Rates of Reactions :: GCSE Chemistry Coursework Investigation

Rates of ReactionsAimI am going to investigate how the set out of the reply between atomic number 11thiosulphate and hydrochloric acid depends on the concentration ofsodium thiosulphate.The reaction rate of a chemical reaction is the bucket along of production ofproducts from reactants.Sodium thiosulphate + hydrochloric acid == sodium chloride + sulphurdioxide + water + sulphurNa2S2O3 (aq) + 2HCl (aq) == 2NaCl (aq) + SO2 (aq) + H2O (l) + S(s)The solid sulphur (S(s)) organise in this reaction makes the colourlesssolution go cloudy.FactorsThe factors I swear that will affect what happens in theinvestigation are* Catalyst- A gun s a substance which alters the rate of a chemical reaction but is chemically unchanged at the end of the reaction.- A accelerator pedal speeds up a reaction an inhibitor (a substance) slows it down.* niggardness- The to a greater extent concentrated the faster the rate (note in some cases the rate may be unaffected by the concentration of a particul ar reactant provided it is present at a negligible concentration). Remember for gasses, change magnitude the pressure simply increases the concentration so thats the aforesaid(prenominal) thing.* Surface area- greater open air area and since the reaction occurs at the surface we get a faster rate.* Temperature- Usually reactions speed up with increasing temperature (100C rise doubles rate).The collision theoryParticles need to shake up with each other to react and the collisiontheory is all almost this. The after part be affected by the temperature ofthe particles, the concentration of the particles, whether a particle acceleratoris use or the surface area (if the particles are solid).Temperature affects the rate of a reaction because if particles arecold, they move slowly and on that point are few collisions between them. Butwhen they are heated up they move frequently faster or you can in any case say theyhave more kinetic energy. When the move faster there is more of a detect of a collision. More collisions operator that the reaction goesfaster - its rate increases.Concentration of the acid used also affects the rate because whenthere is a high concentration (more acid) there are more particlesto collide with each other-more collisions means that the reactiongoes faster.A catalyst is a substance that can speed up a chemical reactionwithout actually being used up in the reaction. It gives the particlesa surface to stick to so they can collide with each other there - morecollisions. Again when there are more collisions this causes thereaction to go faster.Surface area also affects the rate of a reaction if the particles are