By doing this I could also see how long it takes for the marble chips to dissolve at different concentrations or temperature. I think that this is because at the beginning of the reaction you need energy to start the reaction and that is why this reaction is exothermic.
I thought the procedure was quite safe and easy to do, as it did not take a lot of time to set it up or stop it. A powder has the largest surface area and will have the fastest reaction rate. I can also see that the points at the beginning of line for the acid 0.
This is because the same mass of calcium carbonate will give the same mass of carbon dioxide. I got very smooth curves for mass loss on all 5 of the concentrations and they levelled of at different levels as I have expected, i.
Carbon dioxide does not have a very big atomic weight: Using different surface areas will not affect the final mass loss or gas volume collected. A solid in a solution can only react when particles collide with the surface of this solid, in this case calcium carbonate.
There are no points that lay a long way from the best-fit line as it goes through the origin.
I would also try different surface areas of the marble chips and investigate how this affects that rate of reaction at different concentrations. The only aspect that I was concerned about was that the mass loss in the first trials was lower than in the second trial.
Therefore there will be more collisions per second, so more particles reacting per second. This difference in the reactions can be illustrated by the following graph graph: However the rate of reaction decreases as the experiment progresses.
So therefore if we break the marble chips up into powder we get some sort of a catalyst for this reaction. The scatter around best fit of the graphs for mass loss is minimal and the curves seem to be very smooth.
Also the products of the reaction between the HCl and the marble chips gradually dilute the acid, especially as the water is produced, therefore the concentration of reactant molecules decreases and the rate of reaction goes down. In all my graphs the points seem to lie very close to the best-fit line, which shows that they are very near to accurate.
The curves of mass loss level of at different levels because the acid runs out at different times and at different amounts of mass loss, as the concentration goes down the mount of HCl molecules decreases and so less carbon dioxide can be produced as less successful collision can take place.
The bigger the area of the solid surface, the more particles can collide with it per second therefore the faster is the rate of the reaction between hydrochloric acid and marble chips. The only points that seem to be a bit out from the best fit lines are the ones for the 0.
However, at lower concentration less energy is produced and so it takes longer for the molecules to start reacting.Factors Affecting the Rate of a Reaction. Print This means that there is an inverse relationship between concentration and the rate of a reaction.
As the concentration of a substance is increased then the time for the reaction to take place is decreased. If you are the original writer of this essay and no longer wish to have the essay. To investigate the effects of change in concentration on the rate of reaction between Sodium Thiosulphate and Hydrochloric Acid.
Briefly describe your Preliminary Experiment and include your 7 pages 42 May/ /5(5). In this investigation I will be investigating to see whether the concentration affects the rate of a reaction.
effect of concentration on rate of reaction Essay relationship between. The Effect Of Substrate Concentration On The Activity Of The Enzyme Catalase A Level Biology Project Aims This is an experiment to examine how the concentration of the substrate hydrogen peroxide affects the rate of reaction of the enzyme catalase.
Read this essay on How Concentration Affects Rate of Reaction. Come browse our large digital warehouse of free sample essays. Get the knowledge you need in order to pass your classes and more. Only at mi-centre.com". What affects the rate of reaction? 1) The surface area of the magnesium.
2) - How concentration affects the rate of reaction Aim:To investigate how different concentrations of hydrochloric aci9d affect the rate of reaction on marble chip, (calcium carbonate).
Rates of Reaction Essay - Rates of Reaction What is a rate of reaction. The.Download