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2. Solubility chart - Wikipedia

   en.wikipedia.org/wiki/Solubility_chart

   The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.

3. Nickel(II) nitrate - Wikipedia

   en.wikipedia.org/wiki/Nickel(II)_nitrate

   Nickel nitrate is the inorganic compound Ni(NO 3) 2 or any hydrate thereof. In the hexahydrate, the nitrate anions are not bonded to nickel. Other hydrates have also been reported: Ni(NO 3) 2. 9H 2 O, Ni(NO 3) 2. 4H 2 O, and Ni(NO 3) 2. 2H 2 O. [3] It is prepared by the reaction of nickel oxide with nitric acid: NiO + 2 HNO 3 + 5 H 2 O → Ni ...

4. Solubility table - Wikipedia

   en.wikipedia.org/wiki/Solubility_table

   Units of solubility are given in grams of substance per 100 millilitres of water (g/100 ml), unless shown otherwise. The substances are listed in alphabetical order ...

5. Nitrate test - Wikipedia

   en.wikipedia.org/wiki/Nitrate_test

   Nitrate Test by using Brown Ring Test. A common nitrate test, known as the brown ring test [2] can be performed by adding iron(II) sulfate to a solution of a nitrate, then slowly adding concentrated sulfuric acid such that the acid forms a layer below the aqueous solution. A brown ring will form at the junction of the two layers, indicating the ...

6. Nickel organic acid salts - Wikipedia

   en.wikipedia.org/wiki/Nickel_organic_acid_salts

   Nickel formate Ni(HCOO) 2.2 H 2 O decomposes when heated to yield carbon dioxide, carbon monoxide, hydrogen, water and finely divided porous nickel. [2] All the nickel atoms are six coordinated, but half have four water molecules and two formate oxygens close to the atom, and the other half are coordinated by six oxygens of formate groups. [3]

7. Nickel compounds - Wikipedia

   en.wikipedia.org/wiki/Nickel_compounds

   Nickel(II) hydroxide Ni(OH) 2, the main hydroxide of nickel is coloured apple green. It is known as the mineral theophrastite. β-NiO(OH) is a black powder with nickel in the +3 oxidation state. It can be made by oxidising nickel nitrate in a cold alkaline solution with bromine.

8. Nickel bis(dimethylglyoximate) - Wikipedia

   en.wikipedia.org/wiki/Nickel_bis(dimethylglyoximate)

   It is surrounded by two equivalents of the conjugate base (dmgH −) of dimethylglyoxime (dmgH 2). The pair of organic ligands are joined through hydrogen bonds to give a macrocyclic ligand . The complex is distinctively colored and insoluble leading to its use as a chelating agent in the gravimetric analysis of nickel.

9. Nickel(II) perchlorate - Wikipedia

   en.wikipedia.org/wiki/Nickel(II)_perchlorate

   Nickel(II) perchlorate is a collection of inorganic compounds with the chemical formula of Ni(ClO 4) 2 (H 2 O) x.Its colors of these solids vary with the degree of hydration. For example, the hydrate forms cyan crystals, the pentahydrate forms green crystals, but the hexahydrate (Ni(ClO 4) 2 ·6H 2 O) forms blue crystals.