks like someone may have got full marks

[Fas]

i think for 5a) part ii) i put it was right, but loads of people said it was incorrect cos the silver nitrate reacted with the chloride in the hydrochloric acid?

[Aarongreatbanks]

will i get the mark for atom absortion spectroscopy not ATOMIC absorbtion spectroscopy

[Cllr Ben AM]

Good Morning my esteemed fellow pragmatic politicians, including the far left Felix Dzerhinsky. How did all of you, all of which who help to fabricate the rich tapestry of human kind, ascertain the C3 Examination?

Could you all list your thoughts to this response, detailing them with an air of sophisticated analysis, shrowded in amidst of aristocracy.

[felixdez]

This is the man felix dzherehinsky himself! Rasputin 12...
The exam went well and dont you think it was fitting that one of the answers was twelve for the legend that is Gregori Rasputin.
What hidden significance may this have maybe a 5 marker in the history exam on Rasputin!

[Cllr Ben AM]

(Original post by felixdez)
this is the man felix dzherehinsky himself! Rasputin 12...
The exam went well and dont you think it was fitting that one of the answers was twelve for the legend that is gregori rasputin.
What hidden significance may this have maybe a 5 marker in the history exam on rasputin!

ohhhhhh rasputinnnnn. Could you inform me of the significance of this piece of pragmatic information, my fellow aristocrat?

[felixdez]

Shrowded in a mist of aristocracy charles and his men marched to scotland

[ZedZFury]

I think i put 0.62, do you thin that will get the mark??

Thanks for posting ^^

[James_01]

(Original post by Cllr Ben AM)
Good Morning my esteemed fellow pragmatic politicians, including the far left Felix Dzerhinsky. How did all of you, all of which who help to fabricate the rich tapestry of human kind, ascertain the C3 Examination?

Could you all list your thoughts to this response, detailing them with an air of sophisticated analysis, shrowded in amidst of aristocracy.

As young historian of the year it is my belief that todays exam was piss.

[Aarongreatbanks]

will i get the mark for atom absorption spectroscopry as its atomic absorbtion spectroscopy

[Fas]

yes you should get the mark Mass Spectroscopy was also correct :P

[Zigggyy.]

(Original post by James_01)
right well somones clearly gay

Woah there, there's no need to be so harsh about it.

[Zigggyy.]

For the question about 100 degrees, would you get a mark for saying the temperature is too high?

What do people thing grade boundaries are likely to be? :')

And for question 2 about group 1, could you say, they all react with water to form an alkaline solution and they have have 1 electron in the outermost shell?