Question
What does violet colour of the solution in the activity mentioned in Q.2 indicate?
✓
Answer
In the reaction, the reactant $Co \left( H _2 O \right)_6^{2+}$ is pink in colour and the product $CoCl _4^{2-}$ is blue in colour. When the solution contains both the reactant and product, the resulting solution will appear violet. This indicates that the reaction has attained equilibrium (that is, the reaction proceeds in both the direction with equal rates and is a reversible reaction).
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c. Addition of $BaSO_{4(s)}$_
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