I did, however find some outliers in my results. I had to make sure that my classmates were safe as well as myself. Keep the size of my measuring flask is the same size; this should hopefully make my experiment much fairer and accurate.
My data was precise because most of the points on my graphs are close to the line and are all close by each other. The conical flask and all other equipment must be clean as any impurities may contaminate my experiment.
In my investigation, there was the limitation of room temperature. My experiment was carried out very safely. I also had to choose which type concentration I needed either 1 molar or 2 molars concentration types. I realised that picking the 1 molar STS solution the rate of reaction was very slow.
I will keep everything constant apart from the variable I am changing-temperature. Therefore, I will make sure that I only change the temperature of the reaction mixture and keep the volume and concentration of the sodium thiosulphate, the volume and concentration of hydrochloric acid and the pressure of all the mixtures the same.
On each experiment I will take three readings and work out an average from the data I have obtained. This shows that my data is quite accurate.
A BRAINSTORM outline of a whole investigation is outlined below, it is not meant to be prescriptive, but can form the basis of aiming for a high mark and hopefully give you plenty of ideas. This is very important because loose hair can not only get dipped into chemicals but can also obscure vision.
The method I used to carry out my experiment was very reliable. I am investigating the different factors which may speed up chemical reactions. This would make my investigation more of a fair test because during my experiment I used a stronger concentration of the STS solution and so it would have been better if I used the stronger HCL solution.
For every one M increase, the rate for reaction increases by 2. In addition to this, more particles have activation energy. The picture bellow suggests that if the concentration increases the collision rate increases. Therefore this applies to the accuracy of the test.
Reactions that occur slowly have a low rate of reaction. Therefore this applies to the accuracy of the test. The bars for 3M, 4m and 5M do not overlap.
In addition to this, more particles have activation energy. One of my problems I encountered during my experiment was the time taken to press the timer which in my opinion affected my results.
I repeated these volumes three times and as a result no outliers had become visible to me on my data. This again shows that my test was a fair test. This means more of the particles collide and more of the collisions result in a reaction, so the rate of reaction increases.
I made sure that I had everything before I started.
I made sure that I was wearing my safety goggles whilst I carried out my test. Using white paper helped the marking to stand out. Rates of reaction vary depending on which chemicals are being used and the activation energy required.GCSE Chemistry Coursework: Investigating the rate of a reaction Your task is to plan, and carry out, an experiment to discover how to change the rate the reaction between sodium thiosulphate solution and dilute hydrochloric acid.
GCSE CHEMISTRY RATES OF REACTION COURSEWORK. 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: How quickly the reactants are used up How quickly a product is formed The rate of reaction (ROR) describes how.
Chemistry Rates of Reaction Coursework: Sodium thiosulphate and hydrochloric acid Simple Procedure Place a conical flask on a piece of paper with a cross on it. Add hydrochloric acid and sodium thiosulphate, and record the amount of time taken for the cross to disappear through the solution from the top of the flask.
GCSE CHEMISTRY RATES OF REACTION COURSEWORK. 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: How quickly the reactants are used up How quickly a product is formed The rate of reaction. Rates of reaction GCSE COURSEWORK CHEMISTRY AIM In the experiment we use hydrochloric acid which reacts with the magnesium to form magnesium chloride.
The effects of change in concentration on the rate of reaction between Sodium Thiosulphate and Hydrochloric Acid. x1 thermometer x2 measuring cylinders x1 /5(3). GCSE Chemistry Coursework: Investigating the rate of a reaction Your task is to plan, and carry out, an experiment to discover how to change the rate the reaction between sodium thiosulphate solution and dilute hydrochloric acid.Download