Question

Copper \[\left( {II} \right)\] Sulphate solution is:
A.Red
B.Purple
C.Orange
D.Green
E.Blue

Answer 1

Hint: Copper $\left( {II} \right)$ Sulphate is also known as copper sulphate. This is the inorganic compound which has chemical formula that goes like $CuS{O_4}{\left( {{H_2}O} \right)_x}$ , here x ranges from $0 - 5$, the mostly used is pentahydrate where $x = 5$.

Complete step-by-step answer:The copper sulphate or copper $\left( {II} \right)$sulphate is also called as blue vitriol, bluestone, the vitriol of copper, cupric sulphate, chalcanthite and Roman vitriol. So, it’s pretty much understood that the solution of copper $\left( {II} \right)$ sulphate is blue. As the molecular formula of copper $\left( {II} \right)$sulphate goes like$CuS{O_4}$, the molar mass is$143 \cdot 61g/mol$ . The solution appears to be blue solid crystals when hydrated and white solid when anhydrous. The copper sulphate is formed or produced industrially by treating copper metal with hot concentrated sulphuric acid or its oxides with dilute sulphuric acid. Copper sulphate is preferred to use in the laboratories. Copper sulphate is hydrated, so, therefore, it is a blue solid solution attached to water molecules. It is usually $5$ molecules of water attached to one molecule of copper sulphate. Copper sulphate is the most important and is widely used of all copper compounds. Copper sulphate is used in agriculture, in paints and covering industries, in electrical applications, in the production of other chemicals, and in other industrial and commercial industries.
The reason why the solution of copper $\left( {II} \right)$ sulphate is pale blue or cyan is because it absorbs light in the red region of the spectrum.

Note: Copper is a great conductor of electricity, it is used to make copper wires, and other devices which are used to conduct heat or electricity. copper is also a transition metal which leads to a blue flame when it is heated.