Osmosis Lab: Dialysis Tubing, Sucrose, and Mass Changes
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/20
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai | Chat |
|---|
No analytics yet
Send a link to your students to track their progress
21 Terms
What is osmosis?
Water moves across a membrane from lower solute concentration to higher solute concentration.
What solute is used in this lab?
Sucrose.
What acts like a simulated cell membrane in this lab?
Dialysis tubing.
What does 'In' refer to in the setup?
What is inside the bag.
What does 'Immerse in' refer to in the setup?
What is in the beaker.
How much solution should be used in the bag?
5 mL.
How much water should be in the beaker?
About 200 mL.
Why should air bubbles be squeezed out of the bag?
Osmosis needs solution on both sides of the membrane.
What should be used to weigh the bag?
A Petri dish.
What is the first step in data collection?
Weigh the bag before immersion.
How often should the bag be weighed after immersion?
Every 15 minutes for 60 minutes.
What is molarity?
Moles per liter of solution.
What is molality?
Moles per kilogram of water.
What is osmolarity?
Moles per liter.
What is osmolality?
Moles per kilogram of water.
Why do clinical labs prefer osmolality?
It is less affected by temperature and pressure.
What does % w/v represent?
Grams per 100 mL.
Why wasn't NaCl used in this lab?
It dissociates into very small particles that diffuse too quickly through the tubing.
What should the X-axis represent on the graph?
Time.
What should the Y-axis represent on the graph?
Weight or delta weight.
What is a quick memory trick for osmosis?
More solute equals more water movement toward it.