Plan a procedure that will allow you to compare quantitavely the glucose concentration in fresh samples of orange‚ lemon and grapefruit juice. Aim: The aim of this investigation is to produce a set of data which will enable comparison of the glucose concentrations of orange‚ lemon and grapefruit juice. Research: Benedict’s Reagent is a mixture of sodium compounds and copper sulphate. The copper ions are reduced by fructose (a reducing sugar) to form copper oxide‚ thus turning it from blue
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An investigation how sugar solutions of different concentrations affect osmosis. Research Osmosis is the diffusion of water across a partially permeable membrane from a dilute solution to one of a higher concentration. If a solution has a low concentration then the amount of (in the case of my investigation) sugar‚ the solute‚ will be low and the solution will be weak. If there is high amount of sugar then the solution will be concentrated (have a high concentration). When two solutions
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Here are a few tips on how to answer questions relating to case studies; 1)Read the case-study carefully: Case-studies will run up to many lines. So‚ do not think twice about spending time on reading the question. Read it the second time if you haven’t understood clearly. 2)Read the questions relating to the case: After a first time reading of the case study‚ reading the questions pertaining to it‚ will help you know what to look out for in the case. Underline these instances in the case study
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is a relationship between fluid intake and urine output‚ by measuring my daily fluid intakes and urine outputs. Hypothesis: The volume of urine I will produce will be at least half of the volume of fluids I will drink‚ due to the body’s ability to carry out a water balance just as one would have on oxygen‚ carbon dioxide to maintain a healthy and working body. For example if I drink 1000cm3 of fluids then the expected amount of urine I should produce would be around 4000 cm3 to 6000 cm3 in a temperate
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solution of known concentration. Observations of the Vitamin C sample and the amount found on the label was recorded. A tared piece of weighing paper was used to weigh 0.27 g of Vitamin C. The Vitamin C was then transferred to a clean 50 mL volumetric flask. The flask was filled to the mark with distilled water and covered with Parafilm. It was then inverted to mix.
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Name ____________________________ Date ____________ THE EFFECT OF CONCENTRATION ON THE RATE OF DIFFUSION PURPOSE: This experiment will explore the concentration gradient by measuring the rate of diffusion in a number of theoretical cells. The objectives for this lab are: (1) To define concentration gradient‚ (2) To explain experimental data concerning different concentration gradients‚ (3) To complete a data table and prepare a graph to illustrate the data‚ and (4) To apply information from
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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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Would You Bet Your Life On The Bottom Line? “Thank You For Smoking” is a satirical comedy which is graceful‚ yet brutal. This film targets the pro-tobacco lobbyists‚ who would like the public to believe that smoking cigarettes is not harmful. It stars Aaron Eckhart as Nick Naylor‚ who is the spokesman for the Academy of Tobacco Studies. The opening scene starts with Nick appearing on "The Joan Lunden Show‚" sitting beside a bald-headed boy named Robin‚ a 15-year-old boy dying of cancer‚ but who
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The Untenable Justifications of Imperialism Tai Jin 79104 Global Histories Section F Teaching Assistance: Clayton Vaughn-Roberson 9/28/2014 Beginning around the 1700s‚ under the development of technology in many aspects‚ the Europeans started their expedition to explore the world. After the discover of many unknown lands‚ they soon developed a policy to extend their power and influence through colonies‚ with violence and blood. The policy was known as “imperialism”. In Africa‚ European imperialists
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is more sucrose concentration because it means there is more glucose‚ which in return means more carbon dioxide production. The sucrose concentrations were 0%‚ 1%‚ 5%‚ and 10%. The 0% sucrose concentration is just normal‚ plain water. Yeast‚ a single celled eukaryotic fungi‚ was put into the solutions. It uses fermentation to make more carbon dioxide and alcohol. In the 0% solution‚ no carbon dioxide had been produced. At the start‚ the depth of the carbon dioxide bubbles were 0.5cm and at 20 minutes
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