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C3 edexcel june 2016 unofficial mark scheme

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Reply 60

FenixZ

Calculations were 2.4 and 12.5 or something like that :P

Reply 61

niichola.

You know for that ethyl ethanoate question with the drawings of the others and blank space in between. I'm pretty sure it said to write down the formula not to draw it

Reply 62

FenixZ

Original post by niichola.

You know for that ethyl ethanoate question with the drawings of the others and blank space in between. I'm pretty sure it said to write down the formula not to draw it

yeah it did say formula, but using that I think it meant the drawing. They would never have a written answer surrounded by drawing it defies chemistry. You don't inter join text and symbol equations?

Reply 63

amanii_ox

Original post by Nightcore Lore

I put
Pb- - e -> Pb2
would that get a mark

That's two marks down the drain. Gr8.

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Reply 64

amanii_ox

Original post by B1uescorpion

I put NH4+ and ammonium too but think the answer was OH- since that's what makes it alkali. Not sure though.

I did for the first part name the ion:
Ammonium hydroxide

Second part was name the formula:
(Picture) because.. NH4 is + and OH is -

Someone correct me if I'm wrong

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Reply 65

amanii_ox

Original post by amanii_ox

That's two marks down the drain. Gr8.

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For me btw, not u :/

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Reply 66

Bilal1010

Hey can someone please help me out here? I wanted to ask, if I did not do as well as I expected on one of the further science papers but I got an A* in the coursework, would my coursework make up for that one bad grade? E.g a C/B

Reply 67

astronomer99

Original post by Bilal1010

coursework is equivalent to one exam because of the way UMS are counted. An A* in coursework is 72 UMS and so is an A* in an exam. You need overall 288 UMS for an A*

Reply 68

ismaeel_akram

Original post by itsdatboy

I went through it with my teacher and I got about 45/60 which is a definite B, so happy :biggrin:

That's an A, last year it was 41 to get an A and 46 for an A*

(edited 7 years ago)

Reply 69

itsdatboy

Original post by amanii_ox

I did for the first part name the ion:
Ammonium hydroxide

Second part was name the formula:
(Picture) because.. NH4 is + and OH is -

Someone correct me if I'm wrong

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It was hydroxide only. It depends on the examiner you get. However, you'll most likely not get any marks as ammonium hydroxide is a totally different thing. Sorry :/

Reply 70

Bilal1010

Original post by astronomer99

coursework is equivalent to one exam because of the way UMS are counted. An A* in coursework is 72 UMS and so is an A* in an exam. You need overall 288 UMS for an A*

Okay thank you

Reply 71

TheMasterG

If I got 55/60 in B1, 47/60 in B2 and 50/60 in B3, with an A* on my controlled assessment (45/60) what grade would I be looking at for biology?

Reply 72

Liv123456789

On the last 6 marker, I explained 3 substances (the alkenes, alkanes and ethanol can acid) however I didn't have time to identify the alcohol. How many marks do you think I may lose? For the alkenes, I said about the bromine test, how double bonds can join up to other monomers during polymerisation, and that it was a hydrocarbon, for that alkane, I mentioned the bromine water test and it was a hydrocarbon, and for ethanoic acid I said it contained oxygen and when I reacts with magnesium it fizzes indicating hydrogen gas is produced and when it reacts with sodium carbonate it fizzes due to carbon dioxide gas being produced. However I didn't have time to say about alcohol, so now I'm worried. How many marks do you think I can get?

(edited 7 years ago)

Reply 73

qutae

Original post by Liv123456789

(It's the alcohol which can react with oxygen in the air to PRODUCE ethanoic acid btw)

I think 2 or 3 marks are given for identifying the correct substances and the other half are for giving valid reasons. Hmm..

maybe, I think you got 4 marks? ;;;
don't worry about it too much! :h:

Reply 74

qutae

Original post by FenixZ

yeah it did say formula, but using that I think it meant the drawing. They would never have a written answer surrounded by drawing it defies chemistry. You don't inter join text and symbol equations?