The purpose of this lab was to observe the rate of osmosis and diffusion‚ as well as the effect of molecular size of the particles on this rate. Part I of the lab was a demonstration of osmosis and diffusion‚ that dealt with raisins in different liquid environments‚ each with a different concentration of sugar. Part IV of the lab was using the same idea as the demonstration‚ by putting objects in different concentrations of a substance; in this case elodea leaves in salt water. In both cases‚ the
Premium Chemistry Water Concentration
The effect of size on the effectiveness of diffusion Aim: To use agar blocks infused with 0.1 Molar sodium hydroxide (NaOH) and phenolphthalein to investigate the relationship between shape and surface area: volume ratio on the effectiveness of diffusion. Hypothesis: That for a cube of agar‚ the time taken for complete colourisation due to diffusion of HCl is directly proportional to the cubes volume. Materials: |A block of agar (10cm x 5cm x 3cm) with 0.1M NaOH and |1x 250mL
Premium Volume Sodium hydroxide Orders of magnitude
“What factors contribute to infant mortality in developed and less developed countries?” “Infant mortality is the number of deaths among live-born infants from birth to under age one” (Sidscenter.org‚ n.d.). According to a National Vital Statistics Report in 2006‚ the leading causes of Infant Mortality in the U.S. were deformities‚ low birth weight‚ Sudden Infant Death Syndrome‚ maternal complications‚ unintentional injuries‚ respiratory distress of the newborn‚ bacterial sepsis‚ neonatal
Premium Infant mortality Infant Developed country
Introduction: Diffusion and osmosis are passive processes of transport. Passive transport involves no disbursement of energy by the cell. Diffusion movement is from high concentration to low concentration‚ which the driving force for this type of movement is kinetic energy particles themselves. Which crystal (Methylene blue‚ solid or Potassium Permanganate KMnO4-purple) will move further than the other due to the driving force (kinetic energy)? My prediction is that Potassium Permanganate KMnO4-
Premium Diffusion Molecular diffusion Osmosis
Diffusion is the molecular net movement from a higher concentration to a lower concentration. For instance‚ when a person is smoking‚ the smoke diffuses into the air. The molecules in the smoke‚ released from the cigarette‚ travel through the air. Here is how it occurs. When molecules are close enough‚ they collide with each other‚ their kinetic energy changes. Due to the direct relationship between diffusion and molecular kinetic energy‚ the molecules move away from the point of the collision as
Premium Osmosis Concentration Chemistry
indicate a substantial gap between the espoused environmental attitudes of business leaders and the actual practices of their companies. The primary purpose in writing this paper is to investigate problems and prospects concerning Corporate Social Responsibility‚ and discuss: (1) Business Interaction with Society‚ (2) Accountability and Transparency‚ (3) Environmental Issues and Financial Statements‚ (4) Financial Markets and Social or
Premium Sustainability Environment Social responsibility
Where as the active transport requires energy from the molecule to be moved. oFacilitated diffusion can only move in one direction from high concentration to low concentration‚ which is with the gradient. Where the active transport can move from both low concentrations to high concentrations‚ therefore it can move against the gradient where as the facilitated diffusion can not. The process of active transportation is when a molecule work together with the active side of a protein
Premium Cell Organelle Eukaryote
Lab 1: Diffusion & Osmosis 9/16/14-9/19/14; Jessica Bullock‚ Andrew Buchholz‚ Kristamae Masiclat TITLE: Different Ways to Express Diffusion and Osmosis INTRODUCTION: Diffusion is the spontaneous movement of a substance down its concentration gradient‚ from a region where it is more concentrated to a region where it is less concentrated. Osmosis is the diffusion of water across a selectively permeable membrane. The objective of this lab is to observe the different effects of diffusion and osmosis
Premium Osmosis Diffusion Chemistry
Introduction In Diffusion‚ Dialysis & Osmosis lab‚ we discovered that we were going to observe and understand the conditions under which diffusion‚ dialysis‚ and osmosis occur. Then we constructed models of diffusion‚ dialysis‚ and osmosis. We predicted that the direction of change would be from the membrane to the beaker. We understood how these processes affected the selectivity of the cell membrane. The second part of the lab was dealing with dialysis. In this part we studied starch and sodium
Premium Sodium chloride Iodine Salt
How are Attitudes Developed and Fostered? Taza Potter Western International University Social Psychology—BEH 311 Jonas Cavileer‚ Instructor August 12‚ 2009 How are Attitudes Developed and Cultivated? Introductory Attitudes are defined as “evaluation of various aspects of the social world” (Baron‚ Branscombe‚ & Byrne‚ 2008). The real question is how are they developed and cultivated? In this paper we are going to look into the social aspect of how attitudes come about‚ persuasion
Premium Management Psychology Strategic management