AQA GCSE Chemistry C2/C3 May 15th 2014

Maybe, I did it as part of Further Additional Science, so possibly different papers.

If not, one mark wont hurt.

Those articles are about IGCSEs, not relevant for this exam as it's GCSE

Yep silver-enhances taste

Doesn't it prevent bacteria growth?


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In the spec it does say to improve water taste/quality however it is a suggest question so they'll likely accept both.

Hmm, as far as I'm concerned, it prevents the growth of bacteria and also kills them. Improving taste is subject to opinion, so probably not...

More reactive as u go down..bigger atom more shielding less force from nucleus and electron can b lost easier

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Can u remind me of the question

It was the barium silver something

The question where you had to say whether he was right or wrong?

I think it was both...because it said substance X turned blue - therefore he was wrong because blue = copper...

And then the second test, I didn't answer for because I didn't understand it, but all my friends who did said that the second test was correct...

Ohhh, AQA were nasty for C3

No, i understood that thank god haha the question before that asking how you would test the Barium silver.. Can't remember exactly what it said but i know what i put for the answer

I think that was the question asking how you would prove Barium Chloride contained Chloride Ions.

The answer being add dilute nitric acid and silver nitrate solution and if Chloride Ions are present a white precipitate is produced.

Yes that's the one thanks! Damn it i put cream instead of white

b2- a* 38 a 34 b 29
b3- a* 36 a 32 b 27
c2- a* 46 a 42 b 37
c3- a* 45 a 40 b 36

I think those are a bit too low

But isn't the rule that if the metal formed at the cathode is more reactive than, then hydrogen is formed? And zinc is more reactive than hydrogen so hydrogen would be formed?