A level paper 1 mistakes Flashcards
1
Q
Iron ions form a pale green solution, but zinc ions form a colourless solution.
Explain why zinc ions are colourless.
A
Zinc ions have a full 3d sub-shell
So electrons cannot move between 3d orbitals
2
Q
Why is the value for enthalpy of neutralisation less for ethanoic acid than HCl or nitric acid?
A
Some energy is required to break O-H bonds to release H+ ions so the value is less
3
Q
What is a reason why a solid is not included in a Kp expression?
A
The partial pressure of the solid is constant
