Flame tests + colours (1 Viewer)

[Li0n]

do we have to know each colour that corresponds to each ion when put in a flame test?
eg calcium - reddish etc.

 

[:: ck ::]

sure do! =P

 

[Tommy_Lamp]

an easy way to remember some is....

BaG - Barium - Green
CuB - Copper - Blue
CaR - Calcium - Red
Think of rust when ur talking about Fe, rust is brownish, Fe3+ is brown, Fe2+ gradually turns brown

 

[abdo]

an easy way to remember some is....

BaG - Barium - Green
CuB - Copper - Blue
CaR - Calcium - Red
Think of rust when ur talking about Fe, rust is brownish, Fe3+ is brown, Fe2+ gradually turns brown

have you got more?

 

[jm1234567890]

i got all the needed ones in my summary

 

[Tommy_Lamp]

u only need to know a few:
– barium
– calcium
– lead
– copper
– iron

 

[abdo]

i know, but any more mnemonics?

 

[Tommy_Lamp]

i know, but any more mnemonics?

oh i know the obvious ones

OIL RIG - Oxidation Is Loss, Reduction Is Gain
An Ox and a Red Cat

 

[Tommy_Lamp]

maybe this will help

EDIT: xcuse the poor quality, conversion stuffup

 

[xiao1985]

maybe this will help

EDIT: xcuse the poor quality, conversion stuffup

uhm nice flowchart...

but when anion id part, keep in mind that PO4 (3-) is a conjugate base... and Phosphorus acid is a wk base... if u add excessive HNO3, it will most definitely drive the ionisation process back wards, forming H3PO4... so u might want to basify it before u add Fe2+...

 

[CM_Tutor]

I agree with xiao1985's point - in the presence of nitric acid, any phosphat ions will definitely be protonated, and so there is a problem with the anion flow chart.

 

[shazzam]

sylabus updated at the end of 2003 says that you don't need to know what precipitates with what, however you do need to be able to process information ie know your solubility rules.