English National Curriculum - Science
Mission Objectives
Describe how the presence of water affects the products formed during electrolysis of aqueous solutions
Predict and explain the products of electrolysis of aqueous solutions, including the formation of a third product
(HT) Write balanced half-equations for the reactions occurring at each electrode
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Words and meanings to learn
aqueous solution
a solution in which water is the solvent; in chemistry, this is denoted by the state symbol (aq), indicating that a substance has dissolved in water
hydroxide
refers to the OH⁻ ion; it is commonly produced when an alkali dissolves in water, forming a solution that releases hydroxide ions
brine
a concentrated aqueous solution of salt, typically sodium chloride dissolved in water
discharge
refers to the process by which ions gain or lose electrons at an electrode, forming neutral atoms or molecules (e.g., metals, hydrogen, halogens)
halide
a negatively charged (–1) ion formed when an element from Group 7 (the halogens) gains an electron; common examples include Cl⁻, Br⁻, and I⁻
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.
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