chemistry

Nickel(II) nitrate

Nickel(II) nitrate is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Nickel(II) nitrate rather than just read about it. In short: Nickel(II) nitrate is the inorganic compound Ni(NO3)2 or any hydrate thereof. In the hexahydrate, the nitrate anions are not bonded to nickel.

Key takeaways

Nickel(II) nitrate belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Nickel(II) nitrate to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Nickel(II) nitrate from memory before moving on to harder problems.

Reference excerpt

Nickel(II) nitrate is the inorganic compound Ni(NO3)2 or any hydrate thereof. In the hexahydrate, the nitrate anions are not bonded to nickel. Other hydrates have also been reported: Ni(NO3)2.9H2O, Ni(NO3)2.4H2O, and Ni(NO3)2.2H2O. It is prepared by the reaction of nickel oxide with nitric acid:

NiO + 2 HNO3 + 5 H2O → Ni(NO3)2.6H2O The anhydrous nickel nitrate is typically not prepared by heating the hydrates. Rather it is generated by the reaction of hydrates with dinitrogen pentoxide or of nickel carbonyl with dinitrogen tetroxide:

Ni(CO)4 + 2 N2O4 → Ni(NO3)2 + 2 NO + 4 CO The hydrated nitrate is often used as a precursor to supported nickel catalysts.

Structure Nickel(II) compounds with oxygenated ligands often feature octahedral coordination geometry. Two polymorphs of the tetrahydrate Ni(NO3)2.4H2O have been crystallized. In one the monodentate nitrate ligands are trans while in the other they are cis.

Reactions and uses Nickel(II) nitrate is primarily used in electrotyping and electroplating of metallic nickel. In heterogeneous catalysis, nickel(II) nitrate is used to impregnate alumina. Pyrolysis of the resulting material gives forms of Raney nickel and Urushibara nickel. In homogeneous catalysis, the hexahydrate is a precatalyst for cross coupling reactions.

References

Illustrations

Worked examples

Example 1 — a first encounter with Nickel(II) nitrate

Start with the simplest possible case. Write down what Nickel(II) nitrate claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Nickel(II) nitrate before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Nickel(II) nitrate ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Nickel(II) nitrate

In research: Nickel(II) nitrate appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Nickel(II) nitrate in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Nickel(II) nitrate is common in secondary-school and first-year university syllabi. It links to neighbouring topics IARC Group 1 carcinogens, Nickel compounds, Nitrates, so understanding it makes those chapters shorter.
In everyday life: Look for Nickel(II) nitrate outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Nickel(II) nitrate in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Nickel(II) nitrate means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Nickel(II) nitrate out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Nickel(II) nitrate in simple terms?

Nickel(II) nitrate is the inorganic compound Ni(NO3)2 or any hydrate thereof. In the hexahydrate, the nitrate anions are not bonded to nickel.

Why does Nickel(II) nitrate matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Nickel(II) nitrate?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Nickel(II) nitrate.