Find out if heating the hydrochloric acid affects the rate of reaction between magnesium and hydrochloric acid.

Scientific theory:

In a chemical reaction no mass is lost, when the reactants turn in to the product of the reaction, chemical reactions involve a permanent change not just a temporary one.

For this to happen their hast to be a change in energy as reactions always give out or take in energy most of the time this is heat energy this means the temperature in a reaction will go up or down.

Visible changes can occur in the reaction mixture. These show that a reaction has taken place, for example a gad is given off or a solid is made or the colour changes.

 

Oxidation this happens with most substances usually forming an oxide e.g. magnesium if not kept in a solution then it will react with oxygen forming magnesium oxide.

Exothermic (give out heat) the reaction supplies the energy as heat. The heat energy is given to the surroundings; the temperature might go up making it feel hot.

Temperature by changing the temperature in a experiment you are effecting the rate of reaction by heating it you are making the experiment go faster because you are making the particles react faster giving a higher chance of a collision happing and if you drop you are causing the particles to move slower so their isn’t as high risk of a collision happing.

Results table:

Diagram:  

Graph:

See graph paper.

What went wrong:

This experiment isn’t perfect; there is many different ways that this experiment can be altered.

You can change the temp which makes the particles move faster which will make more collisions happen because there is more particles flying about the place and then let the reaction happen then and see if it speeds up the reaction, and the amount of gas produced.

As when you take your magnesium strips and you clean then you are taking all the oxide of them so if you clean it and then put it down it will react again so if you don’t clean the magnesium until your about to put in to the acid the reaction will happen better.

When putting the Magnesium strip into the beaker of acid, gas can escape before the bung is on, so you could tie the magnesium on to a string and place the bung on so the string is held in place and then shake it so the strip will fall out in to the magnesium.

Also you can change the amount of acid being put in as the more acid you put in the more likely there is going to be a collision to make a reaction.

And buy making the pieces of magnesium smaller and putting in smaller pieces there is more surface area so their will be more reactions happing.

Evaluation:

Over all I think that the experiment wasn’t fair as their was many different ways that the experiment didn’t work and the results were different due to the problems their was, e.g. gas escaping.