Not oxidized by air under ordinary conditions. 2732º Density 9.91 g/cm 3 Characteristics: Nickel is a silvery-gray metal. Characteristic Reactions of Ni²⁺ Aqueous Ammonia Sodium Hydroxide Dimethylglyoxime Sulfide No Reaction Most common oxidation state: +2 M.P. It is a neutralization reaction that takes place between a weak acid, the ammonium ion, and a strong base, sodium hydroxide. Yes, Ammonia and sodium hydroxide react with each other. However, with excess ammonia it redissolves with the formation of the hexaammine complex ion.
With ammonia, Ni2+ initially forms a precipitate of nickel(II) hydroxide. Pour half the nickel ethylene diamine solution into a small hydrometer and add the DMG solution dropwise to form the red. Consult the regulatory requirements of the US Department of Transportation before shipping.
Ammonium hydroxide may be shipped via air, rail, road, and water, in containers bearing warning labels that differ depending upon the density, specific gravity, and percent composition of the solution being shipped.
Fires involving ammonium hydroxide may be extinguished with dry chemical, CO2, Halon, water spray, fog, or standard foam.
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