Class 9 Exam > Class 9 Notes > Osmosis experiment with egg lab report for biology
Osmosis experiment with egg lab report for biology - Class 9 PDF Download
How does osmosis keep you healthy?
Right now, as you read this, there are millions of things happening throughout your body. The food you ate just a bit ago is making its way through a watery slurry inside your stomach and small intestines. Your kidneys are working hard to excrete waste and extra water. The lacrimal glands near your eyes are secreting tears, which allow your eyelids to close without damaging your eyeballs. What’s one thing that all of these processes have in common? They all rely on osmosis: the diffusion of water from one place to another.
Osmosis factors heavily in each of these processes and is an important force for keeping every single cell in your body healthy. Osmosis is hard to see without a microscope. But if we create our very own model of a cell, using a shell-less chicken egg, we can see what happens when we manipulate the osmotic balance in the “cell”!
Materials
3 eggs
3 glasses (large enough to fit the egg plus liquid)
3 butter knives
White vinegar (about 3 cups)
Distilled water (about 2 cups)
Light corn syrup (about 1 ¼ cups)
Slotted spoon
Measuring cup (1 cup)
Measuring spoons (1 tablespoon and ½ tablespoon)
Sticky notes and marker
Scale (optional)
Procedure
Note: It’s okay to touch the eggs, but remember to wash your hands afterwards to avoid any nasty surprises!
Place one egg in each glass. Pour in enough vinegar to cover each egg. Bubbles will start to form around the egg, and it’ll float up. To keep it submerged, put a butter knife in the glass to hold it down.
Put the three glasses in the refrigerator and allow to sit for 24 hours.
Gently holding the egg in the glass, pour out the old vinegar. Replace with fresh vinegar, and let sit in the refrigerator for another 24 hours. Repeat this process until the shells are fully dissolved and only the membrane remains. This should take about 2-3 days.
Gently remove the eggs using the slotted spoon and rinse with tap water in the sink. Rinse out the empty glasses as well.
Gently put the shell-less eggs aside for a moment on a plate.
Prepare three different sugar-water solutions as follows, labeling with sticky notes:
Glass 1: Label “hypertonic”. Pour in one cup of corn syrup.
Glass 2: Label “isotonic”. Add 1 ½ tablespoons corn syrup to the one cup measuring cup, and fill the remainder with distilled water. Pour into glass (make sure you get all the corn syrup out!) and stir to dissolve.
Glass 3: Label “hypotonic”. Pour in one cup of distilled water.Gently put one shell-less egg in each of the glasses, and let sit in the refrigerator for another 24 hours.
Remove the glasses from the refrigerator, and gently put the eggs on a plate. If you weighed the eggs before putting them in each solution, weigh them again. What happened to each of the eggs?
How does osmosis work?
Osmosis is the scientific term that describes how water flows to different places depending on certain conditions. In this case, water moves around to different areas based on a concentration gradient, i.e. solutions which have different concentrations of dissolved particles (solutes) in them. Water always flows to the area with the most dissolved solutes, so that in the end both solutions have an equal concentration of solutes. Think about if you added a drop of food dye to a cup of water – even if you didn’t stir it, it would eventually dissolve on its own into the water.
In biological systems, the different solutions are usually separated by a semipermeable membrane, like cell membranes or kidney tubules. These act sort of like a net that keeps solutes trapped, but they still allow water to pass through freely. In this way, cells can keep all of their “guts” contained but still exchange water.
Now, think about the inside of an egg. There’s a lot of water inside of the egg, but a lot of other things (i.e. solutes) too, like protein and fat. When you placed the egg in the three solutions, how do you think the concentration of solutes differed between the inside of the egg and outside of the egg? The egg membrane acts as a semipermeable membrane and keeps all of the dissolved solutes separated but allows the water to pass through.
How did osmosis make the eggs change size (or not)?
If the steps above work out properly, the results should be as follows.
In the case of the hypertonic solution, there were more solutes in the corn syrup than there were in the egg. So, water flowed out of the egg and into the corn syrup, and as a result the egg shriveled up.
In the case of the isotonic solution, there was roughly an equal amount of solutes in the corn syrup/water solution than there was in the egg, so there was no net movement in or out of the egg. It stayed the same size.
In the case of the hypotonic solution, there were more solutes in the egg than in the pure water. So, water flowed into the egg, and as a result, it grew in size.
FAQs on Osmosis experiment with egg lab report for biology - Class 9
| 1. What is osmosis? |  |
Ans. Osmosis is the process by which water molecules move from an area of low solute concentration to an area of high solute concentration across a selectively permeable membrane. It plays a crucial role in maintaining the balance of water and solutes in living organisms.
| 2. How does osmosis occur in the egg experiment? | |
Ans. In the egg osmosis experiment, a shell-less egg is placed in different solutions (such as water, saltwater, or sugar solution) to observe the movement of water through the egg's membrane. The egg's membrane acts as the selectively permeable membrane, allowing water molecules to pass through while restricting the passage of solutes. Osmosis occurs as water molecules move from the solution with lower solute concentration to the solution with higher solute concentration, resulting in the change in the egg's size.
| 3. What factors affect the rate of osmosis in the egg experiment? | |
Ans. Several factors can affect the rate of osmosis in the egg experiment. These include the concentration gradient between the egg and the surrounding solution, the temperature of the solutions, the surface area of the egg, and the duration of the experiment. A steeper concentration gradient, higher temperature, larger surface area, and longer duration can generally increase the rate of osmosis.
| 4. What can be inferred from the changes in the egg's size during the osmosis experiment? | |
Ans. The changes in the egg's size during the osmosis experiment provide insights into the movement of water across the egg's membrane. If the egg increases in size, it indicates that water has moved into the egg, suggesting that the surrounding solution had a lower solute concentration than the egg. Conversely, if the egg decreases in size, it indicates that water has moved out of the egg, suggesting that the surrounding solution had a higher solute concentration than the egg.
| 5. How can the osmosis experiment with eggs be related to real-life scenarios? | |
Ans. The osmosis experiment with eggs can be related to real-life scenarios such as the process of food preservation. For example, when food is preserved using salt or sugar, it creates a high solute concentration around the food, causing water to move out of the food through osmosis. This helps to prevent the growth of bacteria and other microorganisms that require water to survive. Similarly, understanding osmosis is also important in understanding how cells regulate their water balance and how plants absorb water from the soil.
Related Exams
About this Document
|
4.94/5 Rating |
|
Nov 17, 2024 Last updated |
Document Description: Osmosis experiment with egg lab report for biology for Class 9 2024 is part of Class 9 preparation. The notes and questions for Osmosis experiment with egg lab report for biology have been prepared according to the Class 9 exam syllabus. Information about Osmosis experiment with egg lab report for biology covers topics like and Osmosis experiment with egg lab report for biology Example, for Class 9 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Osmosis experiment with egg lab report for biology.
Introduction of Osmosis experiment with egg lab report for biology in English is available as part of
our Class 9 preparation & Osmosis experiment with egg lab report for biology in Hindi for Class 9
courses. Download more important topics, notes, lectures and mock test series for Class 9
Exam by signing up for free. Class 9: Osmosis experiment with egg lab report for biology - Class 9
Description
Full syllabus notes, lecture & questions for Osmosis experiment with egg lab report for biology - Class 9 - Class 9 | Plus excerises question with solution to help you revise complete syllabus | Best notes, free PDF download
Information about Osmosis experiment with egg lab report for biology
In this doc you can find the meaning of Osmosis experiment with egg lab report for biology defined & explained in the simplest way possible.
Besides explaining types of Osmosis experiment with egg lab report for biology theory,
EduRev gives you an ample number of questions to practice Osmosis experiment with egg lab report for biology tests, examples and also practice Class 9 tests.
Download as PDF
|
Explore Courses for Class 9 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
ppt
,Previous Year Questions with Solutions
,shortcuts and tricks
,video lectures
,Important questions
,practice quizzes
,mock tests for examination
,Viva Questions
,Exam
,Semester Notes
,Extra Questions
,Objective type Questions
,Osmosis experiment with egg lab report for biology - Class 9
,Summary
,Sample Paper
,past year papers
,Osmosis experiment with egg lab report for biology - Class 9
,MCQs
,Osmosis experiment with egg lab report for biology - Class 9
,Free
,study material
;
Additional Information about Osmosis experiment with egg lab report for biology for Class 9 Preparation
Osmosis experiment with egg lab report for biology Free PDF Download
The Osmosis experiment with egg lab report for biology is an invaluable resource that delves deep into the core of the Class 9 exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the Osmosis experiment with egg lab report for biology now and kickstart your journey towards success in the Class 9 exam.
Importance of Osmosis experiment with egg lab report for biology
The importance of Osmosis experiment with egg lab report for biology cannot be overstated, especially for Class 9 aspirants.
This document holds the key to success in the Class 9 exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
Osmosis experiment with egg lab report for biology Notes
Osmosis experiment with egg lab report for biology Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to Osmosis experiment with egg lab report for biology.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, Osmosis experiment with egg lab report for biology Notes on EduRev are your ultimate resource for success.
Osmosis experiment with egg lab report for biology Class 9 Questions
The "Osmosis experiment with egg lab report for biology Class 9 Questions" guide is a valuable resource for all aspiring students preparing for the
Class 9 exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study Osmosis experiment with egg lab report for biology on the App
Students of Class 9 can study Osmosis experiment with egg lab report for biology alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Osmosis experiment with egg lab report for biology,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Osmosis experiment with egg lab report for biology is prepared as per the latest Class 9 syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup