Rate of Reaction

• What is the rate of reaction?

  The change in concentration of reactants or products per unit of time
• What does a steep slope on a concentration vs. time graph indicate about the rate of reaction?

  The reaction rate is fast
• What effect does increasing temperature have on the rate of reaction?

  It increases the rate of reaction
• Which of the following factors can increase the rate of reaction?

  Increasing surface area of reactants
• How does increasing the concentration of reactants affect the rate of reaction?

  It increases the rate of reaction
• In a reaction between a solid and a liquid, how can you increase the rate of reaction?

  Increase the concentration of the liquid
• What is the effect of using a catalyst in a reaction?

  It increases the rate of reaction without being consumed
• In a reaction where gas is produced, how can you measure the rate of reaction?

  By measuring the change in volume of gas produced
• What is meant by the term “activation energy” in a reaction?

  The energy required to start a reaction
• surface area


  if we increase the ____ ____ of an object, the rate of reaction will speed up
• heat (up)


  if we ___ an object, the rate of reaction will speed up

  
• concentration


  if we increase the ____ of a solution, the rate of reaction will speed up
• catalyst


  if we add a ____ to a solution or object, the rate of reaction will speed up

  
• same volume


  a more concentrated solution has more particles in the ____ ____ of solution
• successful collisions per second

  if there are more particles in the same volume of solution, there will be more ____ ____ __ ____
• pressure


  if we increase the ____ of a gas, the rate of reaction will speed up

  
• gas molecules


  when increasing the pressure of a gas, we are basically squeezing the ___ ___ closer together
• steeper


  when analysing rates of reaction graphs, a _____ graph shows a faster reaction speed
• faster

  usually, reactions are ____ at the beginning because this is when the concentration of particles is very high
• time taken


  the equation for rate of reaction is- change in concentration divided by the ___ ___
• seconds


  what is the unit that time is always measured in?

  
• activation energy


  the minimum amount of energy required to start a chemical reaction
• anomalous


  when we plot a graph, if one single point does not fit in with the general trend, we deem this to be ____
• successful collision


  when particles collide with enough energy (activation energy) to react.
• Increasing temperature


  speeds up the rate of reaction as particles collide with more energy and move more faster so there are more successful collisions in a given unit of time.
• increasing surface are...

  speeds up the rate of reaction as there are more collisions in a given unit of time so therefore more successful collisions.
• Increasing concentration / pressure...

  speeds up the rate of reaction as there are more collisions in a given unit of time so therefore more successful collisions.
• speed up (a) reaction

  in general, adding a catalyst will ___ ___ a ___
• alternative route


  a catalyst provides an ____ ___ for a chemical reaction
• more energy


  a catalyst means that more particles will have ___ ____ to react, upon collision
• manganese dioxide


  in the decomposition of hydrogen peroxide, the catalyst used is called ____ ____
• black powder

  manganese dioxide comes in the form of a ___ ___
• water (and) oxygen


  the decomposition of hydrogen peroxide produces 2 products, which are ____ and ____