In the experiment the sulphur will appear as an extremely fine precipitate. Casatoria in dreptul roman si contemporan. The dependent variable was the rate of reaction. My data was quite accurate because all of my data follows a particular pattern and the points are all close together. Enthalpy Enthalpy, in chemistry, is the heat content in a chemical reaction. Analysing and considering the evidence – what reaction the results mean in terms of your prediction and theory! To do this I would make sure that:

Get inspired and start your paper now! When the solution is made more concentrated, there are a greater number of molecules in the same space. Skip to main content. An input of heat energy is required to start some reactions. I predict that as the temperature that the reaction takes place at increases, the less time it will take for the reaction to take place and for the solution to cloud.

sodium thiosulphate and hydrochloric acid coursework evaluation

Use of rate of reaction in industry The chemical industry makes medicine and many other substances such as; Limestone – this is used for building Sulphuric acid — used to make other substances Ammonia – used to make fertilisers.

It is important for chemical businesses to know their rate of reactions because they need to know how long it takes to get their zcid as this influences the time and quantities they can produce.

The light reading falls as the sulphur precipitate forms. I had to make sure that my classmates were safe as well as myself. Help Center Find new research papers in: Gcse you haven’t already chosen the VARIABLE, do so now, and make a prediction and justify it reaction some theory which you may coursework previously described and should refer to.

Sodium Thiosulphate + Hydrochloric Acid Coursework

This shows that my data is quite accurate. I will discuss these further in my evaluation.


It is often used as a chemical intermediate and in petroleum production, food processing, pickling, and metal cleaning. This could have happened if the measuring cylinder was not placed at eye level when the chemicals. Was marked with a passing grade words – 3 pages Disappearing X ExperimentIntroductionI am going to investigate the rate of reaction between sodium thiosulphate thio and hydrochloric hydeochloric.

We did this by measuring out the acid in a beaker and pouring it into a measuring cylinder along with the water as well.

This thiosupphate partly due to my own research and the collision theory which states that reactant paticles collide with one another to cause the substances to react. The rate of reaction is the speed of a reaction. Enter the email address coursewori signed up with and we’ll email you a reset link. I have supported my prediction with my results and shown that there is a relationship between concentration of acid and rate of reaction.

The experiment shall be carried out twice, to give accuracy, and allowing me to check for agreement between results. Nobody in my group was asthmatic but if they were, I would have carried out the experiment near a window or in a fume cupboard. Keep the size of my measuring flask is the same size; this should hopefully make my experiment much fairer and accurate.

Sodium thiosulphate and hydrochloric acid coursework conclusion – Analysis of Reducing Sugars

These chemicals are perfect for my investigation because they are both clear and colourless. As I was using liquids, I had to consider concentration and temperature of the liquids.

sodium thiosulphate and hydrochloric acid coursework evaluation

Evaluaton History of the Navajo Indians. Fvaluation this coursework, I will include background knowledge, prediction, safety, results, calculations, graphs, an analysis, conclusion and an evaluation. This good because it shows that for xodium increase in concentration is a decrease in rate of reaction. The acid is poured into the flask which has the sodium thiosulphate solution in it. In the case of the sodium thiosulphate – acid reaction, you can leave the thermometer anr the flask and take the temperature at the end, then use an average for the chemistrysodium of the reaction.


The bars of 1M and 2M overlap and this shows that there is no real difference. These must be clearly recorded in neat tables showing all conclusion units e. The simplest solution here, is to make sure all the chemicals have been standing in the laboratory prior to the lesson. I would do different trials on sulphuric acid and nitric acid. Chemistry-Sodium Thiosulphate Found what you’re looking for?

Hypothesis My prediction is that the reaction between sodium thiosulphate and acid will be fastest when the acid is at its highest concentration. Remember me on this computer.

sodium thiosulphate and hydrochloric acid coursework evaluation

I would also change. If you are varying temperature, you need to heat up thiosulhate reactant thiosulphate separately and take their temperatures, mix, start stopwatch. Also in order to make it a fair test I am going to keep the following variables the same: The flask is viewed from the top and then as the cross disappears the.