Struggling with this one tbh...
Anyone? Thanks in advance.
hey
It's perfectly normal to find some qs tough, that's what we're here for
Part (a)If we just read off the graph, the concentration of the copper in the solution is about 7.0 μg/ml
Part (b)The volume of the solution was 200 ml (
not 200+10=210 ml because it says it was "
diluted to 200 ml")
So, the mass of copper is: 7.0 μg/ml x 200 ml = 1.4 mg
Part (c)Assuming that the sample is indicative of all the ore, we can say the ratio of copper to ore is the same
ie copper:ore = 0.0014:2 (since we found 1.4 mg in the 2 g sample)
So, in 1 tonne: m(Cu) = 0.0014/2 x 1 = 0.0007 tonnes = 700g
Now is it commercially viable?
It must have a concentration of >0.4% w/w.
From the sample, %w/w = 0.0014/2 = 0.0007 = 0.07 %w/w so it is not commercially viable