Standard solution, working out concentration

Question

Hi,

So In a practical I used 325mg of a solvent and I dissolved this in water to make it up to 25ml.

Now I have to work out the exact concentration of my ''stock'' solution in mg/l

is it 0.013 mg/l...?

Thank you for helping.

Answer 1

First of all, I think you meant that you dissolved 325 mg of a solute (not a solvent). Anyway, if you dissolved 325 mg in a total final volume of 25 ml, you will then have 325 mg/25 ml = 13 mg/ml, not 0.013 mg/ml. This would be the value of g/ml, i.e. you would have a concentration of 0.013 g/ml which is = 13 mg/ml