Unofficial Mark Scheme
AQA Chemistry Paper 1
Message me to contribute, answers are not all my own and may not be correct feel free to correct any errors or add questions/answers
1) Things that can be reacted to create salts
Sodium Hydroxide?
Metal?
2) Method for creating salts from dry copper sulfate
3) Hydrogen Fuel Cell
2H2 + O2 -> 2H2O
Graphite conducts electricity bc each carbon atom only bonds with 3 other carbon atoms (carbon usually makes 4 bonds) so graphite has delocalised electrons to carry the charge
The apparatus was incorrect because the student needed to use measuring cylinders or gas syringe rather than boiling tubes in order to see the volume of gas
X) Limiting Reagent
Calculate the moles of each the titanium compound had less moles than the other substance and so would run out first,making it the limiting reactant
X) Titration
0.046 mol/dm^3
X) Percentage yield
12.145 Kg
X) Bond energy
I got 188 but answer is 290
X) FeS2
X) Multiple choice Question
B,C,A
X) How did Chadwick contribute to understanding of isotopes?
Chadwick discovered the neutron and isotopes have the same number of protons and different number of neutrons
X) Last question
0.126g