OCR Gateway Chemistry C4C5C6 - 13/06/13

For the C6 six marker did we literally just have to say "hydration has __ which is better than fermentation's ___ so hydration would be better" etc throughout, then make a decision at the end? It seemed far too easy for six marks Also I think I found it okay, a little harder than Bio though. I got 0.08 for conc, too. What did everyone get for the alternative to CFCs formula?

I did the one which contained Hydrogen and no Chlorine (second one down I think)

I thought this chemistry exam was slightly more difficult than biology as well

I thought it was much easier, hoping for full UMS even

Oh wow, my calculator gave the answers in standard form (WHY?!) so I got 0.125 mol/dm^3 for the concentration of NaOH.

Oh and section D was horrible. The rest of the questions were nice though.

i think you will still get the marks,,even if it is in standard form ...
and i thought SectionD was easier than it was in Bio...it was only 2 mark questions this time

What did people put for why it is difficult to predict levels of CFCs? I couldn't think so I put, some governments might change their mind and disagree with what scientists say about CFCs causing damage to the ozone and start using them again (LOL) and that we might find a way to decrease levels of CFCs in the atmosphere....are these answers suitable? :L

Probably

I had no idea... I said "people might use them" "might have unknown reactions in stratosphere "

I wrote about how they're still being released by fridges and air conditioning machines.

For the concentration 1 I put 0.08 but did it already give you mol\dm3 or did you have to put it? Also it Wasent there would you get taken away a mark?:/