OFFICIAL: GCSE AQA Chemistry - C1- Higher- 19th May 2016 - AM

I put "the higher position of an element in the reactivity series, the faster it will react" will i get 1 mark
also i put the potassium didnt go cloudy "temperature wasnt high engough so the potassium didnt decompose to form co2 and thus the limewater didnt go cloudy" (atleast 2 out of 3 marks?

Did you all get the percentage (working out 1 gram of fuel used) question? Literally spent 10 mins on it lol

So easy

Water boils at a higher temp than Ethanol.
Ethanol evaporates and condenses in the condensor column.
After condensing the drop/drippings/droplets fall into a separate beaker to form pure ethanol.

(this is a shorter and concise answer than I wrote)

EDIT: Fractional distillation will most likely get you no marks. This is not the same process as normal distillation.

Left that whole page and went back to it at the end with 15 mins spare. At first glance I had no idea how to figure out the calculation and didn;t want to waste time. This is an equation/formula we weren't even given a sniff off so I don't think many people knew it straight away - albeit was straightforward maths.

You are wrong. AQA usually accept simple distillation but Fractional Distillation is the exact process for separating 2 liquids with similar boiling points.

Yeah it wasn't mentioned at all in the specification as far as I am aware. Perhaps they expect it to be common sense..?

the one where 20.3 was the answer?

the one where 20.3 was the answer?

the one where 20.3 was the answer?

Indeed. Simple calculation, got it correct as well. Just no mention (to my memory) in class on how to do so. Again, it was basic maths but it was a TEST question - more incline to how well you can read the question and figure out the maths involved. Truly a time wasting - time testing question. Can't remember how many marks it was worth though.

I just said that there was no mass deducted and there was no co2 being produced because the limewater didn't turn cloudy

i said that there was insufficient heating to thermally decompose the potassium carbonate so no carbon dioxide was releasd to make the limewater cloudy

do you think i will get a mark if i wrote bromine water goes transparent bc i thought it was specifically asking for the colour

do you think i will get a mark if i wrote bromine water goes transparent bc i thought it was specifically asking for the colour

For that question where it asks to give 2 reasons why hexane is the best fuel from Table 2, I wrote that it gives out the most energy which is correct according to the mark scheme but for the second point I wrote that the table shows it has the shortest hydrocarbon chains which means its the most flammable. Would that give me two marks?