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The reaction between dilute Nitric acid and Arsenic forms to quote from Wikipedia:

"Arsenic makes arsenic acid with concentrated nitric acid, arsenious acid with dilute nitric acid". As such, the indicated reactions are:

5 (Conc) HNO3 + As --> H3AsO4 + 5 NO2 + H2O

3 (Dilute) HNO3 + As --> H3AsO3 + 3 NO2

This reaction is very interesting as it is a rare example of the formation of nitrogen dioxide from only dilute nitric acid.

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10y ago
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12y ago

H3AsO4(aq) + 3NaOH(aq)===> Na3AsO4(aq) + 3H2O(l)

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8y ago

Arsenic acid (with concentrated HNO3) and arsenious acid (with diluted HNO3) are obtained.

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Q: Reaction between arsenic acid with sodium hydroxide?
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