every Diwali Seema silver silver idols kept in the cupboard which look dark and old but she does something and they become sparking what does she do
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Silver idols are very popular in Indian households. But the major problem with them is that they tarnish very easily.
Explanation:
- Metallic silver has a tendency to react with the sulphides or sulphur and its compounds in the air to form silver sulphide. This results in the darkening of silver.
- What Seema does every Diwali is she reverses the chemical reaction of forming sulphides by converting the silver sulphide to metallic silver.
- This she does by heating the silver idols in a pot of hot water lined with aluminium or a foil of aluminium. She adds a little baking soda to it.
- Soon an electrochemical reaction takes place. The metallic aluminium combines with the sulphide of silver sulphide and restores the metallic silver with all its lustre.
- The reaction is: 3Ag2S + Al= 6Ag + Al3S2
Learn more on chemical reactions.
Write some characteristics of chemical reaction.
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