GCSE OCR 21st Century Triple Science (CBP1-7) Thread

I did that. I never knew you had to put 2x H+ ions

is that right because i though it was the oxygen being remove from the aluminium oxygen

Was that right?

I don't think you did to be honest. I think people got the wrong idea of 'you may use it once, more than once or not at all'. It said list the ions present, not how many of each ion present

Exactly! I thought that applied to the different compounds.

Was that not for the fact that you use H+ in both hydrochloric acid and sulphuric acid?

I don't think you did to be honest. I think people got the wrong idea of 'you may use it once, more than once or not at all'. It said list the ions present, not how many of each ion present

I don't think you did to be honest. I think people got the wrong idea of 'you may use it once, more than once or not at all'. It said list the ions present, not how many of each ion present

Unsure if it's right, but that's what I put (also said that in C123 too).



Exactly! I thought that applied to the different compounds.

I put reduction is gaining electrons. Is this wrong?

Reduction would be the loss of oxygen in a compound.

So i got it wrong???

Yeah, it was two marks, I'm sure you didnt need two of the H+ to get the marks, besides one is fine because they simply asked for what was in it; it is fine if you put two though.. they cant mark you down I think the penultimate question was really weirdly worded!

Well that is true, I think you would still get a mark for placing just one Hydrogen ion. But the ions present in H2S04 are two hydrogen ions and one sulfate ions, it links in with how many of each is present?

The uestion on the charges of Ion and Chlorine, Was it Fe3+ and Cl-?

The uestion on the charges of Ion and Chlorine, Was it Fe3+ and Cl-?

Reduction would be the loss of oxygen in a compound.

is that right ????