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    Plasmolysis and Osmosis

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    Razelle Icaro- Resub Plants absorb water from the soil via osmosis. Osmosis is the diffusion of water particles from a region of high concentration to a region of low concentration across a semi-permeable membrane until the concentration is equilibrium. There are usually more solvents in the water inside the plant which means there is a high concentration. Because of this‚ the water flows into the root hair cells from the soil. Watering plants with a saline solution (salty water) changes the osmotic

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    and three would support the initial rationale hypothesis that if salt concentration is not equal to the optimum concentration of 0.15M‚ then its ability to function will decrease. 0.15M with the trypsin added had the lowest absorbency compared to the three other concentrated groups that were tested (0.0M‚ 0.075M‚ 0.30M). Closer comparison that if you take the results obtained from trial one with trypsin at a salt concentration of 0.075M‚ the absorbance was 0.165 (440 nm wavelength). In comparison

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    Osmosis in Potato Chips

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    Biology GCSE Coursework: Osmosis in Potato Chips Skill Area P: Planning Aim: To investigate the effect of varying concentration of a certain sugar solution on the amount of osmotic activity between the solution and a potato chip of a given size. Hypothesis: Osmosis is defined as the net movement of water or any other solution’s molecules from a region in which they are highly concentrated to a region in which they are less concentrated. This movement must take place across a partially

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    Potato Osmosis Lab

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    from an area of low concentration to an area of high concentration. Osmosis was discovered by René Joachim Henri Dutrochet in 1826. Dutrochet’s research on osmosis and diffusion attracted a lot of attention to the public. He observed “that certain organic membranes allow the passage of water but stop the molecules dissolved in it” (Encyclopedia.com‚ 2008). He noticed that between two solutions of different concentrations in a membrane‚ water passes from an area of low concentration to an area of higher

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    others. For this molecular movement‚ there are two results that might happen. Diffusion is one of them. Diffusion is the movement of molecules that between the high concentration and the low concentration‚ during the molecules move randomly‚ the molecules which are in the high concentration are tending to move into the low concentration. On the other hand‚ osmosis is another result of the molecular movement. Osmosis is one type of diffusion that especially happens for the water molecules move across

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    diffusion and osmosis. This report was written to explain and present the results gathered in a precise and organized manner. This experiment was divided into two parts. The first part concentrated on the placing potato cylinders in different sucrose concentrations for a period of time. This part was conducted to see if the potato cylinders would gain weight or lose weight because of osmosis. The second part was conducted to see if a dialysis bag‚ filled with sodium sulfate and starch solution and placed

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    pg.2 WATER FLOW ACROSS CELL MEMBRANES The movement of water across semi-permeable membranes as it relates to the laws of thermodynamics and energy flow with the diffusion of molecules down a concentration gradient of various solute concentrations‚ observing microscopically viewed outcomes‚ and spectrophotometrically measured results. ABSTRACT This experiment will identify the movement and exchange of water through semipermeable membranes and the recognizable amount

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    References

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    absorbance level is 400 to 600 those are in nanometer unit‚ in this experiment the wavelength to used is 470‚ 500‚ 530‚ 560‚ 620‚ 650‚ 680 nanometer. Measures the absorption of light by spectrophotometer with a specific wavelength used to determine the concentration of the pigments or solution. Figure 1.1 shows the schematic diagram of the spectrophotometer. The instrument show the content of the light source which is come from the light source of a spectrophotometer. The arrow as in the Figure

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    Chem June Exam outline

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    Chemistry June Exam Notes Quantities in Chemical Reactions  Molecular and formula mass o The mass of one unit of a compound (a molecule or a formula unit) o The sum of the mass of all the atoms in a compound o With knowledge of the mass of each individual atom‚ the percentage composition by mass can be determined  The Mole (mol) o A counting unit‚ one mole refers to 6.02 x 1023 particles of any given substance o Known as Avogadro’s Constant and given the symbol NA  Molar Mass o The

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    Enzyme Lab Report

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    Influence of Concentration on the Activity of Amylase Title Influence of Concentration on the Activity of Amylase Abstract Does more or less concentration speed up the reaction rate of amylase in starch? In this experiment diluted solutions of amylase were created and then tested using a starch solution‚ I2KI for reaction times. The answer to the question was proved to be that more concentration of amylase speeds up the reaction time. Introduction The enzyme‚ amylase is found in

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