Question 69
Investigate marble chips reacting with dilute hydrochloric acid. Measure the time taken to collect 25 cm³ of carbon dioxide in an inverted measuring cylinder over water. Discuss in your group how you will carry out this investigation: What mass of marble chips will you use? Which factors will you keep the same? Consider the volume and concentrations of acid, risks and safety precautions, equipment (including items not shown), preliminary trials and their purpose, and whether readings need repeating. Use the results of your group discussion to write a plan for your investigation.
