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Rates of Reactions In Relation To
Concentration of Sodium Thiosulphate
Introduction
The speed at which the reaction takes place is called the rate of a reaction. ...
Aim
The aim is to investigate the change in rates of reaction in relation to the concentration of sodium thiosulphate when reacting with hydrochloric acid. ...
1) Temperature
2) Concentration – (or pressure for gases)
3) Catalyst
4) Size of particles – (or surface area)
The theory of how reactions happen
• Reactions can only happen when the reactant particles collide, but most collisions are not successful in forming product molecules. ...
• Different reactions need different catalysts and they are extremely important in industry: examples. ...
o nickel catalyses the hydrogenation of unsaturated fats to margarine
o iron catalyses the combination of unreactive nitrogen and hydrogen to form ammonia
o enzymes in yeast convert sugar into alcohol
o zeolites catalyse the cracking of big hydrocarbon molecules into smaller ones
o most polymer making reactions require a catalyst surface or additive with the monomer molecules.
o They have the advantage of bringing about reactions at normal temperatures and pressures which would otherwise need more expensive and energy-demanding equipment.
Approximate Word count = 1765
Approximate Pages = 7.1
(250 words per page double spaced)
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