Rate of reaction DOES NOT depend on

The correct answer is Pressure.

Key Points

• The rate of a chemical reaction generally depends on several factors including concentration, temperature, and the presence of a catalyst.
• Pressure can influence the rate of reaction in cases where gases are involved, but it is not a general factor for all reactions.
• In reactions involving only solids or liquids, pressure typically has little to no effect on the rate of reaction.
• Key factors such as concentration, temperature, and catalysts directly affect the speed at which reactants are converted to products.

Additional Information

• Concentration
  • The rate of reaction generally increases with the concentration of reactants because there are more particles available to collide and react.
  • According to the collision theory, the frequency of effective collisions increases with concentration.
• Temperature
  • Raising the temperature typically increases the rate of reaction as particles move faster and collide more energetically.
  • Higher temperatures provide the energy needed to overcome activation energy barriers.
• Catalyst
  • Catalysts speed up reactions without being consumed by lowering the activation energy required for the reaction to proceed.
  • Enzymes are biological catalysts that play crucial roles in speeding up biochemical reactions.
• Activation Energy
  • Activation energy is the minimum energy that reacting particles need to collide successfully and start a reaction.
  • Lowering the activation energy increases the rate of reaction.