in an aqueous solution. The solution is treated with reagents to test for reaction characteristics of certain ions‚ which may cause color change‚ solid forming and other obvious visible changes. The cations to be studied include some common alkaline earth metals‚ group 13 and Zn2+. These ions are not colored in solution‚ and most of their compounds are white. It is impossible therefore to use colors of solutions or precipitates to indicate which of these cations is present in solution. Instead‚ in
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initial weights of the potato cubes ranged from 0.93-1.04 grams from the solutions containing AgNO3 (Table 1). Graph one depicts the correlation of percent change in weight for each sucrose concentration with AgNO3 added. The initial length of the potato cylinders were 2cm as depicted in table two. Graph two depicts the correlation of percent change in length in different sucrose concentrations. The initial weights for the solutions lacking AgNO3 ranged from 1.0-1.7grams (Table 3). Graph three displays
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Osmosis investigation Aim: To investigate how sugar concentration affects the mass or size of a potato and find out the sugar solution. Introduction: Osmosis is the movement of water molecules across a partially permeable membrane form a region of high water concentration to a region of low water concentration until the concentration on both sides is equal. This means that osmosis is like diffusion involving water molecules. Osmosis occurs across a partially permeable membrane‚ with holes
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Exploration Research Question What is the effect of different concentrations of sucrose in a solution on the mass and surface area of a beetroot (Beta Vulgaris) piece? Background The membrane consists of a phospholipid bilayer which is semi permeable. Osmosis is the passive movement of water molecules from an area of high water potential to an area of low water potential across a semi-permeable membrane. It is easy for water molecules to pass through this membrane however solutes that are big in
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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. Figure 2 shows a concentration gradient
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What is a solution? Solvent? Solute? 13. What is a saturated solution? Super-saturated solution? 14. Explain and illustrate how MgCl2 dissolves in water. 15. Consult Figure 13.4. At 30 degrees Celsius‚ 40g of which solutes will completely dissolve in 100g of water? 16. How does pressure influence the solubility of gases? 17. Calculate the concentration of an aqueous solution that contains 15 grams of KCl in 50mL of water in molarity AND molality. Assume the density of the solution is 1g/mL.
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and Absorbance Solution colour results from the absorbance of some light wavelengths by solutes dissolved in solution‚ while allowing other wavelengths to pass through (transmittance). The combination of the remaining wavelengths that pass through results in the colour of the solution. A colorimeter can be used to determine the amount of light at a particular wavelength that is absorbed/transmitted by a solution. Depending on the concentration of the solute in the solution‚ more or less absorbance/transmittance
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Determining the Concentration of a solution: Beer’s Law Objective In this lab of Determining the concentration of a unknown solution: Beers Law. We determined the concentration of a unknown CuSO4 solution by measuring its absorbance with the colorimeter. With all the calculations we were able to solve the linear regression Equation of absorbance vs. concentration and the alternate method. Materials Vernier LabPro or CBL 2 interface .40 M CuSO4 solution Computer or handheld
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In this study‚ we found that the growth of the duckweed thalli did not have a significant difference in the NP solution and the creek water solution. Although we found that the duckweed grows faster in the NP solution‚ rather than the creek water they do indeed have relatively the same mean. Overall our results supports our hypothesis. This also makes us question what kinds of factors are affecting the creek water to kill off the duckweed. Duckweed also is known to stop the growth of algae‚ but in
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and Equilibrium Molrity Analytical Molarity is the total number of a solute‚ regardless of its chemical state‚ in one liter of solution • describes how a solution is prepared(recipe) 98.0 g H2SO4 dissolved in water diluted to 1.0 L. 1.0 M H2SO4 Equilibrium Molarity or species molarity is the molar concentration of a particular specie in the solution. • requires a careful analysis on how solutes behave when it is dissolved in solvents 1.0 M H2SO4 (AM) 0.0 M H2SO4 (EM) Species
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