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Suppose a solution is tested for nitrite ion by adding 3M sulfuric acid and heating, repeating this process until no further reaction occurs. This solution is then analyzed for nitrate ion by adding iron (II) sulfate solution and more sulfuric acid, heating the test tube and its contents. The nitrate ion reaction is positive. In this case, is it accurate to state that nitrate ion was present in the original solution? Brie?y explain, referencing specific chemical reactions to support your explanation.

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