Rates of Reaction - The concentration of hydrochloric acid and the rate of reaction with sodium theosulphate :: GCSE Chemistry Coursework Investigation

Rates of Reaction - The dousing of hydrochloric acid and the score of reply with sodium theosulphateIntroductionDuring a chemical reaction, particles bump or so with each other. Thiscollision causes reliable bonds to break and new ones to be defecateed. A true amount of energy is needed to whollyow a reaction to engross place.This is called the activation energy its the minimum quantity ofenergy that is required. There are certain factors that can affect therate of reaction. These are surface range, temperature, concentrationand catalysts.The surface area is a very big factor in the rate of reaction.Reactions only occur on the surface, because this is where thecollisions impart occur. If a solid is mortified into smaller pieces, thesurface area is accessiond. This leaves more area where the reactioncan take place, thus increasing the rate. If the reactant is in theform of one large solid, the reaction go out take longer, hencedecreasing the rate.The temperature is also a major factor. When the temperatureincreases, the particles consequently heat up. This causes the kineticenergy in them to increase, thitherfore they move around faster. This slosheds that the rate in which they collide with one another willincrease.By increasing the concentration of something, more particles areintroduced in the same volume. This would mean that the likelihood ofcollisions will increase. This would increase the rate of reaction. Onthe opposite angle, the lower the concentration, the less chance ofcollisions. Therefore the rate of reaction will decrease.Catalysts can be found in the form of transition metals. These speedup the rate of reaction. However, the catalysts themselves are notused up.AimOur aim is to see how the change in concentration of hydrochloric acid great power affect the rate at which it reacts with sodium theosulphate.PredictionWhen sodium theosulphate and hydrochloric acid react together, manyproducts are created.Na2 S2 O3 (aq) + 2HCl (aq) 2NaC l (aq) +H2O (l) + SO2 (aq) +S (s)The equation above shows all the products of the reaction betweenhydrochloric acid and sodium theosulphate. The products are sodiumchloride (aqueous solution), water ( silver-tongued state), sulphur dioxide (aqueoussolution) and sulphur (solid).The sulphur, being a solid, turns to liquid cloudy and opaque. Acertain amount of sodium is needed to turn the solution cloudy enoughto be opaque.Increasing the concentration of a liquid increases the amount ofparticles therefore there will be more successful collisions. Becauseof this, more sulphur will be produced.Overall, the higher the concentration, the more sulphur will beproduced. Therefore, the liquid will become opaque quicker.I predict that my graph will look like this (below) when I plot theRates of Reaction - The concentration of hydrochloric acid and the rate of reaction with sodium theosulphate GCSE Chemistry Coursework InvestigationRates of Reaction - The concentration of hydrochloric acid a nd the rate of reaction with sodium theosulphateIntroductionDuring a chemical reaction, particles collide with each other. Thiscollision causes certain bonds to break and new ones to be formed. Acertain amount of energy is needed to allow a reaction to take place.This is called the activation energy its the minimum quantity ofenergy that is required. There are certain factors that can affect therate of reaction. These are surface area, temperature, concentrationand catalysts.The surface area is a very big factor in the rate of reaction.Reactions only occur on the surface, because this is where thecollisions will occur. If a solid is broken into smaller pieces, thesurface area is increased. This leaves more area where the reactioncan take place, thus increasing the rate. If the reactant is in theform of one large solid, the reaction will take longer, thereforedecreasing the rate.The temperature is also a major factor. When the temperatureincreases, the particles consequently heat up. This causes the kineticenergy in them to increase, therefore they move around faster. Thismeans that the rate in which they collide with one another willincrease.By increasing the concentration of something, more particles areintroduced in the same volume. This would mean that the likelihood ofcollisions will increase. This would increase the rate of reaction. Onthe opposite angle, the lower the concentration, the less chance ofcollisions. Therefore the rate of reaction will decrease.Catalysts can be found in the form of transition metals. These speedup the rate of reaction. However, the catalysts themselves are notused up.AimOur aim is to see how the change in concentration of hydrochloric acidmight affect the rate at which it reacts with sodium theosulphate.PredictionWhen sodium theosulphate and hydrochloric acid react together, manyproducts are created.Na2 S2 O3 (aq) + 2HCl (aq) 2NaCl (aq) +H2O (l) + SO2 (aq) +S (s)The equation above shows all the products of the reaction betwe enhydrochloric acid and sodium theosulphate. The products are sodiumchloride (aqueous solution), water (liquid), sulphur dioxide (aqueoussolution) and sulphur (solid).The sulphur, being a solid, turns to liquid cloudy and opaque. Acertain amount of sodium is needed to turn the solution cloudy enoughto be opaque.Increasing the concentration of a liquid increases the amount ofparticles therefore there will be more successful collisions. Becauseof this, more sulphur will be produced.Overall, the higher the concentration, the more sulphur will beproduced. Therefore, the liquid will become opaque quicker.I predict that my graph will look like this (below) when I plot the