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Osmosis in different vegetables
Osmosis in different vegetables
Effects of sucrose solutions on mass of potato strips
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Investigating the Effects of Sucrose Concentration on the Mass of Potato Chips
The aim of my experiment is to investigate the effect of varying the
concentration of sucrose on a potato chip. I aim to observe the change
in mass, and I hope to view what happens to the chips as the
concentration increases, and I hope to see the effect that osmosis has
on the chip.
The experiment that I am conducting uses the process of osmosis.
Osmosis is the movement of water molecules across a partially
permeable membrane from a region of high water concentration to a
region of low water concentration. Partially-permeable membranesare
very thin layers of material which allow some substances to pass
through them but prevent other substances from passing through. For
example, a partially permeable membrane may allow water molecules to
pass through it, but may not allow larger molecules such as Glucose to
pass through. An example of a partially permeable membrane is visking
tubing, which is also known as 'dialysis tubing.' Visking tubing is a
partially permeable membrane with tiny pores, which allows small
molecules such as water to pass through but does not allow larger
molecules such as sugar. If solutions of different concentration are
on either side of the visking membrane, water molecules will pass
through and tend to dilute the more concentrated solution, hence the
idea of osmosis. Below is an example of osmosis. There is one section
of a beaker containing a solution of water and glucose molecules. The
other side of the beaker contains just water molecules. In between
both liquids is a partially permeable mebrane separating the two.
Partially permeable membrane.
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Glucose molecules
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Water molecules
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THE NET MOVEMENT OF WATER MOLECULES
Cell membranes are exactly the same as partially permeable membranes.
Cell membranes will allow small molecules like Oxygen, Water, Carbon
In life, it is critical to understand what substances can permeate the cell membrane. This is important because the substances that are able to permeate the cell membrane can be necessary for the cell to function. Likewise, it is important to have a semi-permeable membrane in the cell due to the fact that it can help guard against harmful items that want to enter the cell. In addition, it is critical to understand how water moves through the cell through osmosis because if solute concentration is unregulated, net osmosis can occur outside or inside the cell, causing issues such as plasmolysis and cytolysis. The plasma membrane of a cell can be modeled various ways, but dialysis tubing is especially helpful to model what substances will diffuse or be transported out of a cell membrane. The experiment seeks to expose what substances would be permeable to the cell membrane through the use of dialysis tubing, starch, glucose, salt, and various solute indicators. However, before analyzing which of the solutes (starch, glucose, and salt) is likely to pass through the membrane, it is critical to understand how the dialysis tubing compares to the cell membrane.
Investigation of the Concentration and the Effect of Sucrose on Osmosis in Apple and Potato Tissues
This cell membrane plays an important part in Diffusion. Cell membrane and Diffusion Diffusion is the movement of the molecules of gas or liquids from a higher concentrated region to a lower concentration through the partially permeable cell membrane along a concentraion gradient. This explanation is in the diagram shown below: [IMAGE] Turgor When a plant cell is placed in a dilute solution or a less concentrated solution then the water particles pass through the partially permeable membrane and fill the cell up with water. The cell then becomes Turgor or hard. An example of this is a strong well-watered plant.
All of these substances cross the membrane in a variety of ways. From diffusion and osmosis, to active transport the traffic through the cell membrane is regulated. Diffusion is the movement of molecules form one area of higher concentration to an area of lower concentration. Concentration gradient causes the molecules to move from higher concentration to a lower concentration.
Osmosis in Potato Tubes Osmosis: Osmosis is the movement of water molecules through a semi-permeable membrane from a high concentration to a low concentration. Diagram: [IMAGE] [IMAGE] Aim: To see the effects of different concentration of sugar solution on Osmosis in potato tubes. Key factor: In the investigation we change the sugar solution from: 0%-10%-20%-30%-40%-50% this is the independent variable; the dependant variable is the change in mass. Prediction: I predict that all the potato tubes in pure water or low concentration sugar solution will swell because water enters their cells by osmosis.
Nowadays there are hundreds of different kinds of candies and hundreds of different brands that make them. Skittles and M&M’s are among todays’ most popular candies. They’re pretty similar when comparing packaging, size and colors, although they have very different taste. They’re both small and round, and come in small rectangular bags but Skittles are more of a sugary fruity flavor while M&M’s are chocolate. These candies are known all around the world. One may ask how these candies came to be so popular? The answer lies in the different strategies companies use to promote their treats towards specific groups of people. The Skittles commercial is directed towards more of a young audience considering how it uses sexual humor while the M&M’s
When a cell membrane is said to be selectively permeable, it means that the cell membrane controls what substances pass in and out through the membrane. This characteristic of cell membranes plays a great role in passive transport. Passive transport is the movement of substances across the cell membrane without any input of energy by the cell. The energy for passive transport comes entirely from kinetic energy that the molecules have. The simplest type of passive transport is diffusion, which is the movement of molecules from an area of high concentration to an area of lower concentration. Diffusion
Investigating the Relationship Between Surface Area and the Rate of Oxygen Produced When Potato is Placed in Hydrogen Peroxide
Determining the Water Potential of a Potato Chip Aim: To determine the water potential of a potato chip Background knowledge What is water potential? Water potential is the measure of the tendency of water to move from one place to another. Like the movement of water from potato chip to surrounding solution or vice versa. Water always moves from an area of high water potential to a region of lower water potential. The addition of solutes decreases water potential making it more negative.
When doing this experiment I was able to see the effect of different concentrations on the rate of osmosis, each was done by measuring the initial mass and length of the potato cylinder and after osmosis, the results were conducted to show that as the sucrose concentration increases the rate of osmosis also increases as I said in my hypothesis thusly making a direct decrease in mass.
Determining the Effect of Different Sugar Concentrations on Benedict's Solution PLANNING: Hypothesis and prediction: My hypothesis is that the sugar solution with the highest concentration will turn the precipitate the darkest colour. This will be the 10% sugar solution. This is because the more amount of sugar it contains the more it will reduce the Copper. It will be a much darker precipitate compared to the other two. Background theory: Benedict's solution is an aqueous solution of Copper (II) Sulphate, Sodium carbonate and Sodium citrate.
Investigating the Effect of Sugar Solution on the Weight and Size of Potato Cells Aim: To investigate whether the different concentration of sugar solution will affect the weight and size of the potato cells. General background information: Osmosis is defined as the movement of water or any other solution's molecules from an area in which they are highly concentrated to a region in which they are less concentrated. This movement must take place across a partially permeable membrane such as a cell wall, which lets smaller molecules (E.g. water) through but does not allow larger solute molecules to pass through. The molecules will continue to diffuse until the area in which the molecules are found to reach a state of equilibrium, meaning that the molecules are equally distributed throughout the cell, with no area having a higher or lower concentration than any other hence equal. Hypothesis/prediction: For this particular investigation I believe that the lower the concentration of the sugar solution in the test tube the mass of the potato will be greater and the longer the potato cells will be.
Most cell membranes are like that, being permeable to water and some solutes only. Osmosis is therefore the diffusion of water through a partially permeable membrane. The basic principles of diffusion apply here.
Osmosis is the passage of water molecules from a weaker solution to a stronger solution through a partially permeable membrane. A partially permeable membrane only allows small molecules to pass through, so the larger molecules remain in the solution they originated in. Solute molecule [IMAGE] [IMAGE] Water molecule [IMAGE] The water molecules move into the more concentrated solution. When water enters a plant cell it swells up. The water pushes against the cell wall and the cell eventually contains all that it can hold.
The Effect of Solute Concentration on the Rate of Osmosis Aim: To test and observe how the concentration gradient between a potato and water & sugar solution will affect the rate of osmosis. Introduction: Osmosis is defined as, diffusion, or net movement, of free water molecules from high to low concentration through a semi-permeable membrane. When a substance, such as sugar (which we will be using in the experiment we are about to analyse), dissolves in water, it attracts free water molecules to itself, and in doing so, stops them from moving freely. The effect of this, is that the concentration of (free) water molecules in that environment goes down. There are less free water molecules, and therefore less water molecules to pass across a semi-permeable membrane, through which sugar molecules and other molecules attached to them are too big to diffuse across with ease.