Here's the balanced chemical equation for the reaction:
2 Cu(NO₃)₂(aq) + 4 KSCN(aq) → 2 CuSCN(s) + 4 KNO₃(aq) + (SCN)₂(aq)
Explanation:
* Copper(II) nitrate (Cu(NO₃)₂) reacts with potassium thiocyanate (KSCN) in an aqueous solution.
* The reaction produces a white precipitate of copper(I) thiocyanate (CuSCN). This is a classic example of a redox reaction, where copper(II) ions (Cu²⁺) are reduced to copper(I) ions (Cu⁺).
* Potassium nitrate (KNO₃) remains dissolved in the solution. It is a spectator ion and does not participate in the main reaction.
* A small amount of thiocyanogen ((SCN)₂) is also produced as a byproduct. This is a highly reactive compound that gives the solution a yellowish color.
Note: The reaction proceeds in several steps. The initial reaction produces a brown precipitate of copper(II) thiocyanate. This precipitate then reacts further to form the white copper(I) thiocyanate.
Important Safety Note: Thiocyanate compounds are toxic. Always handle them with care and avoid contact with skin and eyes.
