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Question

Write the balanced chemical equations for the given reactions: Copper sulphate on treatment with potassium iodide precipitates cuprous iodide(Cu2I2), liberates iodine gas and forms potassium sulphate.


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Solution

Balanced chemical equation: A balanced chemical equation is the representation of a chemical reaction in which the number of atoms of each element is the same on both the reactant and product sides.

Reaction of Copper sulphate with Potassium iodide:

  • When the cuprous sulphate (CuSO4) reacts with potassium iodide (KI), cuprous iodide (Cu2I2) gets precipitated along with the liberation of iodine gas (I2), and potassium sulfate(K2SO4) is also formed as a product at the end of the reaction.
  • The cuprous iodide so formed is a white-colored precipitate.
  • The chemical reaction can be depicted as:

2CuSO4(aq)+4KI(aq)Cu2I2(s)Whitepowder+2K2SO4(aq)+I2(g)


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