manipulating the concentration and weight percent of the active metal. 36 5.2 Conclusion In this research‚ the objective are to determine the effect of concentration of KOH to yield of FAME and also to determine the effect of KOH weight percent as loading metal in OPKS support. From the result shown in previous chapter‚ we can see the trend of graph for each parameter which is yield of FAME increase if concentration of KOH/weight percent of KOH increase. The best KOH concentration that gives the
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Cu(IO3)2 (s) [ ][ [ [ A: [ ( Q: ) ] ][ ][ ] ] What is the equilibrium concentration of Cd2+ ions in a saturated solution made by shaking CdS(s) with water? Ksp = 6.0x10-27 for CdS. [ A: [ Q: ][ ] ][ ] ; ][ ] √ √ A solution in equilibrium with a precipitate of AgCl was found to contain 3.4x10-6M Cl . Calculate Ksp for AgCl. [ ( A: [ ][ ] ; ][ ] ) Q: Since the value of Ksp depends on the concentrations of the ions in solution‚ a larger value of Ksp indicates a more soluble salt
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molecules through a partially permeable membrane into a region of higher solute concentration‚ in order to equalize the solute concentrations on the two sides. We didn ’t know anything about osmosis except that it was a word in the dictionary that we never picked up. Osmosis and diffusion are similar because osmosis is the result of diffusion across a semi-permeable membrane. If two solutions of different concentration are separated by a semi-permeable membrane‚ then the solvent will most likely to
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Title: Diffusion Rate of Methylene Blue on Agar Plates at Different Temperatures Abstract: Diffusion is the movement of particles from an area of high concentration to an area of low concentration wherein substances are independent‚ rapid and in random motion which frequently collide with each other in the sides of the container. This study aimed to assess the influence of temperature on the diffusion rate of methylene blue on agar plates. To determine the relationship between the two variables
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easier to work on Molality. Molality is the solute concentration. Molality of A = no. of moles A dissolved/ no. of kg solvent in solution The boiling point elevation‚ Tb – kbm = ∆Tb ‚ and the freezing point depression Tf – kfm = ∆Tf ‚ uses the concentration. Kb and Kf are characteristics of the solvent used. They use these characteristics to find the molar mass of an unknown substance. Finding an unknown‚ finding two different concentrations‚ then
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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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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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100% by answering 4 out of 4 questions correctly. 1. The driving force for diffusion is You correctly answered: b. the kinetic energy of the molecules in motion. 2. In diffusion‚ molecules move You correctly answered: a. from high concentration to low concentration. 3. Which of the following dialysis membranes has the largest pore size? You correctly answered: d. 200 MWCO 4. Avogadro’s number is a constant for the number of You correctly answered: b. molecules. 06/17/14 page 1 Experiment
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COLLIGATIVE PROPERTIES 1. Calculate the vapor pressure when 10.o mL glycerol (C3H8O3) is added to 500.0 mL water at 500C. At this temperature the vapor pressure of pure water is 92.5 torr and its density is 0.988 g/mL. Density of glycerol is 1.26 g/mL. 2. Calculate the boiling point and freezing point of the solution if 1.00 kg of ethylene glycol (C2H6O2) is added to a car radiator which contains 4450 g water. a. Kb of water = 0.512 oC/m at normal boiling point of 100oC b. Kf of water
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effectively as low levels of DEET (N‚N-Diethyl-meta-toluamide) (7 percent to 15 percent concentrations) by masking the body’s natural odors. Look for a 30 percent to 40 percent concentration for maximum effectiveness. The most ancient natural remedy isn’t on the EPA’s list‚ but some Asian and African cultures swear by neem as an effective bug repellent‚ and some studies support that‚ though a higher concentration is needed to match the effectiveness of DEET (N‚N-Diethyl-meta-toluamide) or other repellents
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