RP5

• What does the 'C' in the CIDERS acronym represent in the first version of the experiment?

  Mass/amount of Mg
• What does the 'I' in the CIDERS acronym represent in the first version of the experiment?


  Concentration of HCl
• What does the 'D' in the CIDERS acronym represent in the first version of the experiment?


  Mass of product produced (gas)
• What does the 'E' in the CIDERS acronym represent in the first version of the experiment?

  Beaker, bung, pipe, measuring cylinder, water trough, stopwatch
• What is the first step in the procedure for the first version of the experiment?


  Fill water trough and cylinder with water, and place delivery pipe up cylinder
• What should be done after preparing the conical flask in the first version of the experiment?


  Fill it with the first concentration of HCl
• What should be recorded every 10 seconds during the first version of the experiment?

  Mass of flask
• What should be done after recording the mass of the flask in the first version of the experiment?


  Repeat with other concentrations of HCl
• What type of graph should be recorded after the first version of the experiment?


  Concentrations of HCl (x-axis) to time (y-axis)
• What does the 'C' in the CIDERS acronym represent in the second version of the experiment?


  Amount of HCl
• What does the 'I' in the CIDERS acronym represent in the second version of the experiment?


  Concentrations of Sodium thiosulfate
• What does the 'D' in the CIDERS acronym represent in the second version of the experiment?


  Time taken for cross to disappear
• What does the 'E' in the CIDERS acronym represent in the second version of the experiment?


  White tile with black cross, Conical flask, stopwatch, sodium thiosulfate, HCl, distilled water
• What is the first step in the procedure for the second version of the experiment?

  Measure out different concentrations of sodium thiosulfate mixing it with water
• How do you prepare different concentrations of sodium thiosulfate in the second version of the experiment?


  Mix sodium thiosulfate with water in varying volumes
• What should be done after preparing the sodium thiosulfate solutions in the second version of the experiment?


  Put the conical flask on the black cross and add HCl
• What should be done after adding HCl in the second version of the experiment?


  Start the stopwatch and swirl the flask
• What should be recorded in the second version of the experiment?


  When the black cross disappears