Osmosis Reports Samples For Students

Osmosis is the random diffusion of solvent water molecule from an area of low solute concentration to areas where the solute concentration is high through a semi permeable membrane so as to equalize the concentration of the solute on both sides (Kylstra, Longmuir, and Grace 289). It is a biological process essential to both flora and fauna that results into various physiological effects, for this experiment water and a mixture of syrup and water will be used to demonstrate the process. A laboratory report hence illustrates what the students involved, understood while carrying out the practical experiments.
The purpose of the ...

Simulation of osmosis across the cell membrane using dialysis bags models to measure the direction and the rate of osmosis

Osmosis refers to the process by which the cells exchange their water content with their surroundings (Beckett, 1986). The process is passive just like diffusion only that osmosis involves water only. The water molecules move from a where their concentration is high to a where their concentration is low, through a membrane that is semi-permeable. The permeable membrane only allows water molecules are other small molecules to pass while preventing large and other charged molecules from passing. The pressure that is exerted by the molecules of water that are freely moving in a system is known as the water potential (Kent, 2000).
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A solution with a higher solute concentration than a cell is known as hypertonic solution. A solution of lower solute solution than the cell is known as hypotonic solution and of similar concentration isotonic solution. Osmosis refers to the phenomenon whereby solution moves from a hypotonic area, across a membrane with selective permeability, to a hypertonic area. The selective membrane refers to membranes that prevents one substance from passing through but allows another. In most cases, the biological membranes are permeable to water and impermeable to solutes such as sugars and ions. The cells have an ability of regulating their internal water and salt ...

Aims

1. To observe and investigate the effects of osmosis across the cell membranes of a plant.
2. To investigate the ability of different molecules to diffuse across a selectively permeable membrane.

Introduction

All living cells are enclosed by an outer covering known as plasma or cell membranes. In addition, these plasma membranes serve as barriers between different compartments in the body to confine processes and materials to certain locations. Examples of these processes are diffusion and osmosis which are the main physiological processes that play important roles in the body. Diffusion can be defined as the process by which molecules move ...

Abstract

Water is an important chemical owing to its various uses by living things. Most chemical reactions within the bodied of living things require water in order to occur. It is purported that life evolved from water some 3.8 billion year ago following the organization of inorganic and organic molecule to form as prokaryotic cells. Besides, the well being of a cell is overly dependent of the balance between the water and the dissolved substances in the water. In this regards, the cell can permit water molecules to move in and out of the cell; the process in called Osmosis.

Introduction

In ...

Introduction

The cell membrane encloses the cell contents and regulates what gets in and out of the cell. This property of a cell is referred to as selective permeability and helps in maintaining life processes (Beckett 22). The property enables physiological process such as diffusion and osmosis to proceed.
Diffusion is the movement of particles from a region of high concentration to a region of low concentration (Roberts and Mitchelmore 38). In a cell membrane, the molecules will diffuse from the side where the molecules are more to a region where they are less. Because of selective permeability, only molecules ...

- Introduction
With water being an essential component necessary to many aspects of domestic life, it also represents an integral component in many industries. Due to water’s inherent solvent properties, water extracted directly form freshwater sources such as lakes, rivers, and aquifers are often times full of absorbed minerals and pollutants unfit for human consumption. Due to this, a variety of methods have been implemented in order to purify water from surface and sub-surface sources. However, the world’s water sources vary greatly in purity to begin with, which results in some methods being much more labor intensive ...

Introduction

Selective permeability is a function and a feature of the cell membrane, which is crucial to regulate homeostasis. According to Turksen (132), the plasma membrane function by controlling specific passing of some substances and at the same time hinders entry of some substances into the cell. As high school students, we were curious of a cell membrane could do this function. We, therefore, performed an experiment to test how a chicken eggshell membrane could allow some substances to pass through it while hinders the passage of some substances. We dissolved the eggshell in vinegar. After a thorough reading, the book by Turksen (143), we ...

Abstract

Application of the nanofiltration (NF) and ultrafiltration (UF) processes is applied in the handling of water that is produced raw. The application has been investigated in the current day through various studies (Wang 14). The experiment of the processes of both nanofiltration and ultrafiltration is conducted in the laboratory unit which is operated in a pattern of cross flow (Ashaghi, Ebrahimi, & Czermak, 46). The study that was conducted in Oilfield of North Sea using the process of membranes of ultrafiltration (UF) and microfiltration (MF) indicated that the content of hydrocarbon decreased from 50 mg/l to 2 mg/l which recorded ...

Introduction

Osmosis refers to the net water movement across a membrane, which is selectively permeable and the movement is driven by a difference in the concentration of the solutes on the opposite sides of the membrane. A selectively permeable membrane allows water to pass through without allowing ions or solute molecules to pass through. Other small molecules that are not charged are also allowed to pass through the membrane. Diffusion, on the other hand, refers to the movement of molecules in a random motion as a result of the kinetic energy and causes the molecules to have a net movement from areas where the particles ...

Uranium (U) element was discovered by a German chemist, Heinrich Klaproth, in 1789. Uranium is a radioactive element with an atomic weight of 238.02891 and an atomic number of 92. The uranium element initially discovered by Heinrich was an oxide, uranium oxide. A French chemist, Eugène-Melchoir Péligot, was the first person to produce pure uranium by reacting it with potassium in a heated platinum crucible. The element’s radioactive properties were established in 1896 by a French physicist known as Antoine Henri Becquerel. Currently, uranium can be extracted from various ores such as carnotite (K2(UO2)2VO4· ...

Abstract

The paper is aimed at the research of the water provision issue in a region of developing world in order to suggest solutions. India was chosen for the completion of assignment, because it as the developing country is characterized by a free market, low standards of democratic governance, human rights guarantees, the active development of social programs and industrialization. Being the second largest country in the world by population, India has faced significant water scarcity problems. The proper statistics was provided to support risk worsening. Two methods of water provision, namely waste water treatment and desalination of sea water, ...

Introduction

This is well documented that the chemical composition of water affects the taste, color, odor, and so forth. Some of these salts also pose a threat to human health. The chemical composition of water is based on different dissolved solids. Total dissolved solids are referred to matters in tap water or water bodies that left in a container as residue after evaporation and drying of a water sample. WHO and EPA recommended that it should be below 500 mg/L (Broséus et al., 2009; EPA, 2013).

Classification of Dissolved Solids

The dissolved solids comprised of various salt contents present in the water as well as other ...

Introduction

Osmosis is the process by which water molecules move from a region of low concentration of solute to a region of high concentration of solute through a semipermeable membrane (Van 3). Osmosis therefore can define the movement of water in and out of the cytoplasm of a cell. A solution with a higher concentration of solute molecules than that of the cell cytoplasm is said to be hypertonic to the cell. On the other hand, a solution with a lower concentration of solute than that of the cell cytoplasm is said to be hypotonic to the cell.
Purpose: The ...

Report on Arsenic-Free Water Filters

Introduction

Arsenic concentration in water varies depending on the source. This report is based on the discussion of the measures of reducing the levels of arsenic in the tube-well water. In this case, three criterions are selected for the study. Each of the methods chosen will enumerate its merits and demerits that suit the application.

Problem

Arsenic is semi-metal element found in the periodic table. It is an odorless, tasteless element that occurs naturally in water, rocks and soils, air, plants and animals.
Arsenic poisoning from various water sources such as well present a significant problem across the globe. The ...

1.0 Introduction
Water is an important component of life and without it life on earth will be non-existent. About ¾ of this planet is made up of water and it is a surprise, therefore, to find out that more than a billion people do not have access to clean water. According to the United Nations, the uneven distribution of water is endangering an increasing number of people although there is enough water in the planet to supply its entire population (2014). This situation is particularly true in areas that are classified as arid regions or regions with precipitation characterized as low, ...

Analysis of Water Quality from the Rivers Colne, Holme and Calder Flowing through Huddersfield/Mirfield

Analysis of Water Quality from the Rivers Colne, Holme and Calder Flowing through Huddersfield/Mirfield

Introduction

It is a truism that water is a valuable resource. Rivers are among the major suppliers of freshwater resources for humans and other terrestrial organisms. Thus, without rivers humans could not have survived. The importance of river systems has been elucidated even during the rise of the Egyptian Civilization. The Nile River for instance has provided humans with food, drink, fertile soil and even a site for settlement (Hassan and Al Rasheedy, 2007). The ecosystem services that the river provide to people since time immemorial include water supply ...

Summer 2013

Abstract
Reliable techniques to meet the needs of patients with peripheral nerve repair injuries need to be refined. One of the strategies often used is to create a nerve guidance channel or build a nerve conduit Silicone is has been found to work well as a conduit from an injury for regenerated axon cells if it does not contain foreign components. The cycle of the cleaning treatment was repeated until the Pentane-Acetone-Heat Procedure was successful and the plated cells survived for several weeks. The duration of the plating and cell count using the cleaned silicone lasted from May 3, 2013 to ...