How to Perform Flame test? (1 Viewer)

[wrxsti]

How exactly do we perform a flame test (we didnt do this in class) :S

 

[Forbidden.]

The flame test we performed in our test (worth 25% ) involved spraying a solution into a flame containing the cation of interest which turned a different colour.

 

[brenton1987]

You can also soak wood splints in the solution and let it dry before waving them through the flame.
All you need to do is get the cation into the flame. It doesnt matter how you go about it.

 

[chousta]

How exactly do we perform a flame test (we didnt do this in class) :S

we used an "ATOMISER", fancy word my teacher uses but it really the same thing that hairdressers use to spray water on your hair with-or if u go to a fancy school u mught have used platnm wire. But in the public system.......u spray and learn......

 

[brenton1987]

or if u go to a fancy school u mught have used platnm wire. But in the public system.......u spray and learn......

I went to a fancy school and we used spray bottles.

 

[xiao1985]

You may also use platinum wire, soak in 4M HCl and dip into the salt of question, then into the flame.

 

[chocolate_lover]

I went to a fancy school and we used spray bottles.

I'm the opposite; I go to a public school and I didn't use spray bottles (I used a wire... yeah, it could've been platinum.)

 

[shallumstuart]

I beleive the proper wire thing is first put a Pt wire in the flame, then clean in conc. HCl, dip into the solution you are testing, then into the flame to see the color it burns.
You can also use a spray bottle filled with the solution you are testing, or use a paddle pop stick soaked in the solution and put that into the flame

 

[brenton1987]

(I used a wire... yeah, it could've been platinum.)

If it wasnt platinum your wire could dissolve and contaminate your results. Platinum is one of the few metals that does not dissolve in concentrated hydrochloric acid.

 

[chocolate_lover]

If it wasnt platinum your wire could dissolve and contaminate your results. Platinum is one of the few metals that does not dissolve in concentrated hydrochloric acid.

Yeah, that makes sense, thanks.

Lol, I guess I wasn't paying that much attention that day...

 

[mzduxx2006]

How exactly do we perform a flame test (we didnt do this in class) :S

ok basically u get a hydrous solution of various cations.

spray them into a bunsen burner flame.

observe the flame color change with a labratory spectrascope.

ur results should be:

calcium- red
copper- blue/green
strontium- red
barium- green
sodium- yello
potassium- purple.

 

[chousta]

If it wasnt platinum your wire could dissolve and contaminate your results. Platinum is one of the few metals that does not dissolve in concentrated hydrochloric acid.

ACTUALLLLLLLLY MATE...... it could have been NICHROME WIRE

which may be used instead of platinum

 

[morganforrest]

lol...we were heaps dodgy. We got a heating basin and poured some of the substance of interest in, add conc HCl and direct bunsen flame into it. Observe colour. Reminsice about dodginess of performed pracs.

 

[loverboy]

i dnt go to a fancy school and we used platinum wire

 

[chocolate_lover]

lol...we were heaps dodgy. We got a heating basin and poured some of the substance of interest in, add conc HCl and direct bunsen flame into it. Observe colour. Reminsice about dodginess of performed pracs.

That reminds me; I did that AND the platinum wires. :uhhuh: