mean rate of reaction

• What does the slope of the line on a graph of a chemical reaction indicate?

  The slope indicates the rate of reaction
• If the slope of the graph is steep, what can we infer about the reaction?

  The reaction is occurring quickly
• Why does the slope of the line become less steep over time in a chemical reaction?

  Because many reactant molecules have already reacted
• What does a flat line on the graph indicate about the reaction?

  It indicates that the reaction has stopped
• In what unit is the quantity of product formed measured if it is a gas?

  Centimeters cubed
• How can we also measure the rate of a chemical reaction aside from measuring the quantity of product formed?

  By measuring the quantity of reactant used
• What is the formula to calculate the mean rate of a chemical reaction?

  • Mean rate of reaction = Quantity of product formed / Time taken
• If 60 grams of product is formed in 15 seconds, what is the mean rate of reaction?

  4 grams per second
• What is the mean rate of reaction if 20 grams of product is formed in 40 seconds?

  0.5 grams per second
• How do you calculate the mean rate of reaction from the quantity of reactant used?

  Mean rate of reaction = Quantity of reactant used / Time taken
• If 30 grams of reactant is used in 10 seconds, what is the mean rate of reaction?

  3 grams per second
• What is the mean rate of reaction if 150 grams of reactant is used in 75 seconds?

  2 grams per second