The Effect of Different Concentrations of Salt Solution on Potato Tissue
My preliminary work involves me preparing for my actual experiment. I
will do the experiment and record my findings; however it is merely a
practice for the real thing. This will allow me to correct any
mistakes that I may make in this task and allow me to change them, if
needed, in the forthcoming project.
Apparatus list for my preliminary investigation:
* Cork borer.
* Potato,
* Salt solution (0 – 100% solution),
* Distilled Water,
* Ruler,
* Knife,
* Beakers (100ml capacity),
* Stop watch,
* Tile (for cutting the potato on),
* Measuring Cylinder,
Solutions I will be using for my preliminary work:
* 0.2 molar salt solution – 20ml salt solution and 80ml of distilled
water.
* 0.4 molar salt solution – 40ml salt solution and 60ml of distilled
water.
* 0.6 molar salt solution – 60ml salt solution and 40ml of distilled
water.
* 0.8 molar salt solution – 80ml salt solution and 20ml of distilled
water.
* 1.0 molar salt solution – 100ml salt solution and 0ml of distilled
water.
I left the potato pieces, all near enough equal sizes, over the
weekend in the solutions of salt. I recorded the general findings
only. The more accurate and detailed measurements would be documented
in the actual experiment. As already discussed the preliminary work
was only for organizational purposes.
This is what I noticed from my preliminary experiment:
* The stronger the salt solution (more salt), the lighter the weight
of the potato.
* The weaker the salt solution (less salt), the heavier the weight
* Note the mass down in the table at the end of the first page.
...lized that there were many mistakes that I needed to fix in order to perfect my writing. I need to consider more about focusing on the topic and organizing for my writing, because it appeals to the audience more clear to the point. Also, I feel that I am much better to convince my audience through my writings.
Investigate the Osmosis of Potato Cells in Various Salt Solutions. Introduction I have been asked to investigate the effect of changing the concentration of a solution on the movement of water into and out of potato cells. I will be able to change the input of my experiment. The input variable is the concentration of the solution.
there would be no flow of water into or out of the cell so the cell
Make sure you explain how to seek honest feedback to ensure that you learned from the failure.
If we put the potatoes in different concentrations of seawater (0%, .4%, .8%, 1.2%, 1.6%, and 2%) then the potato put in the highest concentration of seawater (2%) will begin to discolor and fall apart while the potato put in the lowest (0%) concentration of seawater won’t discolor and fall apart because the seawater with the 2% concentration will diffuse into the potato causing it to break down and discolor faster than the potato in the lower concentration of seawater.
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.
1. Be careful with subject/verb agreement. If you have a single subject make sure that you use a single verb and if you have plural subjects make sure that you use plural verbs.
When I am not using them I will place them away from my experiment and
Influence of Temperature on the Activity of Potato Catalase Hypothesis That the higher the temperature the higher the reaction rate of potato catalyse to a point were denaturing occurs in the enzyme and the reaction rate of the potato catalase drops off. Prediction The rate of Catalase activity will be faster at higher temperatures until a point, because at higher temperatures there are more chances of collisions between the enzyme's (Catalase) active site and the substrate (hydrogen peroxide). However the rate depends on the active site being able to join with the substrate, and at higher temperatures the enzyme can be denatured, which changes the shape of the active site which thus prevents the reaction from happening. At first, as the temperature increases the activity of the Potato catalase also increases this is because the collision rate of the enzyme with the hydrogen peroxide is increased.
Investigating the Effects of Different Concentrations of Sucrose Solution on Potato Cells Aim: to investigate the different effects of various concentrations of sucrose solution on potato cells. Introduction: Osmosis is a special type of diffusion. Osmosis happens when two solutions of different concentrations are separated by a selectively permeable membrane. A selectively permeable membrane has holes in it which are just big enough for water molecules to pass through, but not the much larger sugar molecules. Water moves across the membrane from a weak solution (high concentration of water molecules) to a stronger solution (lower concentration of water molecules).
Determining the Concentration of the Cell Sap in Potato Storage Tissue Aim: To determine the concentration of the cell sap in potato storage tissue. By using Osmosis, determine what the sugar concentration of cell sap is. Prediction I predict that the potato segment in the distilled water will definitely gain in weight because the solution outside it has a much higher concentration of water then in the cell sap meaning Osmosis will occur and the potato segment take in water. I predict that 0.2M sugar solution will also gain weight because it still has quite a high concentration of water outside the potato. The potato in the 0.4M solution will gain weight but the potato in the 0.6M and 0.8M solutions will lose weight.
water in the potato, then the water will go out of the potato and into
with 0.0M (distilled water) and go up by 0.1M until I reach 1.0M and I
An Experiment to Investigate Osmosis in Plant Tissue. Aim: To conduct an investigation to compare the osmotic behavior of the osmotic animal. two types of plant tissue in varying concentrations of sucrose. solution. Then we can find the solution.