I am currently trying to figure out how to identify one of three solid substances, any help would be appreciated. EDIT: I need to use chemical reactions for identification. I accidentally wrote copper (II) sulfate because I was also researching how to differentiate between it and copper (II) nitrate, a way other than by mixing with barium nitrate would be appreciated as well.

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    Why, one of them is blue, another hygroscopic, yet another poisonous, and yet another is sold at Walmart. – Ivan Neretin Oct 11 at 11:57
  • Each solid has different special characteristics among them. Copper (II) sulfate will be blue in color which is not the case with remaining three solids , so it is distinguishable just by the color of it. Ammonium Chloride will sublimate will sublimate upon heating which is also unique in it. You can heat Lead Nitrate in presence of Cu turnings or conc. Sulfuric acid which will make brown coloured $\ce{NO2}$ coming out which is unique in itself only. And Flame test will give Sodium and Carbonate by treating with $\ce{BaCl2}$ and precipitate again soluble in $\ce{HCl}$. – Soumik Das Oct 11 at 12:02
  • Lead cation can be identified by Adding Iodide to it and formation of yellow coloured precipitate , which dissolves upon heating and upon cooling again, form needle shaped crystals. (Golden Rain : en.wikipedia.org/wiki/Golden_rain_demonstration) – Soumik Das Oct 11 at 12:04
  • en.wikipedia.org/wiki/… – Karl Oct 11 at 19:36

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