4.18 Describe the effects of changes in surface area of a solid, concentration of solutions, pressure of gases, temperature and the use of a catalyst on the rate of a reaction

• The more concentrated, the faster the rate of reaction
• The larger the surface area, the faster the rate of reaction
• The higher the temperature, the faster the rate of reaction
• The higher the pressure, the faster the rate of reaction
• Use of a catalyst also increases the rate of reaction. The more there is of the catalyst, the faster the reaction.