When a little brine was added to a metal nitrate a white precipitate was formed which first turned violet and then black on exposure to ai. The metal nitrate is therefore?

EmmanuelOlaposi061

2 years ago

D is very correct
When a little brine (sodium chloride solution) is added to silver nitrate solution, a white precipitate of silver chloride is formed. Upon exposure to air and light, the silver chloride first turns violet and then black due to the formation of finely divided particles of elemental silver.
More explanation:
The initially formed white precipitate of silver chloride undergoes a photochemical reaction in the presence of light, causing the silver chloride to decompose into elemental silver. The elemental silver particles that are formed are very small and finely divided, giving rise to a violet color in the precipitate. Over time, these elemental silver particles may further aggregate and darken, resulting in a black coloration.

Hshdhdhdd

1 year ago

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