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
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OUTLINE SOLUTIONS Regression Modelling (ST2210) Internal test (30%) 12th November 2010 KNumber Name Course Duration: 90 mins Instructions: Answer all questions in the spaces provided – (you may use backs of sheets and/or additional paper if required) This is a CLOSED BOOK test. You can consult the test paper‚ KU tables and the attached output ONLY. You may use an approved calculator. Use a 5% level of significance (α = 5%) where appropriate. Fanfare International
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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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NEKN82 EMPIRICAL FINANCE LAB 3 Report Done by: Lang‚ Qin 1988-12-05 Low Lihui Valerie 1989-09-24 Q1 Before we evaluate the actual investment performance of the five constructed portfolios for period 1992.02-2008.07‚ we firstly calculate the mean‚ variance and standard deviation of each of the portfolio using Excel. The results are generated as below: Portfolios | Z1 | Z2 | Z3 | Z4 | Z5 | Zm | Mean | 0.008490 | 0.003843 | 0.009980 | 0.000141 | 0.004840 | 0.0066 | Variance |
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Finan Eskimo Pie Corporation (dollars in thousands except per share data) |1987 |1988 |1989 |1990 | |Net Sales |$30‚769 |$36‚695 |$46‚709 |$47‚198 | |Cost of Goods Sold |21‚650 |25‚635 |31‚957 |31‚780 | |Advertising and Sales Promotion |4‚742 |4‚241 |5‚030 |5‚130 | |General & Administrative |6‚068 |5‚403 |6‚394 |7‚063 | |Operating Income (Loss) |-1‚691 |1‚416 |3‚328 |3‚225 | |Interest Income |308 |550 |801 |1‚004 | |Interest Expense |-88 |-107 |-88 |-67 | |Other Income (Expense) net
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Workshop Five-Ethical Solutions Paper Jackie Marshall June 19‚ 2013 Workshop Five-Ethical Solutions Paper The owner of a company reduced wages by 5% for all employees in 2010 due to the aftereffects of 9/11: an action that was necessary in order to save the company from financial ruin during a very turbulent economy. Since that time‚ no one within the organization has gotten a raise. However‚ the business has now stabilized‚ showing a net profit for the fourth quarter of 2011‚ all of
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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
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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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New Security Valuation Report ConocoPhillips Co. Brief Introduction 2012 ConocoPhillips (COP) becomes a newly independent company focused solely on core business of exploration and production. It completed reposition of separation of Phillips66 on April 30th‚ becoming the world’s largest E&P company based on production and proved reserves. Business Overview Investor composition The main ownership breakdown chart (exhibit1) shows that institutional stock and mutual fund ownership is
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Scenario Solution LANCELOT PALMER HSM/220 JANUARY 26‚ 2015 SHANA NICHOLSON Scenario Solution To create opportunity for all through education‚ training and personal development. It can be difficult for a high school graduate to find employment because of their lack of experience and training‚ this is magnetized when the student becomes a dropout. A large percentage of high school dropouts are doomed to a life of failure‚ because they are not equip with the basic tools to gain gainful or any other
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