AQA GCSE Chemistry - C2 and C3 15th May

Any predictions for the grade boundaries for C2? For A* and 100UMS?

A* in the Chemistry Unit 2 paper will probably be around 45 - 47.

What about 100UMS?

There was no advantage to it, the disadvantage was: distillation requires a lot of energy hence money

It was just generally that distillation is expensive- I suppose that you would both go into how the process how the process has many steps and also that large amounts of water would need to be distilled- using a lot of energy.

No idea, sorry.
Probably around 54?

That seems reasonable, thank's for your reply

If you're worried about UMS, check out AQA's UMS converter on their website

anyone have an unofficial markscheme they wanna post? im so worried I got loads wrong. don't rly wanna b surprised on results day with the crap mark

Don't panic, C3 was really difficult!

I found C2 fine, a few silly mistakes, but the C3 exam was terrible! When I read the first question about the water treatment process at first a massive grin formed on my face - then I realised it said, "state the TWO main parts to the water treatment", that definitely threw me off.

I also had no hope with the titration calculation, I had practiced so many and the one that we were given just seemed so much harder!

And as for the energy change calculation...I knew the answer had to be a minus number, but for some reason I couldn't get my answer that way even though it said that the reaction was exothermic...

Urgh, just someone kill me now, I don't think I will be able to look on results day...

I have the same problem, but I messed up chemistry instead. :/ Like, I overcomplicated the questions so much...it annoyed me because I know for a fact I can get A*s, I just messed up on the day.

Maybe you'll get enough method marks for an A*. Even if you don't get it "right" but still put relevant info (like on the higher) markers, they'll probably award marks. We'll just have to see on the day. Also, we have core to go yet! (well, I do.) you could well average an A*, especially if you have a good ISA grade.

For the dot and cross diagram, I did all crosses.... But I don't think it specified what to use, will I still get full marks ?

I would do that however I believe that the UMS will greatly differ this year from last year, so that's why I would like to know what all you guys think the grade boundaries will be like!

HELP
how would you answer this question
Why does increasing he voltage increase resistance
Do you say that there is a greater number of collisions between electrons and that the current will be greater so higher resistance do you mention temp increase someone give me a bullet point like 3/4 mark answer for this I'm confused

BTW guys what was the answer to the question that asked for evidence that a large amount of energy had to be used in that reaction?

My god, I really badly worded my answer for this I was going to go back and reword it after but I forgot. I basically put 'It could get in the water when it's next used which is dangerous' but my wording was off because I was still thinking about the last question when answering It, I don't know the answer, but that sounds sensible, I would't want to clean my kettle with a deadly acid if I planned on using it to make tea later on

It showed the symbol equation for the reaction and Oxygen turned from a compound with Mg to a gas by itself (i think!)

Reckon there's any chance they would allow one mark for saying hydrogen forms at the negative electrode if enough people have said it ?

pencil as it doesn't dissolve in the solvent unlike pen 😃 x