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 ... ... middle of paper ... ... 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.
How am I going to make it a fair test I will use a clean flask for
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-
· Rinse out mixture in flask and leave water running to get rid of the
Experimental: The experimental procedure outlined in the OU Physical Chemistry Laboratory Manual was followed without any deviations.
Investigation of How Temperature Affects the Rate of Reaction of Sodium Thiosulphate and Hydrochloric Acid
Investigating the Factors Influencing the Rate of Reaction Between Sodium Thiosulphate and Dilute Hydrochloric Acid
The Effect of Temperature on the Rate of Reaction Between Sodium Thiosulphate and Hydrochloric Acid
Hcl. Under the conical flask I put a white piece of paper and put a
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 How Changing the Concentration of Hydrochloric Acid Affects the Rate of Reaction with Sodium Thiosulphate Solution
from 10cm to 50cm to make it easier to see the difference in a graph.
We will set up a conical flask on top a cross. We will vary the
The Effect of Temperature on the Rate of Reaction of Sodium Thiosulphate and Hydrochloric Acid
* Concentration - I will try my best to use all the acid from the
The time taken for this to happen is the measure of the rate of reaction. We must do this several times, and change the concentration of sodium thiosulphate. The rate of reaction is a measure of the change, which happens during a reaction in a single unit of time. The things that affect the rate of reaction are as follows. Surface area of the reactants Concentration of the reactants