Question

How does the density of a given substance help us to determine its purity ?

Answer 1

$$\begin{gathered} *** \\ \mathrm{The}\mathrm{density}\mathrm{is}\mathrm{one}\mathrm{of}\mathrm{the}\mathrm{characteristic}\mathrm{properties}\mathrm{of}\mathrm{the}\mathrm{given}\mathrm{substance}. \\ \mathrm{The}\mathrm{density}\mathrm{of}\mathrm{the}\mathrm{substance}\mathrm{remains}\mathrm{constant}\mathrm{under}\mathrm{the}\mathrm{given}\mathrm{conditions}. \\ *** \\ \mathrm{Hence},\mathrm{by}\mathrm{comparing}\mathrm{the}\mathrm{density}\mathrm{of}\mathrm{the}\mathrm{given}\mathrm{substance}\mathrm{with}\mathrm{the}\mathrm{standard} \\ \mathrm{value}\mathrm{of}\mathrm{density}\mathrm{at}\mathrm{the}\mathrm{given}\mathrm{conditions},\mathrm{we}\mathrm{can}\mathrm{tell}\mathrm{about}\mathrm{its}\mathrm{purity}. \end{gathered}$$