Difficult to dissolve in water, soluble in dilute hydrochloric acid and nitric acid, in the air and stability.

难溶于水，易溶于稀盐酸和硝酸，在空气中稳定。

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Nitric acid is sulfuric acid and hydrochloric acid small, easily soluble in water, in the water under the ionization completely colorless transparent, strong dilute solution show brown solution.

硝酸的酸性较硫酸和盐酸小，易溶于水，在水中完全电离，常温下其稀溶液无色透明，浓溶液显棕色。

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Nitric acid is sulfuric acid and hydrochloric acid small, easily soluble in water, in the water under the ionization completely colorless transparent, strong dilute solution show brown solution.

硝酸的酸性较硫酸和盐酸小，易溶于水，在水中完全电离，常温下其稀溶液无色透明，浓溶液显棕色。

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