effect of conc. on rate

• What happens to the rate of chemical reactions over time?

  Reactions are rapid initially, slow down over time, and finally stop
• What is the key idea in chemistry that explains the shape of the reaction rate curve?

  Collision Theory
• According to collision theory, when can chemical reactions take place?

  When the reacting particles collide with sufficient energy
• What determines the rate of a chemical reaction?

  The frequency of successful collisions
• What does the term frequency refer to in the context of chemical reactions?

  The number of successful collisions per second
• How does the number of reactant molecules affect the rate of reaction over time?

  A large number of reactant molecules leads to more collisions per second, while fewer reactant molecules lead to fewer collisions
• What happens to the reaction when all reactant molecules have run out?

  The reaction stops because the number of collisions per second is zero
• In the experiment, what is assumed about the particles in the containers?

  The particles are dissolved in water
• How does the concentration of particles in a container affect the rate of reaction?

  A higher concentration leads to more collisions per second, increasing the rate of reaction
• What is the relationship between the rate of reaction and concentration?

  The rate is proportional to the concentration
• How does the principle of concentration apply to gases?

  A higher gas pressure corresponds to a higher concentration, affecting the rate of reaction
• What can be inferred from plotting the quantity of product for reactions with different concentrations?

  The reaction with higher concentration produces more product and has a steeper line
• What will be covered in the next video?

  A required practical investigating the effect of concentration on the rate of reaction