The question was basically asking how could you get the most out of your 'ingredients'. That's why for the second part to that question the answer was filter it to remove solids... I think :dontknow:

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Reply 28

rm715

Original post by laurendean

I wrote that you would do a test for acid, i.e. litmus paper turns blue

Oh okay cool because I wrote phenolphthalein but I definitely spelled it wrong and scared I put the results the wrong way round!

Reply 29

AYR

How would a test determine whether all of the acid was used?

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Reply 30

AYR

Original post by rm715

Oh okay cool because I wrote phenolphthalein but I definitely spelled it wrong and scared I put the results the wrong way round!

How would a test show it was all used?

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Reply 31

om18999

Original post by rm715

Oh okay cool because I wrote phenolphthalein but I definitely spelled it wrong and scared I put the results the wrong way round!

and then for the second part of that q I wrote to do a test for chlorine ions i.e. silver nitrate -> white precipitate??? I had no idea haha it took me ages to think...what did you put?

Reply 32

om18999

For the question about the polar/sun bears and what the correlation was between their mass and their climate, what did people say??
I put that the polar bear had a higher mass because of the fat/blubber needed to insulate itself in the cold climate but I don't think that's right.

Reply 33

tillsburno

What did people put for the physical property that shows water is pure? I said it boils at 100 degrees C but pretty sure that's not the correct answer...

Reply 34

Brooke.taylor

Original post by AYR

How would a test determine whether all of the acid was used?

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i said use universal indicator to show a neutral solution. Acid + metal = salt + water + hydrogen so you can assume the reaction is complete when the solution is neutral??

Reply 35

Neal.Caffery

Original post by DrSebWilkes

In regards to this question: "Name the process of adding zinc to steel"
... or something like that ... what was the answer? :O

I put "Galvanisation"

Oh hi seb O.o fancy seeing you on here.

Reply 36

om18999

Any suggestions for paper 2 topics????
I'm feeling loads of titration and anion/cation analysis tests?

Reply 37

om18999

Original post by tillsburno

What did people put for the physical property that shows water is pure? I said it boils at 100 degrees C but pretty sure that's not the correct answer...

I put that too, but only as a last resort as it said a physical property...
i remember getting this question before on a past paper and getting it wrong but I couldn't remember the correct answer in the exam!!

Reply 38

NP2803

Original post by JamieTheb

It was a nice paper but everyones stating grade boundaries are going to be in the high 70's for a*'s??!! Surely thats slightly high?

The last only grade boundaries on paper 1 have been 69, 70 and 71 so it is very unlikely that the grade boundaries will be high 70s. I reckon it will be somewhere around 70 marks for an A*.