Osmosis coursework Aim: To investigate the effect of different concentration of a sugar solution on the amount of osmotic activity between the solution and pear pieces of a given size. Define osmosis: Osmosis is a net movement of water/ solution molecules from a region of high concentrated area to a region of lower concentrated area through a semi-permeable membrane which lets smaller molecules such as water through but does not allot bigger molecules like glucose to pass through. The molecules
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UNKNOWN LAB REPORT UNKNOWN NUMBER 54 Ron Williams 7-28-05 Bio 205 Prof. Curlee Fall 2005 Purpose There are many reasons for knowing the identity of microorganisms. The reasons range from the knowing the causative agent of a disease in a patient‚ so as to know how it can be treated‚ to knowing the correct microorganism to be used for making certain foods or antibiotics. This study was done by applying all of the methods that have been learned so far in the microbiology laboratory
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Results The relative osmotic concentration was determined by measuring the percent change in mass of the potato tissues. Change in mass was measured of six solutions‚ each containing different levels of concentration (0‚ 0.1‚ 0.2‚ 0.3‚ 0.4‚ and 0.5). The percent change in mass decreased as sucrose concentration increased‚ therefore‚ relative osmotic concentration also decreased as sucrose concentration increased. However‚ the osmotic concentration of 0.2 M sucrose solution was relatively greater than
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11. Then add the benedict’s solution to the sucrose beaker. Put water in the 400ml beaker‚ and put it on the hotplate to start to boil the water. 12. Then stand the test tubes in boiling water for a few minutes. 13. A color change through green to yellow‚ brown and finally to red indicates the presence of reducing sugar. 14. Repeat 3 times‚ washing the materials each time you finish one cycle 15. Then you have our standard for have a standard for the rest of the experiment. 16. Then you have a standard
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find out the concentration of the sulphuric acid in my experiment. I will do this by titrating the sulphuric acid with sodium carbonate. H2SO4 + Na2CO3 à Na2SO4 + H2O + CO2 Acid + Alkali à Salt + Water + Carbon dioxide Ratio of sulphuric acid to sodium carbonate: H2SO4 : Na2CO3 1 : 1 Concentration of sulphuric acid: H2SO4 is approximately 0.05 - 0.15 moldm-3 The average concentration of the sulphuric acid is: 0.05 + 0.15 = 0.1 moldm-3 2 Concentration (moldm-3) = concentration (g dm-3) Molar
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State the principle of triple beam balance A beam balance measures mass as opposed to weight‚ so the mass you weigh will be the same on the moon as it is on earth. Gravity is taken out of the equation‚ unlike a spring balance that measures weight and would measure an article to be 1/6 of the weight on the moon as it would be on earth using the same spring balance that relied on gravity. The principle is that of moment‚ or turning force/torque)‚ calculated by force x distance. Fundamentally‚
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Week 2 Activity – Meal Purchase TCO #2– Given a simple business problem‚ design a solution algorithm that uses arithmetic expressions and built-in functions. Assignment: Your goal is to solve the following simple programming exercise. You have been contracted by a local restaurant to design an algorithm determining the total meal charges. The algorithm should ask the user for the total food purchase and the tip percent. Then‚ the algorithm will calculate the amount of a tip‚ a 7% sales
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amount of sucrose in the dialysis bag affected the amount of mass each bag loss or obtains. All the tubes contained different amount of sucrose concentrations. The higher molarity concentrations increased the movement of water to balance out the inside of the tube and the beaker. The greater amount of concentration gradient‚ in each tube‚ increased the rate of osmosis. This rate of osmosis is due to the net movement of water from an area of low concentration to an area of high concentration. Because
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10.2 Determining the Concentration of Ammonia in Window Cleaner Solution Design (D) Aim To determine the concentration of ammonia‚ NH3‚ in the commercial window cleaner solution Background Window cleaner contains ammonia‚ NH3‚ a weak base‚ which helps remove dirt from glassware. The concentration of ammonia in the window cleaner solution varies by brands. Titrating the window cleaner solution with an acid of known concentration allows us to calculate the concentration of the ammonia in that
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In a brief essay‚ identify at least two of the implications implicit in the society reflected in the poem. Support your statements by specific references to the poem. The Unknown Citizen Comment [ANn1]: OK‚ so I need to IDENTIFY two implications implicit in the society. I need to make sure I’m speaking only to the society reflected IN the poem. I’ll make sure to quote the poem itself. by W. H. Auden (To JS/07 M 378 This Marble Monument Is Erected by the State) He was found by the
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