This minimum amount of energy which reacting particles must possess to reaction is called the activation energy. This is done because it is a requirement for the experiment, which is to find the how the rate of reaction is affected with varied concentrations of the sodium thiosulphate. Matter interacts to form new substances through a process called a chemical reaction. The independent variables investigated in this experiment were the concentration of different substrates, the temperature of the environment, and the effect of a catalyst on the reaction rate. This will hopefully make the experiment more time efficient.
This increase is consistent with each. To solve this problem, I could repeat the experiment but this time I would use the same hydrochloric acid from the same bottle and the same sodium thiosulphate from the same bottle so it would provide an even more accurate reading, as the concentration of the liquids will be the same. The different concentrations of hydrochloric acid are 0. I will try and control these as far as possible, and be as accurate as I can when measuring out the chemicals. If so, whose assets, and why? This can cause reactions in the beakers and will lead to inaccuracies. Briefly describe your Preliminary Experiment and include your results.
The function of the enzyme is determined by the sequence of amino acids, types of amino acids, and the shape of the string. The problem with this is that it will make the experiment unfair. Matter interacts to form new substances through a process called a chemical reaction. Similarly the use of a catalyst complicates things, and if used incorrectly could alter the outcome of the experiment. From the results you can see that there is a directly proportional relationship between the concentration and the rate of reaction. Given that the rate constant is proportionally constant for an experiment, it changes with temperature.
So this means the particles will be moving around more and therefore they are more likely to collide with each other. After performing the calculations, strength of the prepared sodium thiosuplhate solution was found to be……. More readings may have given more accurate and reliable results, but would not have been very time efficient. In this investigation I will be varying the concentration of Sodium Thiosulphate only and not the Hydrochloric acid concentration. Introduction In the experiment the magnesium reacts with the hydrochloric acid to create magnesium chloride and hydrogen.
The reaction, which produces solid sulfur, will be followed by measuring the time needed for the reaction mixture to become opaque. Therefore, if we increase concentration, we increase the number of particles in the container and thus increase the chances of a successful reaction occurring. The sulphur formed however is insoluble and exist in the mixture as a white or pale yellow precipitate or a colloid that gives a milky appearance and makes the solution opaque. Then pour the finished substance into sodium carbonate because the reaction will start to smell after a while so this chemical will help prevent the bad smell. Anomalous Results: - There is but one example of an anomalous reading within my results. That was the one downside to the burette.
We are assuming that this is accurate. This is where the collision theory starts in gases, increase in pressure means those molecules are closer together so there are more collisions. This is how I plan to measure the rate of the reaction. Prediction: I predict that as the concentration of the Sodium Thiosulphate doubles, the rate of the reaction will double. Apparatus: · 100ml conical flask · Stopwatch · Thermometer · Different size measuring cylinders 5ml, 10ml, 50ml · Piece of paper. The stop watch could have been faulty — the button might not have been working well and may not have stopped the timer when I pressed it. Anti-bumping granules are small ceramic granules which have rough edges.
I will be using a range of concentrations from 10cm to 50cm to make it easier to see the difference in a graph. The Reaction Between Sodium Thiosulphate and Hydrochloric Acid The Effect on the concentration on the reaction between Sodium Thiosulphate and Hydrochloric acid Our aim in this investigation is to find out how the concentration of Sodium Thiosulphate affects the rate at which it reacts with Hydrochloric acid. Lower end of the jet. A chemical change is any change resulting in the formation of a new chemical substance s. This happens because more particles are being added to the solution when the concentration increases. So the rate of a reaction is defined as the rate of decrease in concentration of any one of the reactants or the rate of increase in concentration of any one of the product. From the above calculations it can be seen that at room temperature an increase of 10°C results in the rate of reaction roughly doubling.
We will do this by using a measuring cylinder and putting the cylinder on the work surface as we are checking to make sure we have the right amount. We timed how long it took for the solution to turn cloudy so that the cross could no longer be seen. The answer to such questions requires an understanding of chemical reaction rates. Then you add H2O to the other conelike flasks so that the entire volume in each flask in 50 cm? Also the experiment could have been jogged which would have stirred the solution around a little which would cause more successful collisions to occur and the rate of reaction to increase. This will make all the tests fair Page 2 and will make the experiment safer as we will not have to search for pieces of equipment during the experiment.