That paper made me cry. Have no idea if I did well but I feel my chances of uni are blown Hahahaha asif I thought I'd aim for A* at the beginning of A2
That paper made me cry. Have no idea if I did well but I feel my chances of uni are blown Hahahaha asif I thought I'd aim for A* at the beginning of A2
same. but i have already prepared my tears for this paper before it starts.....
That question on oxidising and reducing agent was 6 marks and I def got that reducing equation wrong because I said it would react with 3 - 6 redox systems instead of just one. How many marks do people think thats worth?
What was the ph of buffer solution and how did you calculate it?
3.43 I think, and you just worked out the moles used, then divide each by 1000. No need to deal with reacting masses because conjugate base was given. Plug into Kaacidoversalt, then -log c:
I went for the ol' CuCO3, which is also insoluble but I think it would get the mark no? You want to end up with the Cu(HCOO-), because the carbonate and the acid would definitley react, even if it was solid before
That's true, and overall it may well still work, and so might Cu(OH)2, it's just a dodgey bet considering it technically wanted the Cu2+ ions to be the thing reacting.
3.43 I think, and you just worked out the moles used, then divide each by 1000. No need to deal with reacting masses because conjugate base was given. Plug into Kaacidoversalt, then -log c:
That question on oxidising and reducing agent was 6 marks and I def got that reducing equation wrong because I said it would react with 3 - 6 redox systems instead of just one. How many marks do people think thats worth?
I reckon 2 marks for explaining what is meant by oxidising/reducing agents. Then another 2 marks for how Cr3+ it acts as a oxidising agent and then another 2 marks for it as a reducing so you probably lost 2 marks max