Problem 2
Explain, in your own words, why samples can often be separated into their components by chromatography.
Problem 4
In this experiment it takes about 6 microliters of solution to produce a spot \(8 \mathrm{mm}\) in diameter. If the \(\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}\) solution contains about \(6 \mathrm{g} \mathrm{Cu}^{2+}\) per liter, how many micrograms of \(\mathrm{Cu}^{2+}\) ion are there in one spot?
