When an alkali metal dissolves in liquid ammonia , the solution can acquire different colours . Explainthe reasons for this type of colour change .

When an alkali metal dissolves in liquid ammonia , the solution can ac

1.	When an alkali metal dissolves in liquid ammonia , the solution can acquire different colours . Explainthe reasons for this type of colour change .
Answer» Solution :The dilute solution of alkali metals in liquid AMMONIA exhibit dark blue colour because ammoniated electrons absorb energy corresponding the red region of the visible light . `M + (x + y) NH_(3) to [M (NH_(3))_(x) ]^(+) + underset("Ammoniated electrons")(e^(-) (NH_(3))_(y))` However , if the concentration INCREASES above 3M, the colour CHANGES to copper-bronze and the solution acquires metallic lustre due to the formationof METAL ion clusters.