Question 9
In this experiment, add 50 ml of dilute hydrogen peroxide (1.5 M) to a conical flask, then add 1 g of yeast. Quickly fit a stopper connected by a delivery tube to an inverted, water-filled measuring cylinder in a water trough. Collect oxygen over water and record its volume every 30 seconds. Wear safety goggles and gloves.
Record the volume of oxygen gas collected in the measuring cylinder at regular intervals (for example, every 30 seconds). Complete the table.
| Time (seconds) | Volume of oxygen gas (ml) |
|---|---|
| 0 | … |
| 30 | … |
| 60 | … |
| 90 | … |
| 120 | … |
| 150 | … |
| 180 | … |
| 210 | … |
Record the volume of oxygen gas collected in the measuring cylinder at regular intervals (for example, every 30 seconds). Complete the table.
| Time (seconds) | Volume of oxygen gas (ml) |
|---|---|
| 0 | … |
| 30 | … |
| 60 | … |
| 90 | … |
| 120 | … |
| 150 | … |
| 180 | … |
| 210 | … |
