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What did you write for Edexcel C2 GCSE's last 6 marker?

I'm curious whether or not I'd get marks for describing an experiment where a gas syringe is used to add oxygen tics piece of magnesium ribbon held in a test tube instead of the crucible method everyone said they put...


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itsdatboy
Original post by harry_16
I'm curious whether or not I'd get marks for describing an experiment where a gas syringe is used to add oxygen tics piece of magnesium ribbon held in a test tube instead of the crucible method everyone said they put...


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Okay, you were supposed to work out the empirical formula. It even gave the answers to you. But for some stupid reason I worked it out with 2 oxygen as it's O(small 2) as the molecule is diatomic. However, the equation was Mg+O=Mg0, so you didn't need the small 2. I'm guessing I'll still pick up a few marks though for working it out. This eventually gives you the answer of 1:1. However, you were also supposed to put that you could react magnesium with hydrochloric acid and measure the gas using a gas syringe. I also put that you could weigh the magnesium with scales as it did ask you to how the values could of been found.

I have no idea to what the crucible method is but your method seemed legit and you'll probably gain about 3-4 marks (as you didn't work the empirical formula).
Reply 2
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harry_16
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2
Sorry, I forgot to mention that I did the empirical formula part (I was mainly worried about the marks for the experiment). I made the exact same mistake as you did! I ended up with Mg2O because of it but as long as you show that you understand the method for working it out you should get most if the marks.


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