Variable oxidation states copper chemistry

[@thepeopleschamp2826]

Thankyou, was struggling with this topic but now watching this video has made me understand it more better!

[@XAssassin]

is this new spec or old spec? do we need to know copper chemistry for the new spec?

[@danielfryday6460]

Allery chemistry do you need to know this for the new ocr spec as it does not say in there ?

[@omaralias1201]

Hi , is this for AQA? i know that you need to know variable oxidation states for cobalt and chromium

[@AlleryChemistry]

+Omar Alias Yup you're right. Copper chem is not needed for AQA. Just the reactions to do with Cu ions in aqueous solutions. (Topic 16).

[@sumonbasak6095]

Allery, is there any negative oxidation of copper? I read this somewhere but I no longer remember the example of that compound having a negative oxidation state, not the resource also. It's not available on the internet also. Would you help me with this matter?

[@motayee97]

For the Disproportionation at 4:05 does the 2 infront of Cu+ not times by +1 to make +2 and therefore no oxidation just reduction, or do we ignore the 2, Also does this mean I don't need to know this video for AQA syllabus? Thankyou so much for your videos!

[@AlleryChemistry]

+Mo Tayee Yup, ignore the 2 that is for molar ratios only. Copper Chemistry in this vid is not required for AQA although basic complexes are.

[@amidiqbal7129]

Wat parts do u need for aqa

[@asif7240]

Thank you

[@MrTonsun]

but isnt Cu2O a red solid????

[@AlleryChemistry]

MrTonsun Yes however I was referring to Cu+ ions in solution to which compounds formed from solution are white e.g. CuCl. Cu2O is insoluble in water and will oxidise to Cu2+ over time anyway. Hope this helps!

[@MrTonsun]

A Level Chemistry Revision Videos thx for the reply! I have another question :P Does the Cr3+ aqua ion redissolve in excess NH3? on some revision notes said it does and some said it doesnt :/ lovin your vids and keep it up!

[@AlleryChemistry]

MrTonsun Yes it will redissolve to form a purple hexaammonia complex. I did a summary vid on transition metal complex ions that may be of interest to you just click the link. kzbin.info/www/bejne/d4mae5-VhKasnKM

[@sonilzaki]

cheers:)

[@AlleryChemistry]

Sonil Zaki No problem!

[@ayeshashaikh4433]

wow! everything just sorta clicked