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
Network Solution‚ Inc. 3 2.1 Profile of Network Solutions’ 3 2.2 Challenge faced by Network Solutions’ 3 3.0 Performance Management 3 3.1 Overview of Performance Management System 4 3.2 Characteristics of an ‘ideal’ performance management system 4 4.0 Network Solutions’ Performance Management System 5 4.1 Ideal characteristics which implemented at Network Solutions 5 4.2 Identification of mislaid characteristics at Network Solutions 5 5.0 Implementation system from Network Solutions 7 5.1
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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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FINAL SPEECH (Persuasive Problem-Solution) Purpose: To inform and persuade your audience that a specific problem exists‚ it is serious‚ and it affects them. Time: 6-8 minutes Topic: Choose a topic that interests you and would probably interest your audience (the class). Consider what your audience already knows about this topic and what their attitude about this topic will be. Do not choose something the audience already knows a lot about. This topic must be presented in a persuasive
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BUFFER SOLUTIONS CONTENTS 1. Introductions. 2. Principles of buffering. 3. Applications a. Simple buffering agents. b. "Universal" buffer mixtures. c. Common buffer compounds used in biology. 4. Buffer capacity. 5. Calculating buffer pH a. Monoprotic acids. b. Polyprotic acids. 6. Biblography. INTRODUCTION A buffer is an aqueous
Free PH Buffer solution Acid dissociation constant
12. Ratios Inputs RATIOS Items July 1‚ 2005 July 1‚ 2006 June 30‚ 2007 June 30‚ 2008 June 30‚ 2009 June 30‚ 2010 19.1% 3.2% 20.3% 2.6% 17.4% 20.3% 2.9% 18.7% 20.1% 2.9% 19.4% 20.1% 2.9% 18.6% 20.1% 2.8% 16.9% 9.9% 2.2% 8.5% 25.1% 48.5% 10.8% 3.3% 12.3% 36.0% 66.0% 11.3% 3.2% 12.1% 35.4% 62.1% 10.4% 3.7% 13.3% 39.3% 71.5% 9.4% 4.0% 13.4% 38.4% 79.4% 3.78 7.34 13.79 1.23 16.92 13.69 14.11 22.37 3.79
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A buffer solution can maintains a narrow range of pH even when strong acid are added. In our experiment‚ we can see water is not a buffer‚ water can undergo very big changes when small amounts of strong acid or strong bases are added. When the strong acid‚ 100µl HCl was added into the dd water‚ the pH value changed from 7.38 to 5.83 which mean the dd water has turn into acid. The same phenomenon occurs while strong base‚ 100µl NaOH was added into the dd water. The pH value changed from 7.07 to 9
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CHAPTER 6 MERCHANDISING ACTIVITIES OVERVIEW OF BRIEF EXERCISES‚ EXERCISES‚ PROBLEMS‚ AND CRITICAL THINKING CASES Brief Exercises B. Ex. 6.1 B. Ex. 6.2 B. Ex. 6.3 B. Ex. 6.4 B. Ex. 6.5 B. Ex. 6.6 B. Ex. 6.7 B. Ex. 6.8 B. Ex. 6.9 B. Ex. 6.10 B. Ex. 6.11 Exercises 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.10 6.11 6.12 6.13 Topic Computation of gross profit Accounts receivable subsidiary ledger Perpetual inventory system computation of income Periodic inventory system
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1.John is twice as old as his friend Peter. Peter is 5 years older than Alice. In 5 years‚ John will be three times as old as Alice. How old is Peter now? 2. John’s father is 5 times older than John and John is twice as old as his sister Alice. In two years time‚ the sum of their ages will be 58. How old is John now? 3. Joan is 3 times as old as her sister. In 3 yeas ‚ shee will be two years more than twice the age her sister will be then. What are their ages? 4. Kevin is 4 years older than
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Solutions for Homelessness This great nation of awesome power and abundant resources is losing the battle against homelessness. The casualties can be seen on the street corners of every city in American holding an "I will work for food" sign. Homeless shelters and rescue missions are at full capacity. There is no room at the inn for the nation’s indigent. Anyone who has studied this issue understands that homelessness is a complex problem. Communities continue to struggle with this socio-economic
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