Year 11 - Science
Making ammonia
Industrial chemistry
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit covers corrosion, prevention methods, and properties of alloys, ceramics, polymers, and metals. It explores industrial processes like the Haber process, fertiliser production, reaction rates, yields, atom economy, and the trade-offs involving conditions and equilibrium.
Lesson Summary
You will learn to safely produce ammonia in the laboratory.
Key Notes
- Ammonia can be synthesised in the lab by heating a mixture of NH₄Cl and NaOH, producing NH₃ gas and other by-products.
- Ammonia is an alkaline gas that reacts readily with water to form a corrosive, basic solution.
- Ammonia gas turns moist red litmus paper blue, indicating its alkaline nature.
- Ammonia gas is soluble, toxic, and has a pungent smell, requiring careful handling.
- Ammonia reacts with hydrogen chloride (from concentrated hydrochloric acid) to form white fumes of ammonium chloride.
Vocabulary To Learn
- ammonia: a simple molecular substance, with the formula NH₃, is a soluble, toxic, pungent gas at room temperature.
- alkaline: a base that dissolves in water; these solutions have a pH greater than 7
- pungent: a description of a substance that has a sharply strong smell
- toxic: a substance that is poisonous, and can cause harm or death to living organisms
- corrosive: a substance that causes damage by chemical action, often resulting in severe injury or destruction
Common Mistakes To Avoid
- Pupils may think ammonia is safe to handle without precautions because it's a common household chemical.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Ammonia can be synthesised in the lab by heating a mixture of NH₄Cl and NaOH, producing NH₃ gas and other by-products. Ammonia is an alkaline gas that reacts readily with water to form a corrosive, basic solution.
2. Define this scientific word and use it in context. 'ammonia'
a simple molecular substance, with the formula NH₃, is a soluble, toxic, pungent gas at room temperature. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Pupils may think ammonia is safe to handle without precautions because it's a common household chemical. Correction: Emphasise ammonia's toxicity and the importance of using PPE and proper ventilation.
More Lessons In This Unit
- Ammonia: NPK fertiliser production and other applications Study Guide
- Chemical equilibrium Study Guide
- Comparing materials and their properties Study Guide
- Corrosion and its prevention Study Guide
- Corrosion and its prevention: including half equations Study Guide
- Equilibrium: balance between rate, safety, environment and economics Study Guide
- Factors affecting equilibrium Study Guide
- Industrial equilibria: Contact Process Study Guide
- Industrial equilibria: Haber Process Study Guide
- Introduction to reversible chemical reactions Study Guide
- NPK fertilisers, agriculture and other applications Study Guide
- Percentage yield and atom economy Study Guide
- Percentage yield and atom economy (RAM 1 d.p.) Study Guide
- Transition metals Study Guide
- Transition metals: physical and chemical properties Study Guide
- Transition metals: properties and uses Study Guide
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