Colourimetric determination of copper ore

JHRoss

JHRoss

Greetings to everyone,

When it comes to the sample of powdered ore I can use for the A-Levels practical "Determination of copper ore" is it something that I need to order or I could use something that I could find or produce in the prep room?

Regards
 
JHRoss

JHRoss

Well the RCS mentions:

– a simulated copper ore made up with a minimum of 30% by mass of copper(II) carbonate, CuCO3 (s), (HARMFUL – see CLEAPSS Hazcard HC026) thoroughly mixed with dry ‘silver‘ sand

So when it comes to the "silver" sand, could the sand we have in the lab be used?
 
Paul

Paul

JHRoss said:
Greetings to everyone,

When it comes to the sample of powdered ore I can use for the A-Levels practical "Determination of copper ore" is it something that I need to order or I could use something that I could find or produce in the prep room?

Regards
Click to expand...
can you tell us the exam board maybe?
 
Mirage

Mirage

JHRoss said:
Well the RCS mentions:

– a simulated copper ore made up with a minimum of 30% by mass of copper(II) carbonate, CuCO3 (s), (HARMFUL – see CLEAPSS Hazcard HC026) thoroughly mixed with dry ‘silver‘ sand

So when it comes to the "silver" sand, could the sand we have in the lab be used?
Click to expand...
Hmm copper(I) oxide is not good option as if u acidify u get copper sulphate(aq) & copper(s) due to disproportionation ( I think)…my bad. Maybe just use copper carbonate & label it copper ore. I assume the sand is just to make it look more oreish.
 
JHRoss

JHRoss

SAK said:
Hmm copper(I) oxide is not good option as if u acidify u get copper sulphate(aq) & copper(s) due to disproportionation ( I think)…my bad. Maybe just use copper carbonate & label it copper ore. I assume the sand is just to make it look more oreish.
Click to expand...
Many thanks!
 
Paul

Paul

SAK said:
Hmm copper(I) oxide is not good option as if u acidify u get copper sulphate(aq) & copper(s) due to disproportionation ( I think)…my bad. Maybe just use copper carbonate & label it copper ore. I assume the sand is just to make it look more oreish.
Click to expand...
copper ore is usually malachite or greenium (in spotlight science)
 
A

Andrew Symonds

Assuming a fixed weight of ore going to be reacted with sulfuric acid to make copper sulfate and then colour of the filtered solutions measured to determine concentration by extrapolation from data obtained for copper sulfate solutions of known concentrations. I'd say a mixture of clean coarse san and copper carbonate is the best bet.
 
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