The big giant AQA CHEM5 thread!!! (May/June 2013)

Has anybody got a table of all the metal ion colours that we need to learn? I want to set it as my desktop background so that I may have some chance of learning them all!

That's a really good idea! I'd love this too

Our teacher gave us one I will see if I can scan it for you guys some time next week

Posted from TSR Mobile

hey guys, quick question. we have been learning about born haber cycles and have just finished them in class. I was reading the spec and it said this: 'be able to construct Born–Haber cycles to calculate lattice enthalpies from experimental data. Be able to compare lattice enthalpies from Born–Haber cycles with those from calculations based on a perfect ionic model to provide evidence for covalent character in ionic compounds.' Any idea on what this means and how we do this? I have looked in the nelson thornes text book and i am sure i haven't heard of this in class. Please help

Thank you

Check my most recent post

Posted from TSR Mobile

Thank you very much

Have a look on page 174 of the Nelson thornes text book.

yeah my bad, thanks though

guys when talking about the enthalpy of solution, what does this mean: 'the separate ions are then solvated by the solvent molecules.'

sorry not the most reader friendly i am afraid, just too busy to step up the scanner, so i might have to properly scan it tomorrow for you

No problem!



In effect, the lattice is dissociated into ions which are surrounded by water molecules, forming solute-solvent attractions (solvation). However, the enthalpy of hydration relates to gaseous ions being "dissolved".



My god those notes are like a perfect summary! Did your teacher make them?!

yup pretty good huh. i love my chem teachers

yup pretty good huh. i love my chem teachers

You don't study at Solihull Sixth Form by any chance?

I am very jealous!