rate of chemical reactions

• What is measured to determine the rate of reaction in Experiment 1?

  Volume of gas released
• What gas is released when marble chips react with hydrochloric acid?

  Carbon dioxide gas
• How can the gas be collected during the reaction?

  Using a gas syringe or measuring cylinder
• Why is it important to seal the apparatus during the experiment?

  To prevent gas from escaping
• What happens to the rate of reaction as it progresses?

  It becomes slower over time
• What factors can affect the rate of reaction?

  Concentration and surface area
• What will be investigated in this experiment regarding concentration?

  The impact on the rate of reaction
• What safety equipment should be worn during the experiment?

  Safety goggles
• What is the first step in the experiment's method?

  Measure 50 cm³ of hydrochloric acid
• What should be done after adding marble chips to the conical flask?

  Quickly replace the bung
• What should be done after 100 seconds?

  Remove the bung
• How often should the volume of gas be recorded?

  Every 10 seconds
• What does the results table show in the experiment?

  Volume of gas collected at intervals
• How does concentration affect the rate of reaction?

  Higher concentration produces gas faster
• Why do powdered marble chips react faster than larger chips?

  They have a larger surface area
• What does a steeper graph indicate in the experiment?

  A faster rate of reaction
• Why does a higher concentration of acid lead to more frequent collisions?

  More acid particles in the same volume
• What is the relationship between surface area and reaction rate?

  Larger surface area increases reaction rate