chemistry

Holmium(III) nitrate

Holmium(III) 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 Holmium(III) nitrate rather than just read about it. In short: Holmium (III) nitrate is an inorganic compound, a salt of holmium and nitric acid with the chemical formula Ho(NO3)3. The compound forms yellowish crystals, dissolves in water, also forms crystalline hydrates.

Key takeaways

Holmium(III) 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 Holmium(III) nitrate to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Holmium(III) nitrate from memory before moving on to harder problems.

Reference excerpt

Holmium (III) nitrate is an inorganic compound, a salt of holmium and nitric acid with the chemical formula Ho(NO3)3. The compound forms yellowish crystals, dissolves in water, also forms crystalline hydrates.

Synthesis Anhydrous salt is obtained by the action of nitrogen dioxide on holmium(III) oxide:

2 H o 2 O 3 + 9 N 2 O 4 → 150 o C 4 H o ( N O 3 ) 3 + 6 N O {\displaystyle {\mathsf {2Ho_{2}O_{3}+9N_{2}O_{4}\ {\xrightarrow {150^{o}C}}\ 4Ho(NO_{3})_{3}+6NO}}}

Effect of nitrogen dioxide on metallic holmium:

H o + 3 N 2 O 4 → 200 o C H o ( N O 3 ) 3 + 3 N O {\displaystyle {\mathsf {Ho+3N_{2}O_{4}\ {\xrightarrow {200^{o}C}}\ Ho(NO_{3})_{3}+3NO}}}

Reaction of holmium hydroxide and nitric acid:

H o ( O H ) 3 + 3 N H O 3 → 150 o C H o ( N O 3 ) 3 + 3 H 2 O {\displaystyle {\mathsf {Ho(OH)_{3}+3NHO_{3}\ \xrightarrow {150^{o}C} \ Ho(NO_{3})_{3}+3H_{2}O}}}

Physical properties Holmium(III) nitrate forms yellowish crystals. Forms a crystalline hydrate of the composition Ho(NO3)3•5H2O. Soluble in water and ethanol.

Chemical properties Hydrated holmitic nitrate thermally decomposes to form HoONO3 and decomposes to holmium oxide upon subsequent heating.

Application The compound is used for the production of ceramics and glass. Also used to produce metallic holmium and as a chemical reagent.

References

Illustrations

Worked examples

Example 1 — a first encounter with Holmium(III) nitrate

Start with the simplest possible case. Write down what Holmium(III) 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 Holmium(III) 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 Holmium(III) 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 Holmium(III) nitrate

In research: Holmium(III) 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 Holmium(III) 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: Holmium(III) nitrate is common in secondary-school and first-year university syllabi. It links to neighbouring topics Holmium compounds, Nitrates, so understanding it makes those chapters shorter.
In everyday life: Look for Holmium(III) 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Holmium(III) nitrate” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Holmium(III) nitrate in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Holmium(III) 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 Holmium(III) nitrate out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Holmium(III) nitrate in simple terms?

Why does Holmium(III) 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 Holmium(III) 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 Holmium(III) nitrate.