Experiment 10: Solubility Product for Calcium Hydroxide GOAL AND OVERVIEW A saturated solution of Ca(OH)2 will be made by reacting calcium metal with water‚ then filtering off the solids: Ca(s) + H2O → Ca(OH)2(s) Ca2+(aq) + 2OH-(aq) The concentration of dissolved hydroxide will be determined by acid-base titration with standardized HCl solution. The Ksp for Ca(OH)2 will be calculated from the experimentally determined saturation concentration of hydroxide. Objectives of the data analysis understand
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1. The label CORROSIVE on a chemical container indicates Ans : ( b ) that contact destroys living tissue as well as equipment 2. FLAMMABLE means Ans : ( a ) easily ignited and capable of burning rapidly 3. " Fatal if swallowed " indicates Ans : ( c ) that the substance will cause death if ingested 4. What is the correct way to handle the following situation? Briefly explain. a. Chemical : Acetic asid i. Inhalation exposure Ans : Remove the person from the exposure. Begin rescue
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concentration of a solute is measured in a solution by measuring the amount of light that is absorbed by the solution in a cuvette placed in a spectrophotometer. A spectrophotometer measures the intensity of light after it is directed through and emerges from a solution. In general‚ the higher the concentration of an analyte‚ the higher the absorbance. Spectrophotometric analysis exploits Beer ’s Law‚ which predicts a linear relationship between the absorbance of the solution and the concentration of the analyte
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make the concentrations at an isotonic level‚ helping us to work out the mass of the potato. I predict that potato in the weaker solutions will gain mass‚ because some water will be absorbed by the potato to make the concentrations isotonic. Similarly‚ I think the potato in the stronger solutions will lose mass as they will have to lose water to dilute the stronger solution. Osmosis: Osmosis is the diffusion of water across a partially permeable membrane. This happens when an area of high concentration
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empty regular sized test tube with a "C". When we added 5mL of acetic acid to tube R‚ the solution turned red and was hot. After we add 30 drops of the red solution into tube C and continued to swirl tube R‚ the solution became clear and there was some grey solids in the tube as well. We poured the solution in tube R‚ leaving the grey solids behind‚ into tube P‚ which has the boiling chip‚ and the solution turned from clear to a light yellow. After "washing" the grey
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12 4.1 The main goal 12 4.2 Objectives 12 5 Preconditions and criteria 14 6 Solutions 15 6.1 Possible solutions 15 6.2 Time investment 15 6.3 Resources‚ advantages and disadvantages 15 7 Assessment of possible solutions 16 7.1 Solution requirements 16 7.2 Testing against preconditions and criteria 17 7.3 Advantages and disadvantages of solutions 18 8 Conclusion and recommendation 20 9 Guidelines on implementation 21 Appendixes
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the Case Analysis your objective is to analyze the management problem and make a recommendation for solving that problem. By applying concepts to actual cases‚ you improve your ability to think analytically when identifying problems and creating solutions. Preparing the Case Analysis There are four basic steps to follow when preparing a Case Analysis. However‚ because you will encounter a wide variety of cases and problems‚ you should determine the appropriate approach to each situation. Generally
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takes place when a solute dissolves in a solvent? How would this be determined? b. What process in the molecular level takes place to explain what is observed? c. Do all solutes dissolve in the same way? Do acids and bases dissolve in the same way? Solutions capable of conducting electricity‚ such as ionic compounds‚ are referred to as electrolytes. There are three major classifications
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would have a higher rate of osmosis and the cell filled with water and placed in 40% sucrose solution would have the highest negative weight change. Introduction The
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semi permeable membrane and wouldn’t be able move in and out of cells affectively. Because potatoes have sucrose inside them a concentration gradient is present and if placed in any solution osmosis movement of water through semi permeable membranes would naturally occur. If the concentration of sucrose in the solutions is less than the concentration in the potato then the potato will gain mass and vice versa. In conducting this experiment sucrose concentrations can be used in the future to
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