Osmosis Lab Walkthrough

Mr. Anderson guides students through an osmosis lab, also known as the potato lab. The lab involves using potato cores and different concentrations of sucrose solutions to observe changes in mass over time. Students are instructed on the materials needed, how to set up the experiment, and how to collect and analyze data. The goal is to measure the percent change in mass of the potato cores after 24 hours. Mr. Anderson provides tips to ensure accurate results and explains the importance of labeling and covering the test tubes to prevent evaporation.

What is the purpose of using different concentrations of sucrose in the osmosis lab?

• To observe the effect of sucrose on potato color

• To determine the boiling point of sucrose solutions

• To test the potato's ability to absorb sucrose

• To measure the change in potato mass due to osmosis

Why is it important to trim the potato cores to a similar size?

• To ensure consistent results in mass change

• To prevent them from floating

• To make them easier to handle

• To ensure they fit in the test tubes

What is the role of parafilm in the experiment?

• To measure the mass of the potato cores

• To label the test tubes

• To prevent evaporation of the solution

• To add flavor to the solution

What should be done after 24 hours in the osmosis lab?

• Increase the temperature of the solutions

• Replace the potato cores with new ones

• Re-mass the potato cores and calculate the percent change

• Add more sucrose to the solutions

What does a positive percent change in mass indicate about the potato core?

• It lost water

• It gained water

• It dissolved in the solution

• It remained the same