Question 68
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 F
You will need:
- safety glasses, sodium hydroxide, conical flask, measuring cylinder, universal indicator, hydrochloric acid, burette
Place of sodium hydroxide in a conical flask and add a few drops of universal indicator solution. Add acid slowly from a burette until the universal indicator changes to green.
What do you observe? Has a chemical reaction taken place? What evidence do you have?
Source note: the printed sentence reads “Place of sodium hydroxide” and supplies no quantity. Obtain the missing amount from the teacher.
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 F
You will need:
- safety glasses, sodium hydroxide, conical flask, measuring cylinder, universal indicator, hydrochloric acid, burette
Place of sodium hydroxide in a conical flask and add a few drops of universal indicator solution. Add acid slowly from a burette until the universal indicator changes to green.
What do you observe? Has a chemical reaction taken place? What evidence do you have?
Source note: the printed sentence reads “Place of sodium hydroxide” and supplies no quantity. Obtain the missing amount from the teacher.
