Investigate the effect of concentration on the rate of reaction.

Authors Avatar

Chemistry Coursework

I have been given the task for my coursework to investigate the effect of concentration on the rate of reaction.

Equipment

  • 10g marble chips (calcium carbonate)
  • Measuring cylinder
  • Conical flask
  • Delivery tube
  • Goggles
  • Bowl
  • Stop watch
  • Hydrochloric acid
  • Water

Method

I will have 10g of marble chips in a conical flask and then put in 50ml of hydrochloric acid first and I will observe the reaction. With a stopwatch I will record every 20 seconds up to 3 minutes, I will measure the volume of gas given off by reading of the measuring cylinder. The second experiment I will do the same but this time I will have 45ml of acid and 5ml of water each time marble chips will remain 10g):

The  rates of the chemical reactions can be speeded up by:

  • Temperature –if temperature increases the particles to move quicker therefore collide into each other
  • Concentration (pressure) – more concentrated means more particles of reactant knocking about between the water molecules.            
  • Catalyst –gives reactant a surface to stick on where they can bump into each other.
  • Size of particles (surface area) –reactants break  solid into smaller pieces and this gives particles more area to work on.  
Join now!

These four things increase the number of collisions making the reaction faster.

Fair test

In order for my experiment to be fair, I will

  • In each experiment the marble chips will be 10g
  • do each experiment twice to see if I go wrong in any experiment

Safe test

In order for my experiments to be fair, I will

  • WEAR GOGGLES! If acid squirted into eye or pupil cavity can cause major skin irritation or even burn eyes
  • When using acid, handle carefully because it is harmful when it comes into contact with skin.
  • ...

This is a preview of the whole essay