Student Essay on The Dissolving Process

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The Dissolving Process

Summary:   Details an experiment explaining the process of dissolving. Explores several variables that could affect the rate of dissolving.

Dissolving

Dissolving is when particles collide and break substances down, for example sugar, when particles gain heat they gain engery and collide with sugar particles, also i the concentration of the solvent is doubled it doubles the rate of the reaction. In that reactionthe solvent, the water, breaks the solute down, the sugar, after this happens the soluteand the solvent mix to become a solution.

There are several variables that could affect the rate of dissolving eg: Tempreture. If you raise the tempreture the particles gain energy and collide with the solute more, therefor increasing the chance of a succesful collision. If you increase the concentration of the solvent there are more particles to collide with the solute, therefor increasing the rate of the reaction by increasing the rate of succesful collisions.

For my investigation I have chosen to investigate the rate of a reaction when the tempreture is increased. I predict that as the tempreture rises the rate of the reaction will speed up, I think this because when particles are heated up they are given mor energy, this causes them to move faster and collide more, this increases the rate of reaction and the rate of succesful collisions.

First I will prepare my aparatus

Then I will prepare three beakers, by flling them all to 20 cm3

Then I will start my experiment by timing how the sugar cube takes to dissolve

I will do this three times to ensure I can get accurate results

I will do this experiment at 5 different tempreturs: Room tempreture, 40, 60, 80 and 100 degrees C

I will then record my results and work out the average for each tempreture.

The aparatus I will use are:

3 beakers

Sugar cubes

A tripod

A gauze

A bunsen burner

A stop watch

A themometer

As the tempreture rises the speed of the reaction speeds up, I know this by looking at my results on graph. This is because the particles gain more energy causing them to collide into the sugar cube more often, this means the more succesful collions the faster reactions.

My results are reliable because I repeated the experiment 3 times and all of the results are similar. I think that the experiment could be improved by finding away to find when the sugar has dissolved accurately. I think the anomylous results were caused by under or over heating of the water. Another way this experiment could be carried out is by raising the volume of the liquid in the beaker and heating them all at a set tempreture.