Contact Us
Sign In / Sign Up for FREE
Go to advanced search...

Osmosis - Lab Report Example

Comments (1) Cite this document
The paper aims to consider the osmosis and diffusion. When the cellophane sack containing varying concentrations of glucose solution is placed inside the distilled water, because of the varying solute concentration on both sides of the membrane, the movement of the solvent molecule occurs. …
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER91.6% of users find it useful
Osmosis Lab Report
Read TextPreview

Extract of sample "Osmosis"

Download file to see previous pages Cells require the movement of the chemicals inside and outside the cell for their survival. Cells require the movement of mainly the solute and solvent molecules inside and out of the cells for their proper functioning. The movement of the molecules occurs by active and passive processes. If the cell uses ATP for the transport of the molecules then it is termed as active process and if the molecules crosses the membrane with the help of concentration gradient, then it is called as passive process. Simple diffusion, facilitated diffusion and osmosis are the types of passive process.
Osmosis is the movement of water molecules from a lower solute concentration to the higher solute concentration through a permeable membrane. Water molecule is much smaller than most of the solute molecules. Thus they are able to move through the membranes in which the solute molecules cannot pass through. This property of the water molecule is called as osmosis.
The cell membranes are more permeable to the water molecules than most other solvents. As a result the cell membrane allows most of the water molecules to penetrate inside the cell. This results in the hypotonic condition of the cell. As a result the cell swells. Sometimes the solute concentration will be higher outside the cell membrane and as a result, the cell looses its water molecules out. This results in cell shrinkage termed as hypertonic solution. Is there is no change in the solute concentration inside and outside the membrane, then the solution is said to be isotonic. Osmosis is very essential for the biological systems. The biological membranes are semi permeable in nature. Water molecules travel through the plasma membrane by diffusing across the phospholipid bilayer using the transmembrane proteins. Cellophane membrane is a type of partially permeable membrane that can allow the water molecules to pass through. Cellophane membrane is made by regenerating the cellulose by the addition of some chemicals like alkali, carbon disulfide and sulfuric acid. Cellulose is derived from the wood, hemp and cotton. The Glucose molecules are larger than the water molecules and they don’t diffuse through the cellophane membrane. When the different glucose concentrations are kept separated by the cellophane membrane, the movement of the solvent molecule, (i.e.) the water molecules, from the region of higher concentration to the region of lower concentration occurs. The thermodynamic property of the solution to reach the equal concentration in both sides of the membrane takes place. Materials required: 4 finger bowls 4 pieces dialysis membrane 8 pieces string Metric ruler Hot plate Glass stirring rod Test tubes 50% glucose solution Squeeze bottle of distilled water Paper towels Electronic scale Boiling beads Plastic pan Dropper bottle of Benedict’s solution. Beakers of varying size ( 200 ml, 500 ml, 1000 ml) Pipettes Graduated cylinder ( 10 ml, 25 ml) Distilled water. Method: The 4 cellophane membranes are made active by dipping it in the distilled water. The membranes become wet and flexible. From the stock 50% glucose solution, the appropriate concentration of glucose solutions is prepared by diluting them appropriately with the distilled wat ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
(“Osmosis Lab Report Example | Topics and Well Written Essays - 1000 words”, n.d.)
Retrieved from
(Osmosis Lab Report Example | Topics and Well Written Essays - 1000 Words)
“Osmosis Lab Report Example | Topics and Well Written Essays - 1000 Words”, n.d.
  • Cited: 1 times
Comments (1)
Click to create a comment or rate a document
conroykeira added comment 1 year ago
Student rated this paper as
At first, I thought 4 of pages is too much for such a question. But now I see it could not be done smarter. As the author starts you see the difficulty of the topic. I’ve read all at once. Precise text


Osmosis And The Egg

...Osmosis And The Egg Purpose The aim of this experiment was to use an egg to test the effects of osmosis and to determine if the size of the egg changed when it was exposed to different solutes. Background Diffusion is the process whereby molecules travel from high to low concentrations producing a uniform mixture. Osmosis is a specific form of this where water molecules travel across a semi permeable membrane in response to the difference in concentrations, also known as the gradient in concentration. This transport is passive and does not require any energy. Water molecules will move in the direction of a high concentration of solute, and hence low water concentration until...
4 Pages(1000 words)Lab Report


...?Studying the impact of solute concentration on the rate of osmosis Introduction: Osmosis is defined as the movement of water molecules through a selective membrane (Freeman, 2010). Osmosis occurs so as to balance the water potential on either side of the membrane. Water potential is used to describe the tendency with which water moves from one region to another. This experiment was carried out in order to determine how the rate of osmosis changes under different solute concentrations. Solute concentrations heavily influence how osmosis occurs. In animal cells, when the solute concentration is equal on both sides of the membrane, there will be no movement...
4 Pages(1000 words)Lab Report

Diffusion and Osmosis Lab Report

...Diffusion and Osmosis Laboratory Report For a cell to survive, the exchange of water from outside to cell to inside and vice versa is extremely important since water serves as the medium for transport of metabolic ingredients and byproducts. It can occur mainly through two biophysical processes, osmosis and diffusion. Depending on the biological process, the cell exerts its option of choosing either of the two in a given exchange process. Physical movement of water occurs in both of these processes depending on the physical characteristics of the solutions that are being exchanged. The cell and its extracellular environments are fluid in that concentrations of substances dissolved in it vary. Depending on varying concentration... of the...
10 Pages(2500 words)Lab Report

Diffusion and Osmosis

...Diffusion and Osmosis - Introduction One cannot overestimate the importance of such simple, yet essential processes like diffusion and osmosis. Whilethe former represents a movement of molecules of substance from a region with higher concentration of that substance to a region of lower concentration, the latter usually refers to a process of movement of molecules through a semi-permiable membrane. Since the cell membranes represent semi-permiable membranes, the processes of diffusion and in particular, osmosis, are clearly evident. The importance of these two processes is based on the fact that they determine the distribution of nutrients and the disposal of waste products of metabolism....
4 Pages(1000 words)Lab Report

The Advantages and Disadvantages of Having A National History

8 Pages(2000 words)Essay

Investigate osmosis in blood cells their concentration gradients. Attracted by fixed anions, such as hemoglobin, ATP, and 2,3-BPG, sodium accumulates in the cell in excess of potassium loss and of the compensatory efforts of the Na+-K+ pump. The resulting increase in intracellular monovalent cations and water is followed by cell swelling and ultimately colloid osmotic hemolysis (Dacie, J. V., Lewis, S. M., and Luzzatto, L., 1981). Rationale of the Test: Osmotic activity in the red cells is tested by adding increasingly hypotonic concentrations of saline solution to red cells. As a result of osmosis, more and more water from the increasingly hypotonic solution will enter the red cells leading to increased volume of red cells by swelling. If the...
5 Pages(1250 words)Lab Report

Egg Osmosis

...thermodynamic activity, water movement, or osmosis, should go from a low (hypotonic solution) to high concentration (hypertonic solution) of solutes. If no osmosis was observed, the cytoplasm is said to be isotonic to the surrounding solution. Osmosis happening in cells was replicated in this experiment, with unshelled eggs representing the cells with differentially permeable plasma membrane. The objective of this experiment was to observe the effects of changing the extracellular concentration s to the amount of water within the cell. Methods Six unshelled eggs of predetermined weight were subsequently submerged in 0%, 10%, 20%, 30%, 40%, and x % sucrose for 15 min. The sucrose...
6 Pages(1500 words)Lab Report

Lab report on NITROGEN

...again, or they receive a kidney transplant (Williams 11-16). The biological process of osmosis is also important in the regulation of nitrogen. Osmosis is a diffusive process, which works by having water move from areas of high concentration to areas of low concentration. As stated before, ions, such as nitrates, can affect this equilibrium process such as in the excretory system. Therefore, the proper levels of nitrates in the system ensure that osmosis is occurring in the way the body designed it. Even though carbon is the principle “organic” element, nitrogen has many properties, which cannot only be applied in biology and medicine, but also in industrial application as well. It is a...
2 Pages(500 words)Lab Report

Lab assignment

...Lab assignment Purpose The purpose of the experiment was to evaluate diffusion and osmosis process across semipermeablemembranes. The main aim of the experiment was to examine the movement of materials across dialysis tubing. The dialysis tubing was used in this experiment since is a form a semi permeable membrane or tubing that has properties of cellulose and cellophane membranes; thus, the membrane is vital in investigating the properties of real cell membranes. Moreover, it perfectly responds to water as a solvent. Notably, the movement of these materials depended on the concentrated of the solved and the permeable membrane involved in the movement. Hypothesis The main this experiment was to demonstrate that an active...
1 Pages(250 words)Lab Report

An introduction for the germination experiment

...from the surrounding environment through osmosis. Water absorbed activates enzymes, increases the rate of respiration and leads to duplication of plant cells. Secondly, the chemical energy stored as starch is converted to sugar and serves the embryo as food during the process of germination. The embryo is nourished and enlarged resulting in seed coat burst. Lastly, a root tip known as the radicle emerges from the seed and grows downwards to anchor the seed. The radicle enables the embryo to absorb water and minerals from the soil (Jirage 1). A study on the effects of treatment on seed germination will be carried out as a laboratory experiment. The experiment will involve a non-dominant maize seed and a treatment acid....
1 Pages(250 words)Lab Report
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Lab Report on topic Osmosis Lab Report for FREE!

Contact Us