Tuesday, March 26, 2019

Rate of Reaction Coursework Essay -- GCSE Chemistry Coursework Investi

Rates of ReactionA chemic chemical reaction can only occur amidst particleswhen they collide (hit severally other).Particles may be atoms, ions or molecules. there is a minimum amount of thrustwhich colliding particles need in order to react with each other.If the colliding particles have less(prenominal) than this minimum energythen they just bounce off each other and no reaction occurs.This minimum energy is called the activation energy.The fleet the particles are going, the more energy they have.Fast moving particles are more likely to react when they collide.You can make particles move more cursorily by heating them up(raising the temperature).Changing the Rate of a Reaction.There are 5 ways to increase the grade of a chemical reaction.They are all understood in terms of collision theory.The rate of a chemical reaction may be increased by1) Raising the temperature.2) Increasing the concentration (in resolution).3) Increasing the pressure (in gases).4) Increasing the ori ginate area of a solid.5) Use a catalyst.Measuring the Rate.The reaction between sodium thiosulphate solutionand dilute hydrochloric acid.HCl + sodium thiosulphate arrowsodium chloride + sulphur dioxide +sulphur + water.HCl(aq) + Na2S2O3(aq) arrow NaCl(aq) + SO2(g) + S(s) + H2O(l)The solid sulphur (S(s)) formed in this reactionmakes the colorless solution go cloudy.The reaction is usually carried out in a flaskfulplaced on a piece of white paper which has a ...

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