Wednesday 6th of June Period 1

Effect of particle size on rate of reaction

This experiment investigates which size of magnesium particles react faster with hydrochloric acid and measures how much hydrogen gas is given off.

To start this experiment 25ml of hydrochloric acid is measured into a round bottomed flask. During this experiment the flask is connected to a syringe which is connected to a position sensor. As more gas moves into the syringe the position sensor moves up making the syringe move upwards.

Two types of magnesium were reacted. The powder is weighed on the scales until it reaches 0.11g . Ribbon is measured at 11cm and then reacted. � 
The rate of reaction can be found. 

 rate = y2-y1/ x2-x1

Particle Size

Rate of Reaction

Powder

3.75mls-1

Ribbon

0.22mls-1

The top line of these results represent the magnesium powder and the bottom represents the magnesium ribbon. These results show that the powder is much faster than the ribbon.