AQA GCSE Chemistry Paper 2 Unofficial Markscheme (Higher) - Triple - 12/06/19

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I think so that’s what I put

Just to make sure, was I right in saying that Lithium ions give a Crimson flame, and Carbonate ions produce CO2 when react with an acid, which turns limewater cloudy?

Reply 381

Lucy1313

Original post by aeneas_son

well i think aqa need to make their wording clearer, we cant afford to make assumptions and risk throwing away marks. 'unreacted', literally means just that, so people would be right in thinking that they mean the amount of O2 that is in excess. conversely, they gave very limited information. my brain is a bit fried at the moment so i cant figure out the question properly, but im sure theres some way to include the H2O

Right so I included the H20 by working out the Ar so of all the products and all the reactants and the volume of each and there was a difference so I assumed that was the amount I reacted to form products

Reply 382

Safzal0332

Original post by Morg3015

it was 2CH4 +302 > 2CO + 4H2O i think

agree

Reply 383

Shapik

FINALLY SOMEONE i thought i was the only one with 300

Original post by rudikonrath

Spoiler

Reply 384

Ninjas-0808

Noooo I put 0.09 I didn’t see it was to 2 sig figs

Reply 385

Billy855

What did people put for the balancing equation question.

Reply 386

Nyah17

what do you reckon the boundary for a 9 will be on this paper?

Reply 387

aeneas_son

people are (sadly lol) feeling quite confident about this paper- i reckon about 160 for a 9? 165 at most.

Original post by Nyah17

what do you reckon the boundary for a 9 will be on this paper?

Reply 388

Morg3015

Original post by Billy855

What did people put for the balancing equation question.

2 3 4 2

Reply 389

emredman

yeh I did that too, the free science lessons guy did it in one of his videos lol

Original post by ellie1elephant

I put that changing the pressure would not make a difference because the number of moles on each side of the equation is the same so equilibrium would not shift. Did anyone get the same?

Reply 390

darsh_jaicante

Oof, I got 300cm^3, I'm sure I did something wrong maybe.
I did something and then got to 8.7-8.4= giving me 0.3dm^3 and then got 300cm^3

Original post by thefaketommy123

Post answers here. Thought ir was so easy. I got 3650cm3 FOR unreacted volume question

Reply 391

EvilBunny6101

Ahhaa i got that and I told myself times by 1000 Andy I even did the conversion and I forgot to times. My life sucks

Original post by MAXW303

3.60*5/3 =6
7.25-6=1.25dm^3
=1250cm^3

(edited 4 years ago)

Reply 392

Issarenn

I said it wasn't energy efficient would that be okay lmao

Original post by mannylozano123

One reason high pressure wasn’t used can be for safety , higher than 200 atmospheres is dangerous both are correct!

Reply 393

chloroplast44

I got 5 % and I did desired product mr / total reactant mr x100

Original post by Kerrisbailey

Yup

Reply 394

DynamoAlchemyst

Have to invest in a more expensive reaction vessel

Reply 395

Gone245

Which material was the matrix and the reinforcement in the polyester question

I’m sure I said that the glass was the reinforcement

Reply 396

chloroplast44

What did everyone get for the how many times larger as I think I read the graph Wong and got 1.7 x. Did anyone else get that and how many Marks’s was that question worth 2 or 3? Thanks

Reply 397

Issarenn

For the first question I put 500 do you think they'd have a range ?

Reply 398

wacka100

Same man, I scribbled I out and put compound cus I’m a stupid c**t

Original post by ShyB

Anyone get the answer formulation for the tablet one?

Original post by Hudds999

****! I scribbled it out and put impure substance. *******s!

Reply 399

chloroplast44

Did anyone get 5% for the atom economy question or what did everyone get? I did desires product over total reactant mr and for 5% but some are saying 17% ?