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Strontium nitrate formula is an inorganic chemical compound with the molecular formula Sr(NO3)2. Strontium nitrate is an odorless white crystalline powder. It is highly soluble in water. While Strontium nitrate is non-combustible, it accelerates the combustion process. The compound is widely employed as a colorant and oxidizer in fireworks and crackers.
- Strontium Nitrate Formula is Sr(NO3)2
- The molecular mass of strontium nitrate is 211.63g/mol.
- It is soluble in ammonia and water.
- Strontium nitrate is a potent oxidizing agent.
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Key Terms: Strontium Nitrate, Oxidising Agent, Water Soluble, Base, Pigment.
Strontium Nitrate Formula
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The formula for strontium nitrate is Sr(NO3)2. The other names for the compound are- strontium dinitrate and strontium nictrium. Strontium nitrate is prepared by the reaction of nitric acid with strontium carbonate. The reaction equation is shown below-
2HNO3 +SrCO3 → Sr(NO3)2 + H2O + CO2
- The density of anhydrous strontium nitrate is 2.986 g/mol,
- The density of strontium tetrahydrate (Sr(NO3)2.6H2O) is 2.20 g/mol.
- The boiling point of strontium nitrate is 645℃.
- The melting point of anhydrous strontium nitrate is 570℃.
- Strontium nitrate tetrahydrate decomposes at 100℃.
Strontium Nitrate Formula Structure
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Strontium nitrate is formed when two nitrate ions bond with a strontium cation. The crystal structure of strontium nitrate is cubic for anhydrous and monoclinic for tetrahedral. The overall geometry of the compound is trigonal planar.
Structure of Strontium Nitrate
Properties of Strontium Nitrate Formula
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The characteristic properties of strontium nitrate are-
- Strontium nitrate is a non-combustible compound.
- It is a strong base.
- It is a non-flammable compound.
- Strontium nitrate in aqueous solution reacts with sodium sulfate to produce sodium nitrate and strontium sulfate. The reaction equation is as follows-
Sr(NO3)2 (aq) + Na2SO4 (aq) →SrSO4(s) + 2NaNO3(aq)
- Strontium nitrate reacts with ammonium sulfate to yield strontium sulfate. The reaction equation is-
Sr(NO3)2 (aq) + (NH4)2SO4 (aq) →SrSO4(s) + 2NH4NO3(aq)
Uses of Strontium Nitrate
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The uses of strontium nitrate are-
- Strontium nitrate is used as a red colorant in fireworks and crackers.
- Light signals and railroad flares employ strontium nitrate as a pigment.
- Strontium nitrate reduces skin irritation and enhances appearance of skin when mixed with glycolic acid.
- It is used in electrophysiological experiments.
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| Mercuric Chloride | Rubidium | Potassium Chromate |
| Magnesium Chloride Formula | Chlorine | Calcium |
Things to Remember
- The formula for strontium nitrate is Sr(NO3)2.
- Strontium nitrate is a strong oxidizing agent.
- Strontium nitrate is basic in nature.
- The crystal structure of anhydrous strontium nitrate is cubic.
- Strontium nitrate when mixed with glycolic acid enhances appearance of the skin.
Read More: Strontium Chloride
Sample Questions
Ques. What is the chemical formula for Strontium Nitrate? (1 mark)
Ans. The chemical formula for strontium nitrate is Sr(NO3)2. strontium nitrate is an odorless, white inorganic compound.
Ques. Is strontium nitrate flammable? (1 mark)
Ans. Strontium nitrate is an inflammable compound but it can help in speeding up the combustion process. In extreme cases, it might explode due to intense heat exposure.
Ques. What happens when strontium nitrateis heated for a few minutes? (2 marks)
Ans. Strontium nitrate when heated for a few minutes produces strontium oxide, nitrogen dioxide and oxygen. Strontium oxide is a white powder and nitrogen dioxide is released in the form of brown gas which is visible. The equation for this reaction is given as-
Sr(NO3)2 → SrO + NO2 + O2
Ques. What are the hazards of working with strontium nitrate? (4 marks)
Ans. The hazards of working with strontium nitrate are-
- Inhalation of strontium nitrate can cause irritation in the lungs and throat.
- Extreme exposure to strontium nitrate can harm your heart, kidneys, liver and nervous system.
- When exposed to high concentrations, it can accumulate in bones and cause adverse effects.
- Upon contact with the skin it irritates the skin.
Ques. Does strontium nitrate react with sodium carbonate? (2 marks)
Ans. Yes, strontium nitrate reacts with sodium carbonate and produces strontium carbonate in the form of precipitates. Sodium nitrate is also formed . The reaction equation is-
Sr(NO3)2 + Na2CO3 →SrCO3 + 2NaNO3
Ques. How many grams of strontium nitrate are required to prepare 250.0 ml of 0.100M Sr(NO3)2 solution? (5 marks)
Ans. We have volume = 250 mL = 0.25L
Multiplying the molarity of strontium nitrate by volume, we get
0.25*0.100= 0.025 moles of strontium nitrate
Molecular weight os strontium nitrate= 211.62 amu
Multiplying No. of moles by molecular mass, we get
Given mass = No. of moles* Molar mass =0.025*211.62= 5.29
Thus 5.29 grams of strontium nitrate is required to prepare 250.0 ml of 0.100M Sr(NO3)2solution.
Ques. Is strontium nitrate acidic? (1 mark)
Ans. Strontium nitrate is not acidic. It is known as one of the strong bases.
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