Rates of reaction

• What does the rate of chemical reactions refer to?

  The speed of reactants turning into products
• How can we measure the rate of a chemical reaction?

  By measuring reactants used or products formed
• What is an example of a slow reaction?

  Rusting of iron
• What is an example of a fast reaction?

  Explosions like fireworks
• What is the equation for the rate of reaction using reactants?

  Rate = quantity of reactants used / time
• What is the equation for the rate of reaction using products?

  Rate = quantity of products formed / time
• What units can be used to measure quantities in the rate of reaction?

  Grams or cm
• What do the calculated rates of reaction represent?

  The average rates throughout the entire reaction
• How does the rate of reaction change over time?

  • Starts fast with many reactants
  • Slows down as reactants are used up
• What does a graph of mass of reactant remaining show over time?

  Mass decreases rapidly then slows down
• What does a graph of volume of product produced show over time?

  Volume increases quickly then levels off
• What other units can be used for measuring rates of reaction?

  Moles or dm³ per second
• What will the next video cover regarding the rate of reaction?

  • Calculating the rate at a specific time
• Why is it important to convert time into seconds for calculations?

  To maintain consistency in units used
• How does the presence of reactants affect the rate of reaction?

  More reactants lead to a faster reaction