Investigating the Rate of Reaction Between Magnesium Ribbon and Hydrochloric Acid

Investigating the Rate of Reaction Between Magnesium Ribbon and Hydrochloric Acid

Aim:

To find out the rate in which magnesium ribbon dissolves in different

molars of hydrochloric acid, and which factors affect the rate of

reaction.

Prediction:

The 'Collision Theory' says that particles can only react if they

collide with enough energy for the reaction to take place. As well as

the collision theory there are also other factors that will effect how

quickly and effectively the reactions take place.

The four factors that effect the rate of a chemical reaction are:

TEMPERATURE,

CONCENTRATION OF ACID,

SURFACE AREA OF THE REACTANT

and USE OF A CATALYST.

Temperature

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The higher the temperature of the solution, the faster the rate of

reaction, and vice versa. This is because as the solution heats up the

particles gain energy and begin to move faster and with more energy.

This causes more successful collisions per minute and consequently a

faster rate of reaction.

We carried out an experiment in lesson, which involved placing marble

pieces in hydrochloric acid. We altered the temperature of the acid

and recorded the speed in which the marble dissolved in the different

temperatures.

After repeating the experiment several times, we found that the higher

the temperature of the acid the faster the marble reacted and

consequently dissolved. This is, as I said above, because the acid

particles have more energy to move around and they collide with more

energy, increasing the rate of reaction.

HOT = FAST COLD = SLOW

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Concentration

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The concentration of the acid will effect the rate of reaction. This

is because there are more particles of acid to collide with the metal