English National Curriculum - Science
Mission Objectives
Define the yield of a chemical reaction
Explain the factors affecting the yield
Calculate theoretical mass and percentage yield of a reaction
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Words and meanings to learn
theoretical yield
the maximum mass of product that could be formed from given amounts of reactants, assuming the reaction goes to completion with no losses; this is usually found by using a moles calculation
actual yield
the mass of product actually obtained from a chemical reaction; it is usually less than the theoretical yield because of losses during the process
reversible reaction
a chemical reaction that can go in both directions — reactants form products, and products can reform back into reactants
sustainable production
the process of making products in a way that minimises waste, reduces energy use and limits damage to the environment
percentage yield
a measure of how much product is obtained compared to the maximum possible amount, shown as a percentage
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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.
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In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket.
Resources: Scientific calculators.
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