English National Curriculum - Science
Mission Objectives
Recognise a halogen displacement reaction
Describe what happens when chlorine, bromine and iodine react with each other
Explain what happens in a halogen displacement reaction
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Words and meanings to learn
chemical equation
chemical equations show the relative amounts of each substance involved and must be balanced to obey the law of conservation of mass
displacement reaction
a type of chemical reaction in which an element reacts with a compound and takes the place of another element within that compound
reactive
a substance that readily undergoes chemical reactions, often vigorously and rapidly
precipitate
a solid that forms and settles out of a liquid mixture as a result of a chemical reaction; when two aqueous solutions react and form an insoluble product, this solid is known as a precipitate
halogen
a non-metal found in Group 7 of the periodic table; highly reactive
Samantha is an accomplished science educator whose current work centres on curriculum design and professional development, supporting teachers to deliver high-quality science education through evidence-informed approaches. She is a former Head of Chemistry and Sixth Form Tutor with extensive Key Stage 4 and 5 experience, and has worked as an AQA examiner, giving her valuable insight into assessment standards and what students need to succeed.
Underpinning this is a strong foundation in applied science built across a range of industry roles. Samantha has held scientific roles at John Smith's Brewery, Yorkshire Water and WasteCare, where she led technical projects, drove operational efficiencies and ensured compliance with industry standards. Across these roles she has first-hand experience of how scientific knowledge translates into measurable outcomes in professional and commercial environments.
In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket.
Dimple tiles and distilled water.
Access to potassium chloride, potassium bromide and potassium iodide solution and droppers. Less than 2 ml of each solution will be needed.
Chlorine water 0.1%–0.3% (w/v), Bromine water 0.1% (w/v), Iodine solution 0.1 mol dm-3 Potassium chloride solution 0.1 mol dm-3 Potassium bromide solution 0.1 mol dm-3 Potassium iodide solution 0.1 mol dm-3
Refer to CLEAPSS Hazcards and recipe sheets
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