Rates of Reaction - Sodium Thiosulphate and Hydrochloric acid
In this piece of coursework, I will study how concentration affects the rate of reaction. I will do so by timing the reaction of Sodium
Thiosulphate with an acid. In this coursework, I will include background knowledge, prediction, safety, results, calculations, graphs, an analysis, conclusion and an evaluation. In my evaluation I will comment on how reliable my results were and how I could have improved my coursework in any possible way.
The definition of rate of reaction is ‘The speed at which a chemical reaction takes place’. The factors that affect the rate of reaction are: · Use of a catalyst
· Temperature
· Surface area
· Concentration
I will be investigating Concentration in this experiment. In a higher concentration there are more Sodium Thiosulphate particles. This means there is a higher number of collisions which will have enough energy to react. This causes the rate to increase. The time it takes for a change to take place can be measured and can be estimated. For a reaction to take place 2 reactants must collide and the collision must have enough energy.
Prediction
I predict that as the concentration of the Sodium Thiosulphate increases the rate of reaction will increase. This can be proved by relating to the collision theory. I predict that as concentration is increased the amount of time taken for the reaction is halved.
Safety Issues
There are many safety issues that need to be considered while doing this experiment. These include:
· Wearing safety goggles at all times. If acids or any other chemicals are spilt, they would cause serious damage to the skin and eyes.
· Ties and long hair should be kept away from the experiment.
· If an accident ...
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... my evidence of this experiment is reliable because I did it with precision and carried it out carefully. I thought that I might have some anomalies but there were not any. I can prove this by using my prediction earlier in the experiment. I said that “as concentration is increased the amount of time taken for the reaction is halved.” I would have been perfectly right but I made a mistake while measuring.
To improve my results, I would use a wider range of concentration and different acid solutions. This would help me to find a pattern and come to a firm conclusion.
Overall I think that this experiment was a success as I have proved that concentration does affect rate, and I have also found that when the concentration is doubled the rate of reaction is halved. To draw a firm conclusion I would need to get more results, less inaccuracies and better measuring methods.
The purpose of the experiment is to study the rate of reaction through varying of concentrations of a catalyst or temperatures with a constant pH, and through the data obtained the rate law, constants, and activation energies can be experimentally determined. The rate law determines how the speed of a reaction occurs thus allowing the study of the overall mechanism formation in reactions. In the general form of the rate law it is A + B C or r=k[A]x[B]y. The rate of reaction can be affected by the concentration such as A and B in the previous equation, order of reactions, and the rate constant with each species in an overall chemical reaction. As a result, the rate law must be determined experimentally. In general, in a multi-step reac...
Investigating How Changing the Concentration of Hydrochloric Acid Affects the Rate of Reaction with Sodium Thiosulphate Solution
The aim is to find out if changing the concentration of the hydrochloric acid solution has an effect on the time taken for the reaction. The reaction that will take place is: Hydrochloric acid + Calcium Carbonate + Calcium Chloride + Water + Carbon dioxide 2HCl (aq) + CaCo3 (s) CaCL2 (aq) + H2O + CO2 (g). Collision theory - Collisions between reactant particles are needed. for the reaction to take place in order to form a product.
We will set up a conical flask on top a cross. We will vary the
from 10cm to 50cm to make it easier to see the difference in a graph.
Investigating the Factors Influencing the Rate of Reaction Between Sodium Thiosulphate and Dilute Hydrochloric Acid
* Concentration - I will try my best to use all the acid from the
The Effect of Temperature on the Rate of Reaction of Sodium Thiosulphate and Hydrochloric Acid
Concentration's Effect on the Speed of Reaction Between Magnesium and Hydrochloric Acid Planning 1: The aim of this investigation is to find out the effect of acid concentration in the reaction between dilute hydrochloric acid and magnesium ribbon. The rate of a chemical reaction is a measure of how fast the reaction takes place. A high concentration of hydrochloric acid could mean a fast reaction whereas as a low concentration could mean a slow long reaction. I will be testing different concentrations of acid reacting with magnesium in two separate experiments, which will hopefully prove this initial prediction. [IMAGE][IMAGE] During my science lesson I have learnt the following information that has enabled me to plan my investigation.
Hcl. Under the conical flask I put a white piece of paper and put a
Rate of Reaction - Sodium Thiosulphate and Hydrochloric Acid. Aim Investigation, to find out how the rate of reaction between sodium thiosulphate and hydrochloric acid is affected by changing the concentration. Introduction I must produce a piece of coursework investigating the rate 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 development of a product during a chemical reaction. It is measured by dividing 1 by the time taken for the reaction to take place.
Effect of Temperature on the Rate of Reaction between Sodium Thiosulphate and Hydrochloric Acid Investigation Chemical reactions are used in our everyday life, they literally keep us alive. They are used in food, respiration and everywhere else in the environment. A chemical reaction mainly occurs when reactants react together to produce a new product. The speed at which this reaction takes place is called the rate of reaction. The product produced has a number of particles in the solution that has formed from the reactants.
Investigating Reaction Rates of Sodium Thiosulphate and Hydrochloric Acid Aim: To investigate the rate of reaction of Sodium Thiosulphate and Hydrochloric acid. In this investigation I will be varying the concentration of Sodium Thiosulphate only and not the Hydrochloric acid concentration. In this investigation I will use the following word equation: Sodium Thiosulphate + Hydrochloric acid In this investigation I will use the following symbol equation: Na2S2O3 + Hcl Prediction: I predict that as the Sodium Thiosulphate concentration increases the rate of reaction will also increase. The reason I predict this is because there will be a higher concentration of particles and so a faster reaction would be able to occur-
The Effect of Temperature on the Rate of Reaction Between Sodium Thiosulphate and Hydrochloric Acid
The aim of this investigation is to: 1) find the rate equation for the reaction between hydrogen peroxide, potassium iodide and sulphuric acid by using the iodine stop clock method and plotting graphs of 1/time against concentration for each variable. Then to find the activation energy by carrying out the experiment at different temperatures using constant amounts of each reactant and then by plotting a graph of in 1/t against I/T, 3) to deduce as much information about the mechanism as possible from the rate equation.