process of distillation. Distillation is the separation of volatile substances mixed with nonvolatile substances by boiling the mixture to alter the phase of the volatile substance. The researchers used the simple distillation set up to conduct the experiment. 25 ml of The Bar Vodka was used and 7 ml of distillate was collected before a temperature of 95 degrees Celsius was reached. Collected distillate was then subjected to a flammability test to confirm ethanol content. The percent ethanol was computed
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the concentration in the potato cubes‚ the percentage of weight change in potato cubes will be higher (positive). If the concentration of the salt solution is the same as the concentration in the cell‚ there will be no net movement of water through osmosis therefore there will be no percentage of weight change in potato cubes 2) The osmolarity of salt within the potato cubes lie between 0.8% and 1.0%. Thus saying‚ solutions of salt ranging from 0.0%(distilled water) to 0.8% will be hypotonic while the
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Akram Mohamed Professor Michael Zeugin English 102 9 April 2015 A Raisin in the Sun Each individual possesses a unique idea and mental image of their future. Victor Hugo once said‚ “There is nothing like dream to create the future”. Langston Hughes quotes in his poem‚ “What happens to a dream deferred”‚ “Does it dry up like a raisin in the sun … or does it explode?” Lorraine Hansberry derives the title of her play from this poem. Dreams are vital regardless of the various oppressive struggles one
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Osmosis Lab: Potatoes and Elodea Background Information: Cells have a need to regulate their internal environment. They need to be able to this because cells often find themselves in environments where the concentration of dissolved solids outside the cell is different from the number of dissolved solids inside the cell. Since the solids can not move across the membrane‚ the cell responds by moving water either into or out of the cell in an attempt to balance the number dissolved particles.
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Osmosis is the diffusion of water molecules from an area of high concentration of sucrose solution to an area of lower concentration of sucrose solution‚ through a selectively permeable membrane. The water molecules move down a concentration gradient in osmosis. Two diagrams of osmosis are shown in figures 1 and 2. Figure 1 shows the diffusion of water molecules through a selectively permeable membrane from an area of highly concentrated sucrose solution to an area of lower concentrated sucrose solution
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Osmosis of a Potato cell. Hypothesis is that the potato in saltwater is going to show that it will break down the cells of the potato. Osmosis is the diffusion of a solvent through a semi-permeable membrane‚ from a solution of low solute concentration to a solution with high solute concentration‚ up a solute concentration gradient. Net movement of solvent is from the less-concentrated to the more-concentreated.‚ which tends to redure the difference in concentrations. This effect can be countered
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Lab # 2 Diffusion & Osmosis Introduction Kinetic energy‚ a root of energy stored in cells‚ causes molecules to hit into each other and move in new directions. Diffusion is the result of this contact. Diffusion is the random movement of molecules to an area of lower concentration from an area of higher concentration. Osmosis is a type of diffusion. This is the diffusion of water through a selectively permeable membrane from a region of higher water potential to a region of lower water
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Rate of Osmosis Investigation Lab Title: A simple heading referring to your investigation Abstract: Write this section last! It is a brief paragraph or 2 which outlines the purpose‚ the method‚ the pattern of results and the conclusion you reached. It is an overall snapshot of the whole investigation. Introduction: Purpose: Biological Background: All living organisms are made of cells which are surrounded by a membrane. The cell membrane has many functions but the
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Conflict in A Raisin in the Sun In the play A Raisin in the Sun‚ the playwright Lorraine Hansberry depicts the life of an impoverished African American family living on the south side of Chicago. The Youngers‚ living in a small apartment and having dreams larger than the world in which the live‚ often use verbal abuse as a way to vent their problems. Many times‚ this verbal abuse leads to unnecessary conflict within the family. The most frequently depicted conflict is that between Walter and
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Aim: The aim of this experiment is to investigate the movement of water into and out of plant cells by osmosis. The cells chosen for study will be taken from potato tubes as they provide a ready supply of homogeneous material. I did the investigation in two parts‚ the first part of my investigation was my preliminary investigation and then I did my official investigation. In both of my investigations there are several similarities‚ such as fair testing‚ variables‚ key variables‚ reliability
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