Question 65
A series of experiments will be set up in the laboratory. You will be told which ones to carry out.
Safety
Before trying any of these reactions, you must carry out a risk assessment. Think about how you will stay safe.
Try some or all of these activities and decide if a chemical reaction has taken place. Share them with the class.
You do not need to carry out these investigations in any particular order.
For each investigation, state what you did and mention any safety considerations. What clues help you to decide?
Experiment C
You will need:
- safety glasses, limewater, a test tube, test tube rack, a straw
Half-fill a test tube with limewater. Use the straw and blow gently into it.
What do you observe? Has a chemical reaction taken place? What evidence do you have?
Safety note for this package: do not blow by mouth into limewater. Use a teacher-approved gas supply instead to avoid accidental ingestion.
Safety
Before trying any of these reactions, you must carry out a risk assessment. Think about how you will stay safe.
Try some or all of these activities and decide if a chemical reaction has taken place. Share them with the class.
You do not need to carry out these investigations in any particular order.
For each investigation, state what you did and mention any safety considerations. What clues help you to decide?
Experiment C
You will need:
- safety glasses, limewater, a test tube, test tube rack, a straw
Half-fill a test tube with limewater. Use the straw and blow gently into it.
What do you observe? Has a chemical reaction taken place? What evidence do you have?
Safety note for this package: do not blow by mouth into limewater. Use a teacher-approved gas supply instead to avoid accidental ingestion.
