Reverse osmosis

Destiny Mckenzie Teresa Elam, Emily Meyers,Carlee Brogdon The Replication of Osmosis in Cells Introduction: The differences between osmosis and diffusion is slight, but osmosis is the movement of water molecules from high concentration to low concentration, when diffusion is necessarily the same concept albeit without water molecules.Osmosis and Diffusion occur to achieve equilibrium in the cell; to maintain the cell’s homeostasis.Within the experiment two types of solutions were present:…

Catherine Delker Honors Chemistry – Yellow Blue Beaker Experiment Lab Report 8/20/15 Blue Bottle Experiment Problem: The purpose of this lab was to determine the oxidation rate of the Methylene blue solution when tested with varying amounts of solution. Background: The Blue Bottle Experiment is a classic demonstration of a Reversible oxidation-reduction reaction with an alkaline solution of glucose that acts as a reducing agent. It is known that, “Methylene blue speeds up the reaction,…

Sofya Tkachman AP Biology, A2 Dr. Lau 15 September, 2015 Enzyme Catalysis I. Purpose Measure the activity of catalase in potato extract using several different methods. II. Procedure a) Cut 20 small circles from a large filter paper disk using a hole puncher. Clean and dry several medicine cups and pour hydrogen peroxide into one. Put the catalase enzyme, previously prepared by blending a potato, into another medicine cup. Make a 1/8 dilution of the catalase by adding chilled distilled water.…

Homeostasis is defined as keeping the variables and conditions of a system constant and regulating the internal conditions. In a biological system at the cellular level, this can be defined as the process of maintaining stable conditions inside a cell, such as a normal pH, salinity, and ion concentration, to keep the cell healthy. There are several parts of the cell that play a role in homeostasis, but one of the more prominent ones is the phospholipid bilayer membrane. The cell membrane…

Objective: The objective of this lab is to show how diffusion occurs with different types of osmosis. This is done with varying concentrations of solute. Introduction: To fully understand this experiment you should have a solid basis of background information on a few a topics. The cell membrane, for example, is the flexible barrier which surrounds the cell (see Figure 1). This organelle controls what is able to enter and exit the cell, which is known as selective permeability. The…

membrane, and this process can occur in two ways; passive transport and active transport. Passive transport allows substances to cross the membrane without any use of energy, and this includes simple diffusion, facilitated diffusion, filtration, and osmosis. Active transport however, requires the use of ATP, or energy, to move across the membrane. Diffusion is the movement of…

The water inside the cell is hypotonic because it has less of the solute (alcohol). The solution in the cell's environment has a higher concentration than the inside of the cell which means that is hypertonic. This means that diffusion of water (osmosis) will occur. The water inside the cell would diffuse to the outside of the cell when there is a higher concentration of alcohol because there is a lower concentration of water outside the cell. The water would diffuse because water diffuses…

In this experiment, we set out to determine the osmolarity of a potato. In order to do this, we placed potato pieces in seven different solutions of varying sucrose molarity. First, we weighed each potato piece to obtain the initial weight, shown in Figure 1. Then, we split the pieces vertically before placing them in the cubs containing the sucrose solutions. In each cup was a solution of sucrose with a molarity ranging from 0.0M to 0.6M. After placing the potatoes in the cups, we allowed them…

Emma Kilgore Science Period 2 January 12, 2016 The Evaporation of Liquids When a liquid is left in a warm car over a certain period of time some people might notice that the liquid seems to have lessened. This is because of evaporation, evaporation is when a liquid changes into a gas because of an increase in temperature or pressure. This brings up many questions having to do with liquids and evaporation so, do all liquids take the same amount of time to evaporate?…

Abstract: Using the PhysioEx.9.1 software, I ran Activity 4: Simulating Filtration lab to learn about the filtration of solutes in a membrane system. This experiment was conducted using four solutes: NaCl, urea, glucose, and powdered charcoal. The goal was to learn if any of these solutes passed through the three different dialysis membranes at varying pressures. Does increasing the pore size increase filtration rate? What effect will pressure have on the filtration rate? These are the…