A few health and safety ideas on risk assessment AIM for a high investigation-project mark - you have nothing to lose for your assessment! Decomposing hydrogen peroxide with a solid catalyst or soluble transition metal compound.
These reactions only happen if the reacting molecules collide properly. The rate of reaction is the speed of a reaction. When the solution is made more concentrated, there are a greater number of molecules in the same space.
This increases the likelihood of reactants colliding properly and so increases the rate of the chemical reaction. Aim My aim is to investigate how changing the concentration of reactants can change the rate of reaction between hydrochloric acid and sodium thiosulphate.
I will be timing and watching: Hypothesis My prediction is that the reaction between sodium thiosulphate and acid will be fastest when the acid is at its highest concentration. This is because there will be more acid molecules in the same amount of solution, therefore more effective collisions with the sodium thiosulphate, and the rate will be higher.
This is because when there are more molecules in the solution, there are more molecules to collide so this will speed up the reaction, and therefore it is more likely they will collide with each other. This causes a quicker reaction. Background Research Chemical reactions are to do with changing the materials that form the base of your experiment.
This is the reaction I will be considering: Sodium thiosulphate is a colourless, crystal like compound and is used for dyes and is also a salt.
Hydrochloric acid is colourless, poisonous and highly acidic. It is often used as a chemical intermediate and in petroleum production, food processing, pickling, and metal cleaning. It can also be found in the stomach. These chemicals are perfect for my investigation because they are both clear and colourless.
This is good because I will instantly be able to see any change in the solution. The state symbol for sulphur dioxide is aq not g because it is dissolved in water as its original state would be too toxic and corrosive for me to use safely.
I am investigating the different factors which may speed up chemical reactions. This can be done by: Rates of reaction vary depending on which chemicals are being used and the activation energy required. Reactions that occur slowly have a low rate of reaction.
Reactions that happen quickly have a high rate of reaction. For example, rusting is a slow reaction; it has a low rate of reaction. Burning and explosions are very fast reactions: Activation energy Activation energy is the energy required to break the bonds of the reactants, so that new bonds can form to make the products.
An input of heat energy is required to start some reactions.Science Coursework: Rate of Reaction The Aim of the experiment: In this experiment I will investigate the relationship between the concentration of the hydrochloric acid and the rate of a reaction.
To find this out I will react different concentration of hydrochloric acid and magnesium, from there I will monitor the gas (hydrogen) produced and analyse the results.
sodium thiosulphate solution and dilute hydrochloric acid. These react according to the equations below: sodium thiosulphate + hydrochloric acid sodium chloride + water + sulphur dioxide + sulphur Na2S2O3(aq) + 2HCl(aq) 2NaCl(aq) + H2O(l) + SO2(g) + S(s) Your teacher will demonstrate a simple way to measure the rate of this reaction.
3 cm of magnesium ribbon typically has a mass of g and yields 40 cm 3 of hydrogen when reacted with excess acid. 50 cm 3 of 1M hydrochloric acid is a six-fold excess of acid. In this reaction, the magnesium and acid are gradually used up.
GCSE COURSEWORK. CHEMISTRY. AIM. In the experiment we use hydrochloric acid which reacts with the magnesium to form magnesium chloride/5(2).
Essays- For this investigation I am reacting magnesium ribbon Mg. For this investigation I am reacting magnesium ribbon Mg with Hydrochloric acid HCl I am measuring the rate of reaction between the two, and to do this am measuring the hydrogen given off by the reaction.
Jul 02, · A grade GCSE chemistry coursework, Rates of reaction, Decomposition of sodium thiosulphate, introduction, method, safety, results, discussion. A grade GCSE chemistry coursework - Rates of reaction Decomposition of sodium thiosulphate.
Updated on November 17, Luno more. The initial volume of hydrochloric acid. The initial Reviews: