rates of reaction

• The faster you make chemicals in the chemical industry, the faster you make money
• The rate of reaction is how fast the reactants are changed into products
• What is rate of reaction?

  The speed at which a chemical reaction takes place
• Name one of the slowest reactions

  Rusting of iron
• Slow reactions include chemical weathering
• Give an example of chemical weathering

  acid rain damage to limestone buildings
• Give an example of a moderate speed reaction

  metal magnesium reacting with an acid to produce gentle bubbles
• Name two very fast reactions

  burning

  explosions
• Explosions release a lot of gas
• The steeper the line on a graph, the faster the rate of reaction
• When the reactants become used up, the line on a graph becomes less steep (it plateaus)
• Particles must collide with enough ____ in order to react. Fill the blank.

  energy
• What does rate of reaction depend on? (in terms of collision theory)

  collision frequency

  energy transferred during a collision
• What factors affect rate of reaction?

  Temperature

  Concentration of solution or pressure of gas

  surface area

  presence of catalyst
• All factors affecting rate of reaction increase particle collisions
• Increasing temperature will make particles move...

  faster
• When particles move faster they will collide...

  more
• A higher concentration means a higher number of...

  particles
• When pressure is increased particles occupy a smaller space.
• Breaking up a solid into smaller pieces will increase it's..

  surface area to volume ratio
• What's a catalyst?

  A substance that increases the rate of a chemical reaction without being consumed in the process.
• Catalysts aren't apart of the overall reaction equation
• Catalysts decrease what?

  activation energy
• Give an example of a biological catalyst

  enzymes
• What is meant by a biological catalyst

  they catalyse reactions in living things
• rate of reaction=

  amount of reactant used or amount of product formed/time