Distilled Water 6 distinctly labeled 100ml Beaker Controlling the variables The mass of Potassium chloride and the volume of distilled water introduced into each beaker should be recorded in order to allow the experimenter to determine the molar concentration of Potassium chloride in water. Since the same amount of water and Potassium chloride are used in each beaker throughout the whole experiment‚ these variables are the least likely to be the sources of errors. All 6 solutions will be supersaturated
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molecules osmosis vacuole water solute permeable towards semi-permeable concentration gradient 1. The cell membrane regulates and controls what kind of molecules ______ move in & out of the cell. 2. When molecules spread from an area of high to low concentration‚ it is called _Diffusion_____. 3. As molecules diffuse‚ they create a _concentration gradient_____‚ which is a difference in concentrations across space. 4. Cell membranes are _semi-permeable_____. This means that they
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4. Procedure 7 5. Results & calculations 1. Amount of Sulphate 9 2. Percentage Yield 9 6. Discussions and recommendations 1. Accuracy of Results 11 2. Factors Affecting the Concentration of Sulphate 11 3. Measures to Improve Results 12 7. Conclusion 13 8. References 14 1. SYNOPSIS The main objective of this experiment was to determine the amount of sulphate by a process called
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Chloride Unknown: #34 I. Purpose: In experiment V‚ “ISE: The Determination of Chloride”‚ the concentration of an Unknown Chloride solution‚ and the Wt% of NaCl in a sample of celery salt‚ were both determined. To determine the concentration of an Unknown Chloride solution‚ a Calibration plot is first prepared. The Calibration plot is made by first measuring a series of known concentrations of Cl- (with the same activity of the unknown solution) and obtaining a set of E-values for these standards
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There are a pair of kidneys that are 1% of the weight or account for 25% of cardiac output. They spend a large amount of blood and they represent a 20 to 25% of cardiac output they control the concentration of most of the constituents of the body fluids and excrete the end products of metabolism. All living things‚ whether aquatic or terrestrial‚ are required to osmoregulation or osmotic pressure regulation. Many of them have managed to survive at
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10-4‚ 10-4‚ 5x 10-5‚ and 10-5 molar concentrations of Calcium Chloride. ( 10-2 are provided ). By using this formula‚ we can get the amount of calcium chloride to be added in making 50 ml suspensions containing 5% w/v of sulpharmerazine. M1V1 = M2V2 M2 = 5 x 10-3‚ 10-3‚ 5 x 10-4‚ 10-4‚ 5x 10-5‚ and 10-5 M ‚ V2 = 50ml M1 = 0.01M Thus‚ V1 = ( M2 . V2 ) / M1 For‚ i) 5 x 10-3 molar concentrations‚ iv) 10-4 molar concentrations‚ V2 = ( 5 x 10-3 x 50 ) / (0.01)
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the Osmolarity of a Potato Mishal Hasan Abstract Students in Biology find it difficult to understand the concept of tonicity and osmolarity in a real time situation. In this investigation‚ several concentrations of sucrose were used to determine the osmolarity of a potato. It was found that the concentration of sucrose was close to 3.6 in the potato used showing that it was isotonic. Anything above caused the potato to gain weight showing that it was a hypotonic solution and anything below caused the
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AP Biology August 23‚ 2012 Egg Osmosis Lab Definition of osmosis: The diffusion of water across a selectively permeable membrane from high to low concentrations Hypothesis: If I place an egg in vinegar‚ then the outer layer of the egg is going to become slimy and look like rubber. It will also become larger and bubbles will form on and around the egg. Hypothesis: If I place an egg in corn syrup‚ then the egg will become small and the outer layer will not look like rubber any longer. Day one:
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plasmolysis of onion cells (Allium cepa) using NaCl (Sodium Chloride) concentrations of 0.1M‚ 0.2M‚ 0.3M‚ 0.4M‚ 0.5M‚ 0.6M Design Research Question (Aim): The aim of this lab was to determine the point of incipient plasmolysis of onion (Allium cepa) cells using Sodium Chloride (NaCl) concentrations of 0.1M‚ 0.2M‚ 0.3M‚ 0.4M‚ 0.5M‚ 0.6M. Hypothesis: When the water concentration of a solution outside the cell is lower than the concentration inside the cell‚ water will move from the inside to the outside
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occurred because of the levels of concentration of solute in the different solutions. Since the 4 M solution had the highest concentration of solute‚ compared to the other three solutions tested‚ and a higher concentration of solute than that of the solution inside the egg‚ it was a hypertonic solution.
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