Try 30% và heat it khổng lồ 80C. All of the chloride should be exhausted after a day or less. You can then evaporate the solution khổng lồ generate crystals of nickel chloride. Any work with nickel compounds should always be done in a well-ventilated hood.
Bạn đang xem: Ni + hcl = nicl2 + h2
The reaction is given here.
$$ceNi + 2HCl → NiCl2 + H2$$
Nickel react with hydrogen chloride to lớn produce nickel(II) chloride & hydrogen. Hydrogen chloride - diluted solution. This reaction takes place slowly.
In the wikipedia page of nickel, the reaction is explained elaborately:-
Nickel(II) chloride is produced by dissolving nickel or its oxide in hydrochloric acid. It is usually encountered as the green hexahydrate, the formula of which is usually written $ceNiCl2•6H2O$. When dissolved in water, this salt forms the metal aquo complex $ce
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answered Jul 14, năm nhâm thìn at 3:50
Nilay GhoshNilay Ghosh
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This is called passivation of metal surface. For a similar reason aluminum doesn"t dissolve in water, but Al/Hg amalgam reacts with water. In case of Al Al2O3 film prevents the reaction. In case of Ni you probably form a thin layer of NiCl2 that isn"t very soluble in concentrated HCl. Try diluting HCl by adding 2-3 volumes of water. Stirring should help. Fine powder will react faster than big pieces of metal.
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answered Jul 17, năm 2016 at 21:10
sixtytreessixtytrees
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In my PM refining lab I frequently use straight HCl 32% to lớn remove surface nickel from my metallic products (post-first melt) containing predominately Au/Ir. The nickel easily bubbles away into a green solution that eventually turns yellow. I then pour it off into my nickel-saver beaker. If the nickel is extremely susceptible khổng lồ HCl, the nickel might be in the khung of an oxide.
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answered Feb 28, 2018 at 10:43
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