Investigating The Rate Of Reaction Between Magnesium And .
I am going to measure the rate of reaction between magnesium and hydrochloric acid. In all I am going to do two experiments the first one will look at whether changing the concentration will effect the rate of reaction and the second experiment will look at whether changing the length of magnesium will alter the rate of reaction.
My first experiment will look at how the rate of reaction changes in different concentrations.
Aim .
My aim is to see how the rate of reaction between magnesium and hydrochloric acid is affected by altering the concentration. .
Hypothesis .
I predict that if the concentration is high then rate of reaction will be much more faster because if a solution is made more concentrated it means that there are more particles of reactant knocking about between the water molecules which makes collisions between the important particles more likely. .
My prediction is made clearer by the diagrams below which will show the particle theory. .
Apparatus.
o Measuring cylinders .
o Boiling tube.
o Ruler.
o Stop Watch.
o Magnesium ribbon.
o 2 molar hydrochloric acid .
o Water .
Plan.
First I will set up the experiment then I will put 30cm cubed of hydrochloric acid inside the boiling tube, no water will be added for the first part of the experiment. I will then put in a 1cm long piece of magnesium into the tube and I will start the stopwatch and I will see how long it takes the magnesium to react, before dissolving in the solution. .
The experiment will be repeated again on numerous occasions but the concentration will be changed. I will do this by adding 5cm cubed of water to the solution but at the same time I will decrease the amount of hydrochloric acid by 5cm cubed. For example the second time I do the experiment, I will have 25cm cubed of hydrochloric acid and 5cm cubed of water. The experiment will continue like this until there is no hydrochloric acid and 30cm cubed of water in the boiling tube.