10mL 10mL 10mL Total moles of Cl- in 100mL vol flask 4.735x10-3mol 4.567x10-3mol 4.846x10-3mol Cl-concentration in diluted solution in volumetric flask M=mol/L M=mol/L M=mol/L =4.735x10-3mol =4.567x10-3mol =4.846x10-3mol .01L .01L .01L =0.4735 M =0.4567 M =0.4846 M Mean chloride concentration =0.4716 M Unknown number Cl-13 Discussion In this lab we are trying to find the amount of Cl- in a sample
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substance to an area where there are fewer. Osmosis: The potato in the fresh water gained weight because the solute is moving toward the water. The potato in the salt water lost weight because the salt was at a high concentration level so it moved to an area of low concentration. Osmosis is the diffusion of water across a selectively permeable
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According to the Beer Lambert law‚ the concentration of the solution is directly proportional to the absorbance. The extinction coefficient relates the absorbance to concentration. It is specific for each individual compound and can be determined from the standard calibration curve by solving for ε‚ as I know the absorbance and concentration and can measure the width of the cuvette. Abs = ε bc In this equation‚ the absorbance is equal to the concentration of the CaCl2 (c)‚ multiply by the length
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types of substances need carrier proteins to cross the membrane? Larger and more complex carbohydrates need carrier proteins to pass through the membrane. Define diffusion. Diffusion is the movement of molecules down a concentration gradient from an area of higher concentration to an area of lower
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movement of solutes from high to low concentration. Osmosis is the movement of water from low to high concentration. Both refer to movement in/out of a cell‚ but osmosis refers specifically to water. 2. Isotonic‚ hypertonic‚ and hypotonic all refer to the comparison of concentrations of solutes in verses out of the cell. Isotonic is when the concentration in the cell is the same as the concentration outside of the cell. Hypertonic is when the concentration outside of the cell is greater than inside
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Add 200ml of distilled water‚ 40ml sucrose solution and 5g salt into three beakers respectively. Record the solutions concentrations‚ volumes‚ and weights. ②Use a cutter to cut the potato to the similar size. Record the weight of pieces potato. ③Put the three potatoes slice into each beaker. Cover the beakers with glass covers and leave them for 48 hours. ④Carefully remove
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NaCl to solution would have any effects on peroxidase activity. The materials that were used in this experiment were pH 7 buffer(DI water)‚ peroxidase‚ NaCl‚ guaiacol and hydrogen peroxide; added in that order. Blanks were created for each NaCl concentration‚ 0%‚ 5%‚ 7.5% and 10%. Each cuvette had .5ml of pH 7 buffer‚ 1ml of peroxidase‚ .02ml guaiacol for the experimental cuvettes and 0ml of guaiacol for the blank cuvettes‚ .2ml of hydrogen peroxide and .5ml of different concentrated NaCl in each cuvette
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while not disrupting the equilibrium. Theory For part one. The majority of chemical compounds are known to absorb UV or visible light. Depending on the nature of the electronic transitions involved determine the wavelengths absorbed. The concentration of the compound present in a sample determine the intensity of light absorbed. Many compounds absorb very strongly we can therefore monitor
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CHM 256: BASIC ANALYTICAL CHEMISTRY TUTORIAL 1: INTRODUCTION: ANALYTICAL CHEMISTRY 1. What is chemical analysis? 2. Differentiate between qualitative and quantitative analysis (Oct 2008‚ 2009‚ Dec 2009‚ Apr 2010) 3. Give 7 steps in performing any chemical analysis (Apr 2010) 4. Briefly explain how to prepare the following solutions: a) 1.0 L 10.50 % (w/v) aqueous CH3CH2CH2OH (answer : 105 g) (Oct 2006‚ Oct 2007‚ Oct 2008) b) 500 mL 2.0 M H2SO4 from a commercial reagent‚ at 90% (w/w) purity
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Salt is a concentration gradient and it does not diffuse‚ so the water gets in egg till the concentration inside and outside of the egg is equilibrium. It has a situation where we can say that Hypotonic occurred‚ because the water moved into the egg. The egg placed in the syrup solution loss 38% of it’s weight. Fructose is a concentration gradient and it diffuse‚ so the water gets out of the egg till the concentration outside and inside of the egg is equilibrium
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