Question

Convert blue vitrol into black oxide

Answer 1

Chemistry of (i) blue vitriol (ii) black oxide of copper (iii) red oxide of copper

Blue vitriol

Copper(II) sulfate is the chemical compoundwith the formula CuSO4. This salt exists as a series of compounds that differ in their degree ofhydration. The anhydrous form is a pale green or gray-white powder, whereas the pentahydrate(CuSO4·5H2O), the most commonly encountered salt, is bright blue. The anhydrous form occurs as a rare mineral known as chalcocyanite. The hydrated copper sulfate occurs in nature aschalcanthite (pentahydrate), and two more rare ones: bonattite (trihydrate) and boothite (heptahydrate). Archaic names for copper(II) sulfate are "blue vitriol" and "bluestone".