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February 27 2012 2 27 /02 /February /2012 15:34

I am currently dissolving a bit indium in hydrochloric acid. The bubbling starts slow (like the speed of tin) and then speeds up to  the speed of the dissolution of iron. This is expected based on the electrode potential of indium metal. This reaction is occurring: 2 In + 6 HCl --> 2 InCl2 + 3 H2

 

Indium-dissolving.PNG

 

The indium chloride solution is then neutralized with sodium carbonate to form indium(III) hydroxide, which is difficult to filter.

 

Indium-III--hydroxide.JPG

 

Indium chemistry is very boring: only the element is interesting. Reduction of indium chloride by zinc might produce indium powder which can be pressed together to form a piece of indium metal; this could be an interesting demonstration of the softness of indium.

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Published by LanthanumK - in Experiments
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