Part A: Osmosis practical task Aim: To observe the effects of osmosis in rhubarb cells. Hypothesis: Water will be extracted out of the cells in the salt solution causing the cells to look different to the cells in the freshwater solution. Materials: Rhubarb Distilled water in a dropping bottle Salt solution in a dropping bottle Microscope, slides, and coverslips Forceps and razor blades or scalpel Paper Towel Method: Clean and dry a slide and coverslip.
An experiment was conducted to determine the dissolved oxygen, phosphate and nitrate in Freshwater Creek on 22nd February 2016 at 10:46 am. The same tests were done by students previously however in this report only the recent 2 years results will be taken into consideration for comparing trends, anomalies and interrelationships. The recommended levels of dissolved oxygen saturation is 85%. The dissolved oxygen saturation last year was 85% at water temperature 22.9° and 2 years ago being 92% at water temperature being 23.1°. However this years it was recorded to be 80% at water temperature of 27.2° (see appendix 1 for the raw data table and calculations of Dissolved Oxygen).
In this lab, a chemical reaction between aluminum (Al) and hydrochloric acid (HCl) will occur. When aluminum is combined with hydrochloric acid, the chemical reaction will then produce elements of aluminum chloride(AlCl3) and hydrogen gas(H2). The balanced chemical equation for the reaction is 2Al+6HCl2AlCl3+3H2. The reaction produces 2 moles of aluminum chloride and 3 moles of hydrogen gas.
Diffusion and Osmosis Lab Report By: Jettica Williams BIOL 1107 Lab September 21, 2016 Prepared for Mrs. Fulford Lab Course Page Break The cell membrane act as a roadblock for cells. The cell membrane has a very hectic job. It restricts the access to what comes in and what goes out. The bond the membrane shares with others is the idea of accountability.
Osmosis and Diffusion: Osmosis is the diffusion of water molecules from a higher concentrated area of water to a lower concentrated
Eggs Being Observed Under Osmosis Using shell less or decalcified eggs and putting them under different solutions of water, it shows how osmosis (the movement of water from high to low concentrations) works inside a cell. These solutions will show how osmosis transfers water in different concentrations. IN addition to representing how osmosis works, this experiment will also show isotonic (balanced), hypotonic (bloated), and hypertonic (shrunken) conditions. The main hypotheses for this experiment involved sugar being absorbed through the egg membrane using diffusion when put into a sugary solution and water being absorbed through osmosis when put into a solution.
OSMOSIS The outcome in the increase of sucrose absorption in the mass of Chips November 27, 2017 Candidate number: ftp678 BIOLOGY IA SL Research Question: If the chips are put under water in a sucrose solution. , will their mass decrease in a certain concentration of sucrose solution? Hypothesis: The increase of volume of sucrose solution will affect the mass of the chips to decrease since the water will possibly transport itself out of the cells. The larger the absorption of sucrose solution, the lower the mass of the chips will become.
In hypertonic environments (where there are more solutes outside than inside the cell) cells will lose water. In hypotonic environments (where there are less solutes outside than inside the cell) the cell will gain water. When solute concentration is even both in and outside of the cell there is no water movement so the cell would be in an isotonic environment (Figure 1). Purpose The purpose of this experiment was to find the effect of sucrose solutions on osmosis.
The hypothesis for the different experiments is that with each of the different substances and mixtures will be different depending on what they are. II Equipment The late nite lab was used to conduct this experiment. The product used were a balance, a graduated cylinder, water, Ethanol, and unknown liquid, Iron and an unknown metal. III Procedure
In this experiment, it was observed how the amount of salinity in water affected the mixing of two types of water. During this experiment, two flasks were filled with water and then ten grams of salt and one drop of food coloring were added to one of the flasks. Then an index card was put onto the top of the flask with salt water to keep the water inside the flask and placed on top of the fresh water flask. The index card was then slid out and the two types of water solutions began to mix. This was repeated two more times, one with the fresh water on top and another with the flasks going horizontally.
Osmosis Lab Report Research Question: How does the change in the concentration of a sucrose solution affect the process of osmosis in a potato cell by measuring its mass? Background information: 1 Osmosis is the process by which a liquid passes through a semi-permeable membrane, moving from an area with a high concentration of water to a low concentration of water. There are various factors that affect osmosis such as: concentration, surface area and temperature. The concentration of solutions can affect the rate of osmosis, as there is more difference in the concentration of the solutions, which means osmosis, will take place quicker. Surface area could affect osmosis based on the ease by which molecules can get through the semi-permeable
We are going to weigh out the mass of the dry glassware, which will be a volumetric flask, and then the mass of the glassware with the water in it. After we measure the glassware with the water in it
There are many factors that can alter the osmosis rate such as the sizes of the particles and temperature, nonetheless, the factor that might alter the osmosis primarily in this experiment is the concentration of sucrose. Therefore, this laboratory is going to focus exclusively on the effect of the sucrose concentration on the osmosis rate. The higher the amount of sucrose, the higher the mass difference in the potatoes since the sugar is a hypertonic solution, meaning that there is a large amount of particles that will dissolve in the solution while the water, that is a hypotonic solution, will not dissolve as many as a hypertonic solution. When the potatoes are placed in the sucrose solutions where the potential of water is larger than that of the potato, the particles will most likely be drained from the potatoes into the sucrose. Consequently, the potato's weight will diminish.
Biology Design Practical Joshua Edwards What are effects of the volume of a potato and the amount of weight it loses when placed in salt solution? Introduction This design practical uses a potato’s surface area to volume ratio to see what affects it has on osmosis in different concentrations. Osmosis is the movement of water molecules through a cell membrane into an area of a higher solute concentration. The movement goes the way of the solvent with more solute because the lower solute concentration is drifting through balancing the ratio of solute per solvent (En.wikipedia.org, 2018).
Introduction: In this lab, of water in a hydrate, or a substance whose crystalline structure is bound to water molecules by weak bonds, is determined by heating up a small sample of it. By heating, the water of hydration, or bound water, is removed, leaving only what is called an anhydrous compound. Based on the percent water in the hydrate, it can be classified as one of three types: BaCl2O ⋅ 2H20, with a percent water of about 14.57%, CuSO4
