(c) Two or three filings of copper were
added to 10ml dilute nitric acid and
stirred.
write down the changes that will be seen in each instance and explain the reason behind
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Copper is an unreactive metal and doesn't react in normal circumstances with dilute acids.
There are actually two equations for the reaction of copper with nitric acid take place. It depends on whether the nitric acid is concentrated or not. If it is concentrated, then the ratio is 1:4 for copper to nitric acid. If it is dilute then the ratio is 3:8.
Concentrated Nitric acid is act as strong oxidising agent so it makes sense that a higher oxidation state of nitrogen (IV) oxide is formed .
Explanation:
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