Get feedback on grammar, thiosulphate, gcse and logic instantly. The independent variable in the experiment is the initial concentrations of Sodium Thiosulphate and Hydrochloric Acid. These are circled on my graphs. After drawing a graph of logRate against logConcentration and using the calculations in my plan, the gradient of the line gave me a value of 0. However as only one variable can be changed I will keep one reactant constant whilst changing the other to get a fair set of results. If broken clear up all glass immediately.
The equation to this is as follows: In this investigation I will be varying the concentration of Sodium Thiosulphate thesis writing practice worksheets and not the Hydrochloric acid concentration. Hi, I am Sara from Studymoose Hi there, would you like to get such a paper? Instead of using the cross method I would use a light intensity machine that could measure the change in colour over a period of time and stop and start timing when it had reach a certain value. This means its is hard to control this factor which is affecting the rate of the reaction.
Background Research Chemical reactions are to do with changing the materials that form the base of your experiment. Improvements I could have used greater or a more systematic range of temperatures. In this reaction although 2HCl molecules are needed for the reaction to take place; however from the kinetics that I found HCl has no effect on the rate and is zero order.
This time add 25cm3 of Na2S2O3 into the bottom of the conical flask before recording the time taken for the cross to disappear again, for all the concentrations. In my investigation, there was the limitation of room temperature.
Heavier particles move more slowly than light ones at a given temperature. As concentrated Hydrochloric acid will be used make sure eye and hand protection is worn. These graphs show how if the time taken for the reaction to reach a specific concentration is too long it will not be a true reflection on the actual initial rate of the reaction. This is because the rate is determined by the rate of the slowest step of the mechanism, known as the rate determining step.
The independent variables in our experiment are the concentration of hydrochloric acid. It is often used as a chemical intermediate and in petroleum hydtochloric, food processing, pickling, and metal cleaning. Sorry, but copying text is forbidden on hydroch,oric website. I think this because there is outliers in the 2M set of data and the error bars overlap between 1M and 2M on my error bar graph.
On my ROR graph, there is a positive correlation. To reduce this error I would choose another method of measuring the rate.
The reaction gcse sodium reaction and HCL Length:. And supports my conclusion. Log In Sign Up. Papers] Free Essays words 5.
The Rate of a reaction can socium represented as: Sodium Thiosulphate in Hydrochloric Acid. Reactions that occur slowly have a low rate of reaction. I predict that as the Sodium Coursework sodium increases the rate of reaction will also increase Research Papers words 3. For example, rusting is a slow reaction; it has a low rate of reaction.
When the temperature increases the k constant will increase, this is because the molecules have more kinetic energy and there is a higher probability that they will collide and react. After drawing a graph of logRate against logConcentration and using the calculations in my plan, the gradient of the line gave me a value of 0.
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I would also consider using a wider range of concentrations so I can do in-depth analysis and I can compare the two acids. This causes a quicker reaction. Free Essays words 3.
The method I will be using is by seeing how long it takes for a black cross underneath the conical flask to disappear which will be the point in all the reactions where the concentration of the sulphur precipitate is equal and so will the rate can be fairly calculated.
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