Ma’am you have been instrumental in getting the grades I want in A2 chemistry. You’re a god sent to us students and I thank you for this work you do. I hope you continue to guide students for years to come!
here are the colours of the complexes Cu2+ : blue Cu2+ + ammonia or NaOH: blue precipitate Ci2+ = excess ammonia: precipitate dissolves giving dark blue solution Cu2+ +Cl: yellow Ni2+: green Ni2+ + ammonia: grey-green precipitate Ni2+ + excess ammonia: blue solution Ni2+ + Cl: yellow solution Co2+: pink Co2+ + NaOH/NH3: blue precipitate Co2+ + excess ammonia: yellow brown solution Co2+ + conc. HCl: blue solution Zn2+ + NaOH/NH3: white precipitate soluble in excess to give colourless solution V2+: purple V3+: green VO^2+: blue V5^+: yellow V2+ oxidised to V3+ when left standing in air Cr3+: green Cr3+ + NaOH: green precipitate soluble in excess Cr3+ + NH3: grey-green precipitate insoluble in excess Cr3+ is oxidised to CrO4^2- to turn from green to yellow CrO4^2- froms Cr2O7^2- to turn from yellow to orange when acid is added to it Cr2O7^2- + AgNO3(silver nitrate) gives a red precipitate Ti3+: purple Mn2+ + NaOH: Off-White solution which turns darker when left standing in air Fe2+: green Fe3+: brown
@@user-vp3ly3xl5b Chat chat chat ALL OF THEM. 2 MORE DAYS BABY. GONNA START TODAY. TMRO NIGHT I SHOULD BE DONE WITH EVERYTHING. WHY? CUS I SAID SO. WE DONT FALL LADS. ALMOST DONE. FINISH LINE IS RIGHT UP THERE BABY
Ma’am you have been instrumental in getting the grades I want in A2 chemistry. You’re a god sent to us students and I thank you for this work you do. I hope you continue to guide students for years to come!
Do not commit shirk pls
here are the colours of the complexes
Cu2+ : blue
Cu2+ + ammonia or NaOH: blue precipitate
Ci2+ = excess ammonia: precipitate dissolves giving dark blue solution
Cu2+ +Cl: yellow
Ni2+: green
Ni2+ + ammonia: grey-green precipitate
Ni2+ + excess ammonia: blue solution
Ni2+ + Cl: yellow solution
Co2+: pink
Co2+ + NaOH/NH3: blue precipitate
Co2+ + excess ammonia: yellow brown solution
Co2+ + conc. HCl: blue solution
Zn2+ + NaOH/NH3: white precipitate soluble in excess to give colourless solution
V2+: purple
V3+: green
VO^2+: blue
V5^+: yellow
V2+ oxidised to V3+ when left standing in air
Cr3+: green
Cr3+ + NaOH: green precipitate soluble in excess
Cr3+ + NH3: grey-green precipitate insoluble in excess
Cr3+ is oxidised to CrO4^2- to turn from green to yellow
CrO4^2- froms Cr2O7^2- to turn from yellow to orange when acid is added to it
Cr2O7^2- + AgNO3(silver nitrate) gives a red precipitate
Ti3+: purple
Mn2+ + NaOH: Off-White solution which turns darker when left standing in air
Fe2+: green
Fe3+: brown
tyy and gl on your exams
ur a 🐐
Could you please make a review for u 5 too
Thank u so much for ur hard work! This is really helpful exam is in 2 hours and 22 min
Thank you so much ❤️
Tysm for this video. Words cannot explain how grateful I am❤
Holy shit it’s ial edexcel itself 😨 grade my papers properly nigga 🔫
gra
Thabkyou so so much for this
Thanks miss
Assalamualaikum ma’am. Hope you are doing well.
Will you please be able to upload a Unit-5 review video before the exams?
Can u please make a review for unit 5
She has videos for u5 in a playlist on her channel
A2 chemistry edexcel
Thats the name of the playlist
Pls put time stamp on your video it would be very jelpful thank you
Abay chup kar na
Chat is this video enough to prepare for the unit 6 paper (i will do past papers too after this but yeah)
Chat Chat. Chat says yes. This is enough my guy. But grind past papers.
@@dude_mude3366thank u dude mude 33699
Chat chat hows revision going?
chat chat how many papers you guys doing?
@@user-vp3ly3xl5b Chat chat chat ALL OF THEM. 2 MORE DAYS BABY. GONNA START TODAY. TMRO NIGHT I SHOULD BE DONE WITH EVERYTHING. WHY? CUS I SAID SO. WE DONT FALL LADS. ALMOST DONE. FINISH LINE IS RIGHT UP THERE BABY
🐐🐐🐐🐐
some of the comments here are so random and hilarious 🤣🤣
studying this now cuz too lazy to do past paper
Lol 2 hours to go me too!!!