Question

Gene is performing a lab activity. Part of the instructions for the activity are shown below.

Determination of the Unknown

1. Place 25 mL solution 1 into a 50-mL flask.

2. Heat the flask on a hot plate over low heat for 5 min.

3. Add 10 drops of solution 2 to the flask and swirl to mix.

4. Remove the flask from the heat, let it cool, and filter the resulting solution.

Safe practices that Gene should observe are listed below. Place the numbers 1 through 4 next to the steps below to indicate the proper order in which Gene should carry out the steps.

Use heat-resistant gloves or tongs to swirl the flask.

Put on safety goggles and an apron.

Check the flask for chips and cracks.

Read the entire lab procedure through and make sure it is understandable.

Answer 1

1 — Read the entire lab procedure through and make sure it is understandable.
2 — Put on safety goggles and an apron.
3 — Check the flask for chips and cracks.
4 — Use heat-resistant gloves or tongs to swirl the flask.