Aqa chem 4/ chem 5 june 2016 thread

Excuse how awful I am at PHYSICS, but I found rise over run and got 0.096 where am I going wrong? Like I dunno what to do from there? Paper is June 12 Q2a

As an example, use the y value at 700 and 460 to get 23.5-0/(700-460) = 0.0979
What AQA have done like the f**kers they are; they've made the line just under 24 so most people will mistake it for 24 when it's actually 23.5
Easy mistake to make, you'd have done it right otherwise, I did the same thing the first time I did that paper

As an example, use the y value at 700 and 460 to get 23.5-0/(700-460) = 0.0979
What AQA have done like the f**kers they are; they've made the line just under 24 so most people will mistake it for 24 when it's actually 23.5
Easy mistake to make, you'd have done it right otherwise, I did the same thing the first time I did that paper

What does this mean? The writing in the boxes?






Posted from TSR Mobile

When I did this paper, I did it on A5. This makes the graph harder to read but when you did this paper (I assume on A4) was it easy to see it as 23.5 instead of 24? I made that mistake.

It's barely noticeable, you can just about see that it doesn't touch the 24 so the best option is to presume that the line is halfway between 23 and 24; it's a horrid question

Is the general consensus that CHEM5 will be an OK-ish paper or do you reckon AQA will pull a horrible one out of the bag?


Posted from TSR Mobile

What does this mean? The writing in the boxes?





Posted from TSR Mobile

With maths, C3 was horrible but C4 was a standard paper but still difficult

I expect the same with CHEM5.

Ahhh - well CHEM5 is the more slightly easier as just need to remember stuff and not worry about applications as much however they may just destroy us once again.



Posted from TSR Mobile

The hardest part of CHEM5 in my opinion is the last question about titrations. Sometimes they're standard and nice, other times they're the devil's work.

Weirdly I actually like those titration questions! I always get what they're asking! It's the rest of the paper (especially the transition metals) that I struggle with haha

Do you understand June 13 8b (or c, whichever is the last question)?

I got the ratio however I thought Cl- ligands were bigger than NH3 ions so I don't understand why Z = Cu(NH3)6Cl3?

cobalt was first substituted using the ammonia to amke co(nh3)6(2+) and then the oxidising agent makes it (3+) and from there the cl- ions cant really displace those nh3 ligands so it's like a salt and the - charges attract to the +3 charge on the complex.

Idk it's weird and I don't really know why it happens but the wording of the question kind of lead me to it

I found 8c alright apart the formula, then I looked at 8b and I have no idea what the hell the chelate effect is

I found 8c alright apart the formula, then I looked at 8b and I have no idea what the hell the chelate effect is