AQA 2.5 Transition Metals REVISION

[racheldoran]

Timestamps (for revising sub-topics):

GENERAL PROPERTIES OF TRANSITION METALS (2.5.1)
2:50 = intro to d-block elements
3:34 = electron configuration of d block + defining transition elements
14:15 = general properties of transition elements
19:10 = introduction to complex ions
**
LIGAND SUBSTITUTION REACTIONS (2.5.2)
21:18 = types of ligands
1:00:57 = ligand substitution reactions: small, neutral ligands (NH3)
1:03:12 = ligand substitution reactions: larger, charged ligands (Cl-)
1:04:44 = relative strength of ligands + the chelate effect
31:48 = haemoglobin
**
SHAPES OF COMPLEX IONS (2.5.3)
23:17 = shapes of complex ions
39:23 = stereoisomerism in complex ions
**
COLOURED IONS (2.5.4)
43:41 = d-orbital splitting
47:00 = ∆E=hν
48:14 = relating frequency absorbed to colour
51:30 = factors affecting ΔE and colour
54:04 = colourimetry
16:52 = colours of different oxidation states (to learn)
**
VARIABLE OXIDATION STATES (2.5.5)
29:30 = calculating oxidation states of metals in complex ions
1:10:48 = vanadium chemistry: oxidation states
1:12:19 = vanadium chemistry: REDOX reactions
1:14:40 = redox potentials
1:19:39 = Tollens’ reagent
1:21:47 = redox titrations
1:26:00 = example of redox titration with Fe2+ ions and KMnO4
**
CATALYSTS (2.5.6)
1:29:18 = types of catalyst (homogeneous/heterogeneous)
1:31:12 = heterogeneous catalysis - e.g. the contact process
1:34:38 = catalyst poisoning
1:37:09 = homogeneous catalysis - energy profiles (+ example)
1:41:53 = autocatalysis

[losasakarosa]

I can't believe these are free, thank you so much!

[kenziefisher]

This video saved me I can't lie. This topic is one of the hardest, personally, and this video makes it so simple. Thank you so much.

[katheriner]

HOW MANY OF YOU HAVE REALISED THAT YOU ARE LATE AFTER KNOWING THE AMOUNT OF CONTENT YOU HAVE TO MEMORISE? 😭

[crylexion]

How do you finish a 2 hour video in 20 minutes?

[NeoUno]

This video is so great, I appreciate the references to organic chemistry, it really helps connect the related concepts!

[samiultr]

Amazing video but quick error, your ethane dioate has a double C=C bond where it should be a single C-C bond

[georgiapactor]

Thank you SO much for these videos. I honestly do not know what I would do without them. I am self-teaching whilst working full-time so these videos really are saving me! Thank you again.

[wtina]

This video is fantastic! i have recommended it to my friends !!! Perfectly match with our AQA syllabus

[juliaraliang]

1 day before exam, finally finish this shxt. this video saves my life

[rosefagan]

Thank you so so much! This makes sense to me! Having not being in education for over 8 years this is so helpful and getting me back in to the swing of it

[arnoacorhe]

Honestly this has helped me so much, was picnicking about how to revise properly and gather info for my revision, and your videos are the perfect tool for this, thank you so much for all of your videos, they really helped me out! 😁

[himikotoga]

POV: The night before the real exam be like:

[rosalina]

33:00 Those 4 Nitrogens come from a tetradentate ligand called porphyrin. If you say "haem" - that's the whole complex, not the ligand.

As usual, your videos are super-useful! Perfect for a final cram for a topic test :)

[lorettakurtz]

Thankyou so much sir. Your videos are concise and very informative and the fact that you are actually enthused about the subjects (Contact process and autocatalysis...😀) makes them so much more interesting to watch!

[jpc_]

Its three days before paper 1 am i cooked?

[xxxshivanixxx]

at 22:51 I think for ethanedioate there isnt supposed to be a double bond between the carbons ? Checking from the aqa textbook :)

[phillipschristian]

At 1:22:50 you say that we're looking for the concentration of the reducing agent Fe2+, but then in the blue box you say we're looking for the concentration of the MnO4-? So which concentration are we looking for and were do we put that solution, and which one of the two is the reducing agent? (edit: think you just meant to switch around the MnO4- in the blue box and the Fe2+ so that it says "we look at finding the conc. of Fe2+ by titrating against an oxidising agent like MnO4-" ?)

[mrspedrix]

Do you need to know all the colours eith thr metals

[phillipschristian]

Also, how do you know at 1:27:00 that Fe2+ is going to be the reducing agent and how do we know that Fe3+ is the ion of the Fe element that is going to form? Is that just something you have to learn or is that a part of just looking at the reaction and seeing what it's reacting with?