Gcse chemistry coursework rates reaction sodium thiosulphate hydrochloric acid

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Gcse chemistry coursework rates reaction sodium thiosulphate hydrochloric acid

In addition I am also checking how different variables affect my experiment and also how I can make my test more precise, reliable and accurate. Strategy According to my results, as the concentration of STS solution increased the rate of reaction of my Gcse chemistry coursework rates reaction sodium thiosulphate hydrochloric acid was increased.

Chemistry Gcse Coursework Rates of Reaction - New York Essays

Also as the concentration of STS solution decreased, the time of reaction increased. The preliminary test checked if the experiment actually worked and the things I used were reliable for me to use.

The method I used to carry out my experiment was very reliable. I first picked the type of experiment I was going to do. Which consisted of many types or variables such as: As I had limited time I picked concentration.

GCSE CHEMISTRY RATES OF REACTION COURSEWORK | Anjelina Qureshi - iridis-photo-restoration.com Tripod Method Firstly I will draw a small dark cross on a piece of paper and place it on a bench mat.
Popular Topics These reactions only happen if the reacting molecules collide properly. The rate of reaction is the speed of a reaction.
A few health and safety ideas on risk assessment AIM for a high investigation-project mark - you have nothing to lose for your assessment!

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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. However in the 2 molar STS solution the rate of reaction was quick.

Therefore allowing me to create an accurate test and allowing me to obtain precise results. Once I decided the concentration I then carried out my experiment. In my experiment I applied H20 so that I could see the rate of reaction through a more dilute solution.

I applied all of these solutions in to a conical flask. I recorded my results using a timer just to see if the experiment worked. What I predicted in my preliminary test was, as the sodium-thiosulphate concentration increased, the time taken for the solution to turn cloudy took longer.

In this experiment I knew when the solution was completely cloudy was until the black cross underneath the flask had disappeared to my sight.

Sodium-thiosulphate — used as solution as part of my experiment Hydrochloric Acid — used as solution as part of my experiment Beaker — used for carrying the solution Measuring cylinder — used for measuring the volume of solution Timer — used to measure the time taken for the solution to get cloudy Calculator — used to calculate the average time Conical Flask — used to carry out the experiment Black-cross card- used to see weather or not the solution had turned fully cloudy.

Collecting Data In my experiment most of the variables I had were: The variable I changed was the volume of STS and the volume of water. The variable that I kept the same was the hydrochloric acid which remained at 30ml throughout the whole experiment.

By doing so it made my experiment a fair test as I was controlling other variables such as HCL. I kept the other variables the same in order to allow my experiment to be a fair test.

Preliminary work

Taking temperature into consideration if I did not control this my results would be inaccurate. My experiment was carried out very safely.

I made sure that I was wearing my safety goggles whilst I carried out my test. My experiment was placed not in the way of people so that my experiment is not any risk to me or them. In addition the safety rules made my experiment a fair test. To make sure that my test went accurately and precisely I made sure that my timing was accurately done not pressing the timer too early or late.

This again shows that my test was a fair test. As the range of volumes of STS I had consisted between 12ml to 40ml although if I applied higher concentrations the test would have been more reliable. I repeated these volumes three times and as a result no outliers had become visible to me on my data.

This suggested that my experiment was carried out very accurately. As well as in my preliminary test I also repeated the test three times so that I could see the results were accurate and precise.

Similarly my real experiment was done very precisely such as calculating or measuring the results or measuring the amount of solution in each beaker etc. I predicted that I would find a wrong result whilst doing my experiment, however my prediction was wrong and the results were very accurate.

If by chance I found an outlier I would not count it with the rest of my results and I would repeat that test again. One of my problems I encountered during my experiment was the time taken to press the timer which in my opinion affected my results. Interpreting Data What I notice in my results was that as the concentration of STS kept on increasing the time take for the solution to get cloudy was decreasing.

For example when there was 12ml of STS the average time was seconds.

Introduction

Where as when the STS was at 40ml the average time was 32 seconds which shows a very big relationship between the amount of STS and the time taken. This was due to the concentration of the STS solution. In comparison to my preliminary results I can see some similarities between the concentration types of the STS solution.

Also I can see on my graph the scatter of results look very accurate and the natural trend of my results shows a negative correlation.Chemistry Gcse Coursework Rates of Reaction. Science Coursework-Rates of Reactions Introduction Investigating how the concentration of sodium-thiosulphate (STS) and hydrochloric acid (HCL) affects the rate of reaction in the experiment.

In addition I am also checking how different variables affect my experiment and also how I can make my test more precise, reliable and accurate. - Rates of Reaction Aim I will be investigating the rate of reaction (how quick a reaction takes) of Sodium Thiosulphate (Na2S2O3) and Hydrochloric Acid (HCl {aq}).

There are different variables that can affect the rate of reaction. A BRAINSTORM on "Rates of Reaction" for chemistry coursework investigations-projects.

GCSE CHEMISTRY RATES OF REACTION COURSEWORK | Anjelina Qureshi - iridis-photo-restoration.com

(can tricky at GCSE level). The sodium thiosulphate-hydrochloric acid reaction, you can investigate the effects of temperature and concentration. GCSE Chemistry - Sodium Thiosulphate Coursework We must produce a piece of coursework investigating the rates of reaction, and the effect different changes have on them.

The rate of reaction is the rate of loss of a reactant or the rate of formation of a product during a chemical reaction. Disappearing X Experiment.

Gcse chemistry coursework rates reaction sodium thiosulphate hydrochloric acid

Introduction. I am going to investigate the rate of reaction between sodium thiosulphate (thio) and hydrochloric acid. Hydrochloric Acid + Sodium Thiosulphate "" sodium chloride + water + sulphur/5(8).

- The Rate Of A Reaction Between Hydrochloric Acid And Sodium Thiosulphate Aim: I am going to investigate the effect of changing the concentration of Sodium Thiosulphate on the rate of the reaction between Hydrochloric Acid and Sodium Thiosulphate.

Chemistry Gcse Coursework Rates of Reaction - Sample Essays