How the concentration of acid affects the rate of reaction with marble chips

1. Factors affecting the rate of reaction Rates of Reaction John West Rutherford College

2. Collision theory Before particles can react they must collide Particles in a gas or liquid are in constant motion. Chemists deal with atoms molecules and ions. Chemical reactions happen when particles collide. Not all collisions are effective. Particles might not collide with enough energy. They might not collide at the right angle Solids Solid substances don’t usually react with each other because their particles are locked together. Only those particles on the surface of the solid are available for collision John West Rutherford College

3. What do we mean by the rate of a chemical reaction? The rate of a chemical reaction is how fast reactants are converted into products. We can design experiments to measure how fast reactions occur The rate of a reaction can be speeded up or slowed down depending on the reaction conditions. Increasing the number of collisions and increasing their effectiveness will speed up the rate of a chemical reaction John West Rutherford College

4. Marble chips and 2.0 molL-1 hydrochloric acid John West Rutherford College

5. Marble chips and 2.0 molL-1 hydrochloric acid John West Rutherford College

6. Comparing the rate of reaction with two different concentrations John West Rutherford College

7. Graphing results John West Rutherford College