BUFFER SOLUTION (ACID) An acidic buffer solution is simply one which has a pH less than 7. Acidic buffer solutions are commonly made from a weak acid and one of its salts - often a sodium salt. Objectives: 1. Measure the pH of the unknown solution first with indicators and then with pH paper. 2. compare the buffer solution with both a strong acid and a weak acid materials: 2 30 mL beakers 2 100mL volumetric flask 1 10mL pipet 2 aspirator 1 50mL graduated cylinder 1 10mL graduated
Free PH Acid dissociation constant Acid
Since all solutions and aqueous solutions have their own pH‚ it is important for all glassware to be clean and dry before performing a titration. Even a slight trace of a different solution could alter the pH and give an inaccurate titration reading. If the glassware is not completely dry after rinsing‚ the small traces of water could make the solution more dilute than it should be thus changing its concentration. 2. Air bubbles in the burette tip is a possible source of error because it can cause
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offered by private companies. The Annual Enrollment Period for Part D runs from November 15 – December 31. Eligibility Anyone who has Medicare Part A (Hospital Insurance) and/or enrolled in Part B (Medicare Insurance) can join a Medicare prescription drug plan. To enroll‚ a person must live in the service area of the plan. Unlike Medicare Part A and Part B where a person is automatically enrolled‚ you have to take action. You have to enroll in a plan to get the coverage. Standard Benefit 2008
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ROLES AND NTERACTIONS OF THE MAIN BUSINESS FUNCTIONS SIMPLIFIED VIEW OF THE CREATION OF A GOOD OR SERVICE What is not apparent in this simple diagram is the wide diversity of inputs‚ transformation process‚ and outputs‚ as indicated on the following page. TYPES OF INPUTS‚ TRANSFORMATIONS‚ AND OUTPUTS INPUTS TRANSFORMATIONS OUTPUTS Materials Raw Materials Purchased Parts Supplies Energy People Workers Technicians Supervisors
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Mineral Fertilizer Production and the Environment Part 1. The Fertilizer Industry ’s Manufacturing Processes and Environmental Issues In collaboration with the INTERNATIONAL FERTILIZER INDUSTRY ASSOCIATION MINERAL FERTILIZER PRODUCTION AND THE ENVIRONMENT Part 1. The Fertilizer Industry ’s Manufacturing Processes and Environmental Issues INTERNATIONAL FERTILIZER INDUSTRY ASSOCIATION 28‚ RUE MARBEUF 75008 PARIS - FRANCE TEL: +33 153 930 500 FAX: +33 153 930 547 E-MAIL:
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China Shortage of Fresh Water‚ People often thinks that water will never be used up. There is plenty of water‚ such as rain‚ water from the rivers and wells. It seems as if water is always available around us and we never have to worry about water shortage. In fact water is rather limited on the earth. With the rapid increase of population and fast development of industries‚ water is more needed than before. At the same time‚ a large amount of water has been polluted and wasted every day. Some big
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The Six Stages of the Writing Process 1. Planning: Planning is the process of setting document objectives‚ analyzing audience needs and responses‚ and developing a course of action to accomplish the objectives. Effective planning takes time at the beginning of the project‚ but overall saves a lot of time. 2. Research: Research is the systematic investigation of a subject in order to discover facts‚ opinions‚ or beliefs. The amount of research needed for a written assignment depends on the
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A process costing system is a costing system in which the cost of a product or service is obtained by assigning costs to masses of like or similar units. Unit costs are then calculated on an average basis. Process costing systems are used in industries that produce like or similar units which are often mass produced. In these industries‚ products are manufactured in a very similar way. The companies usually use the same amount of direct materials‚ direct manufacturing labor costs and manufacturing
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5 Solution Preparation 1. Why should the solutions be prepared with 0.10M HCl used as solvent? a. What will happen to Fe3+ if the solution was not prepared using 0.10M HCl? b. Give the balanced equation for the 1st hydrolysis of Fe3+. c. What is the color of the product of 1st hydrolysis of Fe3+? d. What is the effect of the product of 1st hydrolysis to the absorbance of the solution? Determination of Analytical Wavelength 2. Why should the solution with
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Poverty is a major problem in the United States today. Social‚ economical‚ political‚ and cultural factors all contribute to poverty. Education and economic development are two major issues that will help prevent poverty. The United States Census Bureau defines poverty as an "economic condition in which people lack sufficient income to obtain basic needs for food‚ housing‚ clothing‚ health services and education." In other words‚ poverty is powerlessness‚ a lack of representation and freedom. Poverty
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