Small 97 ml ml ml ml mlMedium 70 ml ml ml ml mlLarge All the atoms in a water molecule have a full outer shell, so they. I would also consider using a wider range of concentrations so I can do in-depth analysis and I can compare the two acids. These chemicals are perfect for my investigation because they are both clear and colourless. Briefly explain how the method can be used to measure the speed – the results of the first few minutes is usually the most crucial – you can discuss briefly other methods, but perhaps better in evaluation as a means of further evidence. For different the acid concentrations you can do a 2 nd and more thiosulphate graphical analysis of the limestone results. The rate of a reaction is a measure of change that happens in a single unit of time.

I consider my results to be as accurate as possible, as each experiment was done 4 times and an average taken form the 4 results. I carried out my method with no problems at all, and received no anomalous results. Based on this theory, one can predict that the rate of reaction will decrease as the concentration of the Hydrochloric Acid decreases as well. I measured the gas produced from the reaction every minute for five minutes. Enzymes powerpoint presentation helper biotechnology rates chemistrysodium, temperature and pH effects, lock-key mechanism Ammonia synthesis applying rates and equilibrium factors Uses gcse catalysts in. Get inspired and start your paper now!

sodium thiosulphate and hydrochloric acid coursework evaluation

I have used reliable resources to research this information and it all confirms my conclusion. Remember me on this computer. The simplest solution here, is to make sure all the chemicals have been standing in the laboratory prior to the lesson. PlanningWhat I going to investigate is how different factors affect the rate of the chemical reaction of Sodium Thiosulphate and Hydrochloric acid. In my evaluation I will comment on courseworj reliable my results were and how.


The purpose of this investigation is to record the amount of time taken for a reaction to occur when sodium hydrocgloric is mixed with hydrochloric acid. As soon as the chemicals were in, I started the timer. The hydrocnloric is poured into the flask which has the sodium thiosulphate solution in it.

Sodium Thiosulphate + Hydrochloric Acid Coursework – GCSE Science – Marked by

Reactions that occur slowly have a low rate of reaction. Help Center Find new research papers in: There are a few outliers in my results. I am going to investigate how sodiumm concentration of the acid effects the speed of the reaction. This could have happened because of calculation errors, human errors, recording errors or a fault with the equipment that we used. For latest updates see https:. Background Research Chemical reactions are to do with changing the materials that form the base of your experiment.

To do this we added water to the acid and did the experiment again 4 times, decreasing the concentration of the acid by 5cm3 each time. This energy gives the reactant particles enough energy to collide with enough force to break apart the bonds so that new products can be made from atoms. The enthalpy change is the amount of heat absorbed or released when a chemical reaction occurs at a constant pressure. The energy’s purpose is to allow the element to break its current bonds and form new ones.

When the solution is made more concentrated, there are a greater number of molecules in thlosulphate same space.


As I was using liquids, I had to consider concentration and temperature of the liquids. Conclusion In my investigation, my data and my graphs proved that my hypothesis was correct.

The results for 1, 2 and 4M keep showing outliers. It’s all about chance!

Investigating the rate of reaction between sodium thiosulphate and hydrochloric acid

This is very important because loose hair can not only get dipped into chemicals but can also obscure vision. As I was using liquids, I had to consider concentration and temperature of the liquids. Planning – thiosulphate theory and your experiment design! 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.

sodium thiosulphate and hydrochloric acid coursework evaluation

For example, rusting is a slow hydrochlorci it has a low rate of reaction. I would also change. Introduction Evaluating – and how good are your results then?

An investigation of the affect of the concentration an of the rate of reaction. The flask is placed on the X board.

Rate of Reaction – Sodium Thiosulphate and Hydrochloric Acid Coursework

These were my results: Include ‘health and safety’ points. This investigation interrogates affect of concentration and temperature on a reaction. VariablesI changed the concentration of the hydrochloric acid by adding water to it.