chemistry

Strontium sulfide

Strontium sulfide 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 Strontium sulfide rather than just read about it. In short: Strontium sulfide is the inorganic compound with the formula SrS. It is a white solid.

Key takeaways

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

Reference excerpt

Strontium sulfide is the inorganic compound with the formula SrS. It is a white solid. The compound is an intermediate in the conversion of strontium sulfate, the main strontium ore called celestite (or, more correctly, celestine), to other more useful compounds.

Production and reactions Strontium sulfide is produced by roasting celestine with coke at 1100–1300 °C. The sulfate is reduced, leaving the sulfide:

SrSO4 + 2 C → SrS + 2 CO2 About 300,000 tons are processed in this way annually. Both luminous and nonluminous sulfide phases are known, impurities, defects, and dopants being important. As expected for a sulfide salt of alkaline earth, the sulfide hydrolyzes readily:

SrS + 2 H2O → Sr(OH)2 + H2S For this reason, samples of SrS have an odor of rotten eggs. Similar reactions are used in the production of commercially useful compounds, including the most useful strontium compound, strontium carbonate: a mixture of strontium sulfide with either carbon dioxide gas or sodium carbonate leads to formation of a precipitate of strontium carbonate.

SrS + H2O + CO2 → SrCO3 + H2S SrS + Na2CO3 → SrCO3 + Na2S Strontium nitrate can also be prepared in this way.

References

External links Strontium Sulfide Info American Elements

Illustrations

Worked examples

Example 1 — a first encounter with Strontium sulfide

Start with the simplest possible case. Write down what Strontium sulfide 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 Strontium sulfide 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 Strontium sulfide 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 Strontium sulfide

In research: Strontium sulfide 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 Strontium sulfide 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: Strontium sulfide is common in secondary-school and first-year university syllabi. It links to neighbouring topics Monosulfides, Rock salt crystal structure, Strontium compounds, so understanding it makes those chapters shorter.
In everyday life: Look for Strontium sulfide 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 Strontium sulfide in 20 minutes

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

Frequently asked questions

What is Strontium sulfide in simple terms?

Strontium sulfide is the inorganic compound with the formula SrS. It is a white solid.

Why does Strontium sulfide 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 Strontium sulfide?

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 Strontium sulfide.