WHATs the colour of alkali metals in ammonia solution both in lower & higher concentrations..???

Question

do giv the reason of the appearance of diffrnt colour in both cases..!!!

Answer 1

All Alkali metals dissolve in liquid ammonia to form blue ppt.

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Answer 2

Metal-Ammonia Solutions
For over a hundred years, chemists have known about the unusual properties of solutions formed when alkali metals dissolve in liquid ammonia (NH3).
At low concentrations, a metal-ammonia solution is blue, and it behaves like an electrolyte -- the metal atoms lose one electron and become positively charged ions, and the free electrons in solution act like negative ions. There is electrical conductivity, similar to salt in water or battery acid, but the conductivity is more like an insulator than a metal.

At high concentrations, around 10 percent metal and higher, the solution changes to a coppery-bronze color. Along with the color change comes a shift to the high electrical conductivity of a liquid metal. How does the change occur? What exactly happens to shift the electronic state from insulator to metal? Experiments have measured the change, and theorists have been able to speculate about how it happens. Until recently, however, the computing power wasn't available to provide detailed, quantitative understanding.

best answer?

Answer 3

at lower it is blue irrespective of the alkali metal u place
at higher it is bronze

the colour certainly is on account of ammoniated electrons produced in ammonia solution by these metals

for ex

Na + (x+y)NH3 - Na(NH3)x + e(NH3)y
ammoniated e

Answer 4

Blue solution. an they do possess electrical conductivity due to presence of ammoniated electrons and the metal ions in solution.

Answer 5

They form clear blue solutions. The colour is believed to be due to solvated electrons.
The metal dissolves A(s) --> A+(solvated) + e-(solvated)

Answer 6

white colour