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Questions and Answers
What is the primary use of Sr-89 chloride injection in medical treatments?
What is the primary use of Sr-89 chloride injection in medical treatments?
Which test would yield a crimson red flame when strontium is present?
Which test would yield a crimson red flame when strontium is present?
What potential risk does strontium pose in relation to calcium in the human body?
What potential risk does strontium pose in relation to calcium in the human body?
Which statement about strontium's occurrence is true?
Which statement about strontium's occurrence is true?
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What is produced when strontium reacts with water?
What is produced when strontium reacts with water?
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Study Notes
Strontium Overview
- SrCl2 acts as a temperature desensitizing agent, minimizing sensitivity to extreme temperatures.
- Sr-89 chloride injections are utilized palliatively to alleviate bone pain in patients with skeletal metastases.
- Strontium is employed in pyrotechnics, specifically in creating red signal flares.
- Common sources of strontium include strontianite (SrCO3) and celestite (SrSO4).
- Strontium mimics calcium in biological systems, posing a risk as it can substitute calcium in bones.
Properties of Strontium
- Strontium is malleable, allowing it to be shaped without breaking.
- It reacts violently with water, producing hydrogen gas as a byproduct.
- Although strontium has a similar relative abundance to carbon and sulfur, it does not exist in a free state, always being found in compounds.
Identification Tests for Strontium
- Flame Test: Produces a crimson red color, identifying the presence of strontium.
- Biphosphate Test: Involves sodium biphosphate (Na2HPO4), ammonia (NH3), and ammonium chloride (NH4Cl) to yield a white precipitate of strontium phosphate (Sr3(PO4)2), which dissolves in hydrochloric acid (HCl) and re-precipitates upon NH3 addition; distinguishes strontium from lithium.
- Sulfate Test: Treating the substance with sulfuric acid (H2SO4) results in a white precipitate of strontium sulfate (SrSO4).
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Description
This quiz covers the essential properties and applications of strontium, including its role as a temperature desensitizing agent and its use in medical treatments. Explore identification tests and the chemical behavior of strontium in various contexts. Test your knowledge on its sources and biological implications.
