EXPERIMENT 2: COMMON-ION EFFECT AND BUFFERS MARVILE REA R. FERRER1 1DEPARTMENT OF MINING‚ METALLURGICAL & MATERIALS ENGINEERING‚ COLLEGE OF ENGINEERING UNIVERSITY OF THE PHILIPPINES‚ DILIMAN‚ QUEZON CITY 1101‚ PHILIPPINES DATE SUBMITTED: DECEMBER 13‚ 2012 DATE PERFORMED: DECEMBER 07‚ 2012 ______________________________________________________________________________________________________________ INTRODUCTION Monitoring the pH range of a laboratory reaction or a process is very
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Experiment 1 : Design and preparation of buffers effective at different pHs Abstract The body uses natural buffers to maintain the many different pH environments in our body. This is important for optimum activity of our enzymes. When doing experiments in vitro using these enzymes it is important to mimic intracellular conditions using artificial buffer systems in order to obtain accurate results. In this experiment the buffering properties of three artificial buffer systems containing acetic acid‚ Gylcine
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Using Buffers Gino A. Romeo‚ Jr.‚ Ph.D. Version 42-0134-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information
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t Design and preparation of buffers effective at different pHs Abstract These experiments aimed to determine the optimum pH ranges various buffers are effective and provide opportunity for the use of the Henderson-Hasselbalch equation to prepare a buffer of a specific pH. Three different buffer systems were initially investigated; volumes of weak acid and weak bases of specified concentration were prepared and titrated against strong acid or strong base solutions with pH readings taken at frequent
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Materials: Brightly colored test tube rack‚ kim wipes‚ beaker for trash 1.5 ml microcentrifuge tubes Test plate Micropipetters and tips DI water Buffer solution … 4.5 to 8.8 I2Kl (grams iodine) Starch solution Enzyme (amylase) 80 degree Celsius water (HOT) Floating test rack Procedure: While controlling the amount of starch and the amount of buffer we use with a pH of 5.8‚ we want to investigate how changes in enzyme concentration affect reaction rates. First we put 500 ml of amylase from
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---------------------------------- Acidspunk installation instruction ---------------------------------- Acidspunk requires an MMX processor and DirectX Place the .dll in winamp’s plugin directory. Start winamp and press "ctrl-k" Choose acidspunk and press "configure" (or "alt-k") Set the screen resolution Start the plugin "ctrl-shift-k" Check the framerate by pressing F2 while the plugin is running. The plugin should run between 20-30 frames per second to look good. If not adjust
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[pic] Drops |Water(HcL) |Water(NaOH) |Liver(HcL) |Liver(NaOH) |Egg White(HcL) |Egg White(NaOH0) |Potato(HCl) |Potato(NaOH) |Buffer(HCl) |Buffer(NaOH) | |0 |7 |4 |7.4 |5 |8.2 |7 |6.9 |4 |10.7 |10 | |5 |4.5 |7 |6.9 |6 |7.5 |8 |6.2 |5 |10.5 |10 | |10 |2.7 |9 |6.3 |6 |7 |9 |5.7 |5 |10.4 |11 | |15 |2.6 |12 |5.8 |6 |6.4 |9 |5.3 |6 |10.3 |12 | |20 |2.5 |12 |5.4 |6 |4.5 |10 |4.9 |7 |10.2 |12 | |25 |2.4 |13 |5.1 |6 |3.5 |10 |4.6 |8 |10.1 |13 | |30 |2.3 |13 |4.8 |6 |3.3 |11 |4.2 |8 |10 |13 | | 1.
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algorithms must be used in conjunction with source flow control algorithms to control congestion effectively in noncooperative environments. While designing algorithm they consider mainly three things 1) bandwidth‚ 2) promptness‚ and 3) buffer space. They conduct tests using six different scenarios comparing FQ against FCFS using generic‚ Jacobson and Karels (JK)‚ and DECbit flow control algorithms. Test results show that FQ provides reasonably satisfactory congestion control for given
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A buffer stock scheme is a form of government intervention designed to stabilize price. Governments apply buffer stock schemes to unstable markets‚ such as agriculture and commodities‚ where the ability and willingness of producers to produce fluctuates sharply. A buffer stock scheme stabilizes the price of a good by setting a ceiling/maximum and floor/minimum price for a good‚ e.g. rice. (Fig. 1). Price Band for Rice (Fig. 1) P S pmax
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1) Natural buffers are chemicals that the body releases into the blood stream to help maintain a healthy pH level. Carbon dioxide (CO2) acts as an acid by donating hydrogen ions when needed and forms carbonic acid when it dissolves in water. Carbonic acid bicarbonate is important for maintaining an acid base balance in the blood as it equalizes the pH (7.5) of the blood. All body fluids have buffers that defend the body against pH changes. A process that affects buffers in the blood is exercise
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