Solute concentration

19/12 Solute Concentration of Potatoes Block 2-2 Purpose: To determine the concentration of solute in the potato’s cytoplasm by measuring the change in mass after the process of osmosis. Materials and Equipment: Refer to Biology 12 Lab Manual – Investigation 13 Procedure: Refer to Biology 12 Lab Manual – Investigation 13 Data and Observations: The Potatoes change in mass after the process of Osmosis Test Tube # | Concentration of Sucrose

meaning that the solutes dissolve in water (solvent). Water may cross voluntarily through the membrane by osmosis. Most ions move through protein channels, while transport proteins import larger molecules like carbohydrates. The simplest form of movement is diffusion, where solutes move from an area of high concentration to low concentration. Diffusion is directly related to molecular kinetic energy, taking in no energy input. The movement of a solute from an area of low concentration to high concentration

Running head: THE CONCENTRATION OF The Concentration of Solutes affects the Rate of Osmosis Chintan Jani Biology 101-01 Dr. Reynolds October 6, 2016 Abstract The purpose of this lab was to observe the osmosis rates and mass changes of dialysis tubes. To this three-dialysis tubes with differing sucrose levels were tested on their rate of osmosis and weighed at 15-minute intervals. The results found described that as the sucrose level increases the rate of osmosis increased as well. Introduction

INTRODUCTION Osmosis is the movement of water molecules from high concentration to low concentration through semipermeable membranes, caused by the difference in concentrations on the two sides of a membrane (Rbowen, L.). It occurs in both animals and plants cells. In human bodies, the process of osmosis is primarily found in the kidneys, in the glomerulus. In plants, osmosis is carried out everywhere within the cells of the plant (World Book, 1997). This can be shown by an experiment with potato

Colorimeter A colorimeter is a piece of equipment that is used to measure the concentration of dilute solutions (intensity of light). The colorimeter is mainly used to determine the concentration of a known solute (chemical that is placed into a solvent and dissolved) in a given solution by using Beer-Lambert’s Law which states that the concentration of a solute is proportional to the absorbance. According to Beer’s law, “when monochromatic light passes through the coloured solution, the amount

OSMOTIC DRYING Introduction Osmosis is the movement of fluid from a low solute concentration to a high solute concentration through a permeable membrane. Small solutes such as water and ion molecules can pass through the membrane easily whereas bigger solutes such as polar molecules are not able to pass through the membrane (Bitesize, 2014). Osmosis is the suitable and preferred method to preserve the food quality before the final treatment such as drying or freezing because it retains the fruit’s

of investigation: The effect of solute concentration on osmosis in potatoes. Research question: What is the solute concentration of a potato? Hypothesis: Osmosis is the movement of water across the membrane from an area of high concentration to an area of low concentration. The osmosis continues until the solute concentrations are equal in both areas. In this experiment, we put pieces of potatoes into test tubes with sugar solutions of different concentrations and leave them there over night.

the Concentration of a Solute Affect the Rate of Osmosis BY: Kevin Liu, Prabhat Aluri, Sriram Thothathri, Edward An Question: How does the concentration of a solute affect the rate of osmosis? Hypothesis: The concentration of a solute affects the rate of osmosis over time, in a way where, the higher the concentration of a solute, the faster the rate of osmosis. This happens because, in a semi-permeable membrane the water is the only through that can move through. In this case our solute is sugar

Estimation of the Osmolarity of Potato Cores Research Question: How do different concentrations of sucrose solutions (0M, 0.2M, 0.4M, 0.6M, 0.8M, 1M) affect the mass of potato cores when in sucrose solution? Background information: Osmosis is the diffusion of water across a membrane to create an equilibrium between the levels of concentration of a solute both inside and outside the cell. In this case the solute will be sugar as the potato core will be immersed in sucrose solution. There are 3

Objective: The overall purpose of this experiment is to determine how solute concentration, particle size, and a membrane’s selective permeability affect the occurrence of diffusion. Hypothesis: In exercise one, as potassium permanganate’s molecular mass (158.03 g/mol) being less than half that of methylene blue (319.85 g/mol), KMnO4 is expected to further diffuse in the agar plate due to the negative correlation associated with particle size and rate of diffusion rate with a semipermeable membrane