When copper(Cu) metal reacts with nitric acid(HNO3) according to the equationCu + 4HNO3 [yields] Cu(NO3)2 + 2NO2 + 2H2OWhich of the following does [u]not[/u] occur?a) bubbles evolve vigorouslyb) the solution changes from colorless to redc) a cloud of red toxic gas evolves around the beakerd) copper is eventually completely consumede) the beaker where the reaction occurred melts. I think I remember (d) being true, along with (b), and (c). If anyone has some input, I'd appreciate it.
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Copper is oxidized by concentrated nitric acid, HNO3, to produce Cu2+ ions; the nitric acid is reduced to nitrogen dioxide, a poisonous brown gas with an irritating odor: Cu(s) + 4HNO3(aq) ——> Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l) When the copper is first oxidized, the solution is very concentrated, and the Cu2+ product is initially coordinated to nitrate ions from the nitric acid, giving the solution first a green, and then a greenish-brownish color.
when copper(Cu) reacts with nitric acid(HNO3) : Cu + 2HN03 -> CuNO3 + NO2< ↑> + H2O
