Factors Affecting the Rate of Osmosis
Plan
Aim
To find out if osmosis occurs in a potato, and to observe how
different concentrations of a solution affect the rate of osmosis in
the potato.
What Is Osmosis?
Before actually planning the experiment, I will do some research to
find out about osmosis, and matters related to it, so that I can make
predictions and work out a way to make this investigation fair and
safe. Planning ahead would assist me in finding out how to do what,
when to do it etc. This should lead me to good results at the end of
the experiment.
Osmosis is the movement of water molecules from a solution of high
water concentration to an area of low water concentration, through a
semi permeable membrane. Below is a diagram illustrating the process
of osmosis:
[IMAGE]
Water potential is the tendency of water to move from an area of
higher concentration to one of lower concentration. This is a main
factor that affects the rate of osmosis, as the higher the
concentration of the water, the more likely it is to move to an area
of low water concentration.
In this case, the tiny holes in the membrane of the potatoes will
allow the water molecules to pass through in and out of the solution
and the potato, depending on the concentration gradient of the two
substances. So in this case, when the water concentration is lower in
the potato, the water will go inside the tissue of the potato, and the
potato will gain weight. If there is very little different in the two
water concentrations, there shouldn’t be such a big change in weight.
And if there is a higher concentration of water in the potato, the
water will go out of the potato. The potato cells will have decreased
in length, volume and mass due to a process called plasmolysis.
The cell is surrounded by water so it absorbs the water making the
- The nurse’s mistake will increase the saltiness due to the double amount of saline in the bag.
Considering the fact that Marc has both been sweating and drinking minimal amounts of water, Marc is now dehydrated. This means he has less than the required amount of water for his body to complete the processes necessary to maintain its health. As stated in the question, the process of sweating causes the loss of more water than solutes. This means that as the level of water decreases, the level of solute concentration will increase, creating a change in the water to solute ratio.
Osmosis Experiment Planning Aim: The main subject that I will be planning to investigate is the effects of a concentrated sucrose solution on potato cells on the basis of the Osmosis theory. Background knowledge: The plant cell and its structure To understand osmosis in detail I will need to explain the plant cell (which is the cell included in the osmosis experiment) and its cell membrane. Below I have a diagram of a plant cell: [IMAGE] Osmosis is about the movement of particles from a higher concentrated solution to a lower concentrated solution to create an ethical balance via a partially or semi permeable cell membrane. Osmosis in simple terms is the exchange of particles between the cytoplasm inside the cell and the solution outside the cell. What makes this exhange is the partially permable cell membrane.
* We would have to leave one end open to fill it up with the different
When I am not using them I will place them away from my experiment and
My first step to this was planning out the days and times in which I would go to the gym. I decided to go at three different times on thee days. 9:00 am, 3:00 pm. and 6:00 pm. I would go into the gym and do my normal lifting workout for swimming. I’d be careful to take mental notes as to what other
The purpose of this experiment is to investigate the effect of changing the concentration of sodium chloride solution on the rate of osmosis in tubes of potatoes. This was maintained using equal measurements of the potato tubes and applying them into the different concentrations of sodium chloride, 0%, 2%, 5%, 10%, 20% and 26%, in beakers then measuring the change in mass of the potato tubes afterwards. The time taken for all potato tubes to be placed in solution was 15 minutes. Can the concentration gradient of the sodium chloride solution influence on the rate of osmotic diffusion undergone by the potato tubes?
If the concentration of sucrose increases, then the mass of the potato will decrease. However, if the concentration of the solution in the beaker is less than that of the potato (such as distilled water), then the mass of the potato will increase. So, as the concentration of sucrose increases the rate of osmosis increases.
I was able to gain knowledge about the different parts of the body which are important in the field of bodybuilding. I discover that there are main muscle groups and each of these muscle groups have different parts. For example, the main muscle groups would be the chest, back, arms, shoulders and legs. Now each of these main muscle groups have more that one part, your arms has biceps, triceps and a forearms. Each of these parts are made up or many more segments that can construct a list that can go on for a while. Gaining such a vast understanding of my body was thrilling. I was able to understand all the parts of my body. I am confident that I know almost every muscle group that is in the known human body. After learning about each individual muscle, I was then able to move on to the next step understanding how to train these individual muscle groups. I figured out that there are different routines that you have to follow in order to train each muscle. For example, your legs can be split into different muscles segments such as the quads, calves, and hamstrings. Once I isolated each muscle segment I was able to find workouts for each of them. For the quadriceps you would do workouts known as a barbell squat, lunges and reverse leg curls. Then after finding this out I had to
Collecting baseline data in first 3 days. In these days I would not use any conditioning, just to measure the baseline data of my sleeping time.
*Note: Each exercise does not have to be done simultaneously. Because of varied work schedule and other activities, spread exercises according to amount of free time.
In order for me to reach my targets I am going to do 2 sessions a week
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.