Even if they do lower grade boundaries I still don't think I would've managed anything higher than a C, that exam was awful and my mind went totally blank and messed up on loads of questions, especially the synthesis questions, the 9 marker and the pH ones
anyone put reversible sign for the very first question?
I didn't for both first and second. They'll allow either way, as the question referred to a reaction between but it was technically reversible (as is every chemical reaction depending on the conditions).
I didn't for both first and second. They'll allow either way, as the question referred to a reaction between but it was technically reversible (as is every chemical reaction depending on the conditions).
yeah i only put a reversible sign for the first equation and not the second
The boiling point isn't different enough for the alcohol to actually boil off at a different fraction without huge contamination - what they wanted is 'chromatography' I think.
The boiling point isn't different enough for the alcohol to actually boil off at a different fraction without huge contamination - what they wanted is 'chromatography' I think.
The boiling point isn't different enough for the alcohol to actually boil off at a different fraction without huge contamination - what they wanted is 'chromatography' I think.
They're normally both accepted on mark schemes. The industrial process of fermentation and spirit production relies on distillation of alcohol from water so it's definitely possible!
They're normally both accepted on mark schemes. The industrial process of fermentation and spirit production relies on distillation of alcohol from water so it's definitely possible!
Exactly this.
I originally put chromatography to be on the safe side and then completely changed it.
I was stuck between (fractional) distillation, chromatography and reflux - why did I go mad and put reflux!?