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GCSE Chemistry · key term
The product that the reaction is intended to make.
Used by AQA, Edexcel and OCR
Specification 4.3.3.2 · Paper 1
Revise: Atom EconomyThe desired product must be identified before atom economy can be calculated. The same equation could have a different atom economy if a different product were wanted.
Specification 5.13C, 5.14C · Paper 1
The product that a chemical process is intended to make.
Revise: Atom Economy DefinitionChemists may want one of them—the desired product—while the others are by-products.
The product that a reaction is intended to make.
Specification CM5.1v, C5.1i, C5.1j, C5.1k · Paper 2 (Foundation), Paper 4 (Higher)
The product that the reaction is being used to make.
Revise: Yield and Economy CalculationsNevertheless, not all reactant atoms necessarily enter the desired product. Some may enter other products, called by-products.
The useful product that a reaction is intended to make.
The useful substance that a reaction is intended to make.
The product that a process is intended to manufacture.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
The substance that a chemical process is intended to make.
Revise: Atom economy definitionAtom economy is a measure of the proportion of the atoms in the reactants that become part of the desired product. It is usually expressed as a percentage. The desired product is the substance the process is intended to produce.
Use only the desired product in the numerator, but include every reactant in the denominator.
Describe atom economy as the percentage of the products’ total mass that forms the desired product; do not simply call it the amount of product made.
Identify the desired product before discussing atom economy, because another product from the same reaction may be unwanted.
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