AQA Chemistry GCSE C1 Higher - Unofficial Mark Scheme Period.
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Original post by Callnitram
No there was a separate question on cast iron for pylons and Aluminium instead of copper for overhead wires!
Would saying aluminium is lighter than copper gain me a mark?
Anyone else agree that mass number is protons + neutrons not protons + electrons?
Original post by 11Jason11
I have made a better unofficial mark scheme
well then post it then -_-
Original post by Visha99
Got a 56 is that defo an A*?
are you tryna show off or something
of course that's an a*!Original post by isthatmatilda
well then post it then -_-
http://www.thestudentroom.co.uk/showthread.php?t=3393159 I have images of the graphs etc.
Yes, you are right.
Posted from TSR Mobile
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Original post by 11Jason11
http://www.thestudentroom.co.uk/showthread.php?t=3393159 I have images of the graphs etc.
woooh thanks
http://www.thestudentroom.co.uk/showthread.php?t=3393159 Check out my unofficial mark scheme guys
Original post by ladyrailly
Anyone else agree that mass number is protons + neutrons not protons + electrons?
yes definitely but isn't that what it says on the unofficial mark scheme anyways?
Original post by Decklan
Atomic structure
What is atomic number? (1 mark)
The number of protons.
What is atomic mass? (1 mark)
Number of protons and neutrons.
Why is there no overall charge? (2 marks)
Same number of protons and electrons, balancing the charges.
Why is Chlorine and Fluorine in the same group? (2 marks)
Because they both have 7 electrons in the outer shell.
Identify the element (1 mark)
Sulphur.
Metal and non metals reacting would form particles called ions (1 mark)
Non metals reacting would form particles called molecules. (1 mark)
Limestone question
Thermal decomposition. (1 mark)
Alkali. (1 mark)
Water. (1 mark)
Carbonate (1 mark).
Mortar&Aggregate
Draw 2 lines of best fit. (2 marks)
Describe one way how they could improve the accuracy of the test? (2 mark)
Repeating the test, to calculate a mean. Improving accuracy of points on the graph.
Force required for 0 grams of aggregate (2 marks)
Had to extend the line of best fit to 0, which is 44 newtons.
Why is his conclusion wrong? (3 marks)
Because the force did increase up until reaching 400 grams of aggregate, however after 400 grams of aggregate used the force decreased with the mass of 500, 600, 700.
Atmosphere
Explain why there are many theories involving how simple life were formed? (1 mark)
Because there's no conclusive evidence supporting one theory.
6 marker on the atmosphere
-Volcanic activity released carbon dioxide and also water vapour in the air, increasing levels of both in the early atmosphere.
-Earth cooled, decreasing levels of water vapour, and forming oceans.
-Carbon dioxide dissolves in the oceans, decreasing levels of carbon dioxide.
-Plant life do photosynthesis decreasing levels of carbon dioxide in the air and also increase levels of oxygen.
Metals and their uses
Why do we need to do stage 1 which is separation ? (2 marks)
Because separation of the ore, means that the ore would now be more concentrated of that metal and therefore allowing it to be more economical.
Why is cast iron not used for over head cables? (1 mark)
Can rust easily.
How is cast iron formed? (2 marks)
Carbon is removed from molten iron by blowing oxygen into it. The oxygen reacts with the carbon, producing carbon monoxide and carbon dioxide, which escape from the molten metal. Enough oxygen is used to achieve steel with the desired carbon content.
Property of Aluminium (1 mark)
Low density
Transition metals and how can you tell copper is a transitional metal and not Aluminium. (3 marks?)
Aluminium is in group 3, and group 3 metals are not transitional metals. Copper is in the middle section of the periodic table where transitional metals are located.
Crude oil
Fractioning columns ( 4 marks)
Crude oil has a mixture of hydrocarbons.
Crude oil is vaporised.
Crude oil is condensed.
At different boiling points and collected.
Why is limestone suspension used and which environmental factor does it decrease? (3 marks)
Sulphur dioxide forming sulphuric acid reacting with the limestone as a neutralisation reaction, decreasing levels of sulphur dioxide in the air which as a result less acid rain.
Finish cracking (1 mark)
C2H4
Polymerisation drawing (3 marks)
Removal of double bond.
Adding a bond on the brackets. -()-
Smart polymer property (1 mark)
Shape memory.
Vegetable oils
Weird question poorly worded, since it was in reference for food and fuel.
Why are vegetable oils important? (1 mark)
Provide high energy.
2 main stages (2 marks)
-Crushed
-Oil removed by pressing or distillation.
One use of vegetable oil over than using water for cooking? (2 marks)
-Vegetable oil has a higher boiling point than water, this means that the food will be cooked at high temperatures so making it quicker.
-Different tastes
-Wider variety of flavours.
Emulsifier (4 marks)
-Hydrophilic head is attached to the water.
-Hydrophobic tail is attached to the oil.
-Stops separation of both liquids.
Full paper is here, surprised myself with the memory that was put into this. Be sure to rep this post. Hope you've done well, cheers <3.
What is atomic number? (1 mark)
The number of protons.
What is atomic mass? (1 mark)
Number of protons and neutrons.
Why is there no overall charge? (2 marks)
Same number of protons and electrons, balancing the charges.
Why is Chlorine and Fluorine in the same group? (2 marks)
Because they both have 7 electrons in the outer shell.
Identify the element (1 mark)
Sulphur.
Metal and non metals reacting would form particles called ions (1 mark)
Non metals reacting would form particles called molecules. (1 mark)
Limestone question
Thermal decomposition. (1 mark)
Alkali. (1 mark)
Water. (1 mark)
Carbonate (1 mark).
Mortar&Aggregate
Draw 2 lines of best fit. (2 marks)
Describe one way how they could improve the accuracy of the test? (2 mark)
Repeating the test, to calculate a mean. Improving accuracy of points on the graph.
Force required for 0 grams of aggregate (2 marks)
Had to extend the line of best fit to 0, which is 44 newtons.
Why is his conclusion wrong? (3 marks)
Because the force did increase up until reaching 400 grams of aggregate, however after 400 grams of aggregate used the force decreased with the mass of 500, 600, 700.
Atmosphere
Explain why there are many theories involving how simple life were formed? (1 mark)
Because there's no conclusive evidence supporting one theory.
6 marker on the atmosphere
-Volcanic activity released carbon dioxide and also water vapour in the air, increasing levels of both in the early atmosphere.
-Earth cooled, decreasing levels of water vapour, and forming oceans.
-Carbon dioxide dissolves in the oceans, decreasing levels of carbon dioxide.
-Plant life do photosynthesis decreasing levels of carbon dioxide in the air and also increase levels of oxygen.
Metals and their uses
Why do we need to do stage 1 which is separation ? (2 marks)
Because separation of the ore, means that the ore would now be more concentrated of that metal and therefore allowing it to be more economical.
Why is cast iron not used for over head cables? (1 mark)
Can rust easily.
How is cast iron formed? (2 marks)
Carbon is removed from molten iron by blowing oxygen into it. The oxygen reacts with the carbon, producing carbon monoxide and carbon dioxide, which escape from the molten metal. Enough oxygen is used to achieve steel with the desired carbon content.
Property of Aluminium (1 mark)
Low density
Transition metals and how can you tell copper is a transitional metal and not Aluminium. (3 marks?)
Aluminium is in group 3, and group 3 metals are not transitional metals. Copper is in the middle section of the periodic table where transitional metals are located.
Crude oil
Fractioning columns ( 4 marks)
Crude oil has a mixture of hydrocarbons.
Crude oil is vaporised.
Crude oil is condensed.
At different boiling points and collected.
Why is limestone suspension used and which environmental factor does it decrease? (3 marks)
Sulphur dioxide forming sulphuric acid reacting with the limestone as a neutralisation reaction, decreasing levels of sulphur dioxide in the air which as a result less acid rain.
Finish cracking (1 mark)
C2H4
Polymerisation drawing (3 marks)
Removal of double bond.
Adding a bond on the brackets. -()-
Smart polymer property (1 mark)
Shape memory.
Vegetable oils
Weird question poorly worded, since it was in reference for food and fuel.
Why are vegetable oils important? (1 mark)
Provide high energy.
2 main stages (2 marks)
-Crushed
-Oil removed by pressing or distillation.
One use of vegetable oil over than using water for cooking? (2 marks)
-Vegetable oil has a higher boiling point than water, this means that the food will be cooked at high temperatures so making it quicker.
-Different tastes
-Wider variety of flavours.
Emulsifier (4 marks)
-Hydrophilic head is attached to the water.
-Hydrophobic tail is attached to the oil.
-Stops separation of both liquids.
Full paper is here, surprised myself with the memory that was put into this. Be sure to rep this post. Hope you've done well, cheers <3.
was it 44 or 144N?
Original post by metrize
Wasnt the element oxygen
Yeah that's what I put, if I remember correctly it was 2,8,6 which is 16 = oxygen
on the one about concrete for the second answer i put it would be a better result if they did the test more times, thus getting a wider range for results. Do you think i might get a mark?
how did everyone find this paper? easy or harder than usual
That bit about the electrons is wrong. The atomic number is also known as the proton number so...sorry mate!
Original post by jamestg
Atomic structure
What is atomic number? (1 mark)
IT'S NUMBER OF ELECTRONS
PROTONS IS ON THE PERIODIC TABLE THEY GIVE, AND THERE WAS A SIMILAR QUESTION ON ANOTHER PAPER AND IT SAID DO NOT ACCEPT PROTONS IF I REMEMBER CORRECTLY
What is atomic mass? (1 mark)
Number of protons and electrons.
Why is there no overall charge? (2 marks)
Same number of protons and electrons, balancing the charges.
Why is Chlorine and Fluorine in the same group? (2 marks)
Because they both have 7 electrons in the outer shell.
Identify the element (1 mark)
Sulphur.
Metal and non metals reacting would form particles called ions (1 mark)
Non metals reacting would form particles called MOLECULES. (1 mark)
Limestone question
CALCIUM CARBONATE (1 mark)
THERMAL DECOMPOSTION (1 mark)
Water. (1 mark)
ALKALI (1 mark).
Mortar&Aggregate
Draw 2 lines that touch. (2 marks)
Describe one way how they could improve the accuracy of the test? (2 mark)
Make sure the concrete beam have the same contact surface on one block with the other block, ensuring a fair test.
Force required for 0 grams of aggregate (2 marks)
Had to extend the line of best fit to 0, which is 44 newtons.
Why is his conclusion wrong? (3 marks)
Because the force did increase up until reaching 400 grams of aggregate, however after 400 grams of aggregate used the force decreased with the mass of 500, 600, 700.
Atmosphere
Explain why there are many theories involving how simple life were formed? (1 mark)
Because there's no conclusive evidence supporting one theory.
6 marker on the atmosphere
-Volcanic activity released carbon dioxide and also water vapour in the air, increasing levels of both in the early atmosphere.
-Earth cooled, decreasing levels of water vapour, and forming oceans.
-Carbon dioxide dissolves in the oceans, decreasing levels of carbon dioxide.
-Plant life do photosynthesis decreasing levels of carbon dioxide in the air and also increase levels of oxygen.
Metals and their uses
Why do we need to do stage 1 which is separation ? (2 marks)
Because separation of the ore, means that the ore would now be more concentrated of that metal and therefore allowing it to be more economical.
Why is cast iron not used for over head cables? (1 mark)
Too soft.
How is cast iron formed? (2 marks)
4% carbon in the cast iron reacts with oxygen at high temperatures, forming carbon dioxide.
Property of Aluminium (1 mark)
Low density
Transition metals and how can you tell copper is a transitional metal and not Aluminium. (3 marks?)
Aluminium is in group 3, and group 3 metals are not transitional metals. Copper is in the middle section of the periodic table where transitional metals are located.
Crude oil
Fractioning columns ( 4 marks)
Crude oil has a mixture of hydrocarbons.
Crude oil is vaporised.
Crude oil is condensed.
At different boiling points and collected.
Why is limestone suspension used and which environmental factor does it decrease? (3 marks)
Sulphur dioxide forming sulphuric acid reacting with the limestone, decreasing levels of sulphur dioxide in the air, DECREASING THE AMOUNT OF ACID RAIN
Finish cracking (1 mark)
C2H4
Polymerisation drawing (3 marks)
Removal of double bond.
Adding a bond on the brackets. -()-
Smart polymer property (1 mark)
MALLEBALE, STRONG, LIGHT (YOU ONLY NEED ONE)
Vegetable oils
Weird question poorly worded, since it was in reference for food and fuel.
Why are vegetable oils important? (1 mark)
Conservation of non renewable sources?
2 main stages (2 marks)
-Crushed
-Oil removed by pressing
One use of vegetable oil over than using water for cooking? (2 marks)
Vegetable oil has a higher boiling point than water, this means that the food will be cooked at high temperatures so making it quicker.
Emulsifier (4 marks)
-Hydrophilic head is attached to the water.
-Hydrophobic tail is attached to the oil.
-Stops separation of both liquids.
I've done a few corrections.
What is atomic number? (1 mark)
IT'S NUMBER OF ELECTRONS
PROTONS IS ON THE PERIODIC TABLE THEY GIVE, AND THERE WAS A SIMILAR QUESTION ON ANOTHER PAPER AND IT SAID DO NOT ACCEPT PROTONS IF I REMEMBER CORRECTLY
What is atomic mass? (1 mark)
Number of protons and electrons.
Why is there no overall charge? (2 marks)
Same number of protons and electrons, balancing the charges.
Why is Chlorine and Fluorine in the same group? (2 marks)
Because they both have 7 electrons in the outer shell.
Identify the element (1 mark)
Sulphur.
Metal and non metals reacting would form particles called ions (1 mark)
Non metals reacting would form particles called MOLECULES. (1 mark)
Limestone question
CALCIUM CARBONATE (1 mark)
THERMAL DECOMPOSTION (1 mark)
Water. (1 mark)
ALKALI (1 mark).
Mortar&Aggregate
Draw 2 lines that touch. (2 marks)
Describe one way how they could improve the accuracy of the test? (2 mark)
Make sure the concrete beam have the same contact surface on one block with the other block, ensuring a fair test.
Force required for 0 grams of aggregate (2 marks)
Had to extend the line of best fit to 0, which is 44 newtons.
Why is his conclusion wrong? (3 marks)
Because the force did increase up until reaching 400 grams of aggregate, however after 400 grams of aggregate used the force decreased with the mass of 500, 600, 700.
Atmosphere
Explain why there are many theories involving how simple life were formed? (1 mark)
Because there's no conclusive evidence supporting one theory.
6 marker on the atmosphere
-Volcanic activity released carbon dioxide and also water vapour in the air, increasing levels of both in the early atmosphere.
-Earth cooled, decreasing levels of water vapour, and forming oceans.
-Carbon dioxide dissolves in the oceans, decreasing levels of carbon dioxide.
-Plant life do photosynthesis decreasing levels of carbon dioxide in the air and also increase levels of oxygen.
Metals and their uses
Why do we need to do stage 1 which is separation ? (2 marks)
Because separation of the ore, means that the ore would now be more concentrated of that metal and therefore allowing it to be more economical.
Why is cast iron not used for over head cables? (1 mark)
Too soft.
How is cast iron formed? (2 marks)
4% carbon in the cast iron reacts with oxygen at high temperatures, forming carbon dioxide.
Property of Aluminium (1 mark)
Low density
Transition metals and how can you tell copper is a transitional metal and not Aluminium. (3 marks?)
Aluminium is in group 3, and group 3 metals are not transitional metals. Copper is in the middle section of the periodic table where transitional metals are located.
Crude oil
Fractioning columns ( 4 marks)
Crude oil has a mixture of hydrocarbons.
Crude oil is vaporised.
Crude oil is condensed.
At different boiling points and collected.
Why is limestone suspension used and which environmental factor does it decrease? (3 marks)
Sulphur dioxide forming sulphuric acid reacting with the limestone, decreasing levels of sulphur dioxide in the air, DECREASING THE AMOUNT OF ACID RAIN
Finish cracking (1 mark)
C2H4
Polymerisation drawing (3 marks)
Removal of double bond.
Adding a bond on the brackets. -()-
Smart polymer property (1 mark)
MALLEBALE, STRONG, LIGHT (YOU ONLY NEED ONE)
Vegetable oils
Weird question poorly worded, since it was in reference for food and fuel.
Why are vegetable oils important? (1 mark)
Conservation of non renewable sources?
2 main stages (2 marks)
-Crushed
-Oil removed by pressing
One use of vegetable oil over than using water for cooking? (2 marks)
Vegetable oil has a higher boiling point than water, this means that the food will be cooked at high temperatures so making it quicker.
Emulsifier (4 marks)
-Hydrophilic head is attached to the water.
-Hydrophobic tail is attached to the oil.
-Stops separation of both liquids.
I've done a few corrections.
Hey, That's wrong, I get you, I had to have a good look at the periodic table to see that it involves the electrons. Atomic number=proton=electron. On the periodic table Sulphur is - 16 and Oxygen is - 8, Oxygen's MASS NUMBER is 16 x
Original post by Burning
Yeah that's what I put, if I remember correctly it was 2,8,6 which is 16 = oxygen
predicted grade boundaries?
Original post by tibz101
For the 'why is thrre no overall charge?' question, I put that protons have a +1 charge and neutrons have no charge but electrons have a -1 charge so these cancel eachother out?
Posted from TSR Mobile
Posted from TSR Mobile
yeah thats fine, cos in past papers it says allow "they cancel out" i also put that
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