Setting Up Equipment

• What is as important as making accurate measurements in an experiment?

  Setting up the equipment correctly
• Why does the system need to be sealed when collecting gases?

  To prevent gas escape during collection
• When might you want to collect gas produced by a reaction?

  To investigate the rate of reaction
• What is the most accurate way to measure the volume of gas produced?

  Collect it in a gas syringe
• How can you collect gas by displacing water?

  By using a measuring cylinder upside down
• What are the steps to collect gas using a measuring cylinder?

  • Fill the measuring cylinder with water
  • Invert it in a water container
  • Allow gas to displace the water
  • Record the initial water level
  • Position the delivery tube correctly
  • Record the final water level
  • Calculate the volume of gas produced
• What should you record when collecting gas in a measuring cylinder?

  The initial level of water
• What should you do with the delivery tube when collecting gas?

  Ensure it points upwards inside the measuring cylinder
• What happens to the water level in the measuring cylinder as gas enters?

  The water level decreases as gas fills it
• What should you do after collecting gas in a test tube?

  Stopper it to store for later
• Why is using a gas syringe more accurate than other methods?

  It prevents gas from escaping during measurement
• If you want to collect a sample of gas without knowing its volume, what can you do?

  Use a test tube to collect a sample
• How does the method of collecting gas affect the accuracy of the results?

  Different methods can lead to gas loss or errors
• What is a potential issue when using a gas syringe?

  Some gases may dissolve in water
• Why might some gases not be collected accurately using water displacement?

  They may be soluble in water
• What should you do if the delivery tube is under the measuring cylinder?

  Adjust it to be inside the cylinder
• How do the products of electrolysis depend on the solution used?

  They depend on the reactivity of ions present
• What ions are compared to determine the products of electrolysis?

  H+ and OH- ions
• What happens to the products of electrolysis in a solution?

  They depend on the reactivity of ions
• What is the purpose of storing gas for later?

  To use it in future experiments
• What do the products of electrolysis depend on?

  They depend on the ions in the solution
• How are the products of electrolysis compared to H+ and OH- ions?

  They are compared based on their reactivity
• What can you get at the cathode during electrolysis?

  A pure metal or hydrogen gas
• What happens at the anode during electrolysis?

  You get bubbles of oxygen gas unless halide is present
• What must you predict when conducting an electrolysis experiment?

  You must predict the products formed
• What is the easiest way to collect gas produced in electrolysis?

  • Use an inverted test tube
  • Ensure the test tube is filled with solution
  • Collect gas at the top of the tube
• What equipment is needed for electrolysis setup?

  Electrodes and a power supply
• Why is it important to draw diagrams of your equipment?

  To clearly show the setup of the apparatus
• What should you include in your diagrams for experiments?

  Labels showing how the apparatus is set up
• What is a good practice when writing out methods for experiments?

  To draw labeled diagrams of the setup
• How can you ensure your experiments are reliable?

  By setting up equipment correctly
• What might you be asked to comment on in an exam regarding experiments?

  How the experiment was set up
• What is the importance of practical skills in experiments?

  They enhance the reliability of investigations
• Why should you thank someone for their help in experiments?

  To acknowledge their support and assistance
• What are practical skills essential for in experiments?

  • Setting up equipment correctly
  • Conducting experiments reliably
  • Analyzing results accurately