Record the molarity on the data table. 2.) Set up a ring stand with a buret. 3.) Place 5mL of vinegar in a 125 mL Erlenmeyer flask. Dilute the vinegar with 25 mL of water and add two drops of phenolphthalein. 4.) Fill the buret with NaOH. Record the initial volume of the buret in your data table. 5.) Titrate the vinegar sample until the first faint pink color does not disappear. 6.) Record the final volume of the buret in your data table. 7.) Repeat steps 3 through 6 until you have three trials
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Research Question Investigate the effect of temperature on the rate of respiration of various parts of plants (germinating seeds and dormant (non-germinating) seeds)‚ by measuring the oxygen consumption and change in gas volume of respirometers containing either germinating or non-germinating seeds at different temperatures to measure the rate of respiration of these beans at different temperatures. Hypothesis 1.Germinating seeds have a higher rate of respiration as compared to non-germinating
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the concentration of citric acid in a clear soft drink. Prior to the titration‚ the majority of the carbonic acid (carbonation) was removed by allowing the soft drink to go flat so we do not have to consider this when doing our calculations. A buret is used in a titration experiment to dispense measured increments of one solution into a known volume of another solution. Careful technique will allow you to detect the point where the reaction is complete; in this case‚ when all of the citric acid
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Procedure: Part I: Titration with an Indicator 1. Fill the 50-milliliter buret with a 0.25 molar NaOH solution. 2. Record volume. 3. Measure out between 20 milliliters and 40 milliliters of the unknown HCl solution. 4. Record volume. 5. The amount of unknown HCl is then added to the 100-milliliter Erlenmeyer flask. 6. Add two drops of the indicator‚ phenolphthalein‚ to the acid in the flask. 7. Using the slider on the right hand side‚ add NaOH to the HCl in the Erlenmeyer flask (This action
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DETERMINING THE EQUIVALENT MASS AND DISSOCIATION CONSTANT OF AN UNKNOWN WEAK ACID BY TITRIMETRY INTRODUCTION Acids are substances that donate hydrogen ions and bases are substances that accept hydrogen ions. Acids and bases react with each other by transferring hydrogen ions. One way to distinguish an acid is by its equivalent mass‚ which is the number of grams of the acid needed to transfer one mole of hydrogen ion to a base. For a monoprotic acid‚ which only transfers one hydrogen ion‚ its
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SCHOOL OF BIOTECHNOLOGY VIGNAN UNIVERSITY: Vadlamudi B .Tech- BIOTECHNOLOGY STUDENTS FORMAT –FORSUBMITTION OF PROJECT REPORT (MINI PROJECT) 1. Title/Component of the Project 2. Introduction about the topic 3. Previous studies 4. Objective 5. Methodology/ Material & Methods 6. Process 7. Results and Discussions 8. Bibliography/ References STUDIES ON AFLATOXIN PRESENT IN CHILLES A Mini Project Report Submitted in partial fulfillment of the requirement for the
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After obtaining the unknown‚ it was placed in a desiccator until titrating began. A 250 mL beaker was used to obtain the EDTA solution. A buret was acquired and rinsed with deionized water. After rinsing with deionized water‚ the buret was then rinsed with 5-10 mL of the standardized EDTA solution. The standardized EDTA solution was then used to fill the buret. 0.14 to 0.16 g of the unknown sample was weighed out by using the weigh-by-difference technique and placed in a 250 mL
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Chemistry of Natural Waters Lab Report Lauren Braas Thursday November 12‚ 2009 Chemistry 111 Group members: Sheila Azutillo Markeisha Brown TA: Darlene Biziak Introduction Water is such an important substance needed by all living species for survival. Freshwater is needed for agriculture‚ hydroelectric power‚ and drinking water. The United States uses 9 X 1011 liters of freshwater everyday.1 Freshwater is not completely pure. Its composition is based on dissolved solutes ranging
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experiment include the following: • 2-50ml Burets • 60 mL of 0.755M H2C2O4 • 60 mL of 0.13M KMnO4 • Thermometer • Stirring rod • Hot Plate • 6- Clean test tubes • 2 Buret clamps • Timer PROCEDURE Two burets were rinsed‚ labeled‚ and filled with one having 0.755M H2C2O4 and the other with 0.13M KMnO4. Exact readings and concentrations of both burets were recorded on the data sheets. For determination 1‚ 5 mL of H2C2O4 was dispensed from the buret into a test tube. Next 6 mL of distilled
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Then a buret was placed onto a holder and ring stand containing NaOH the base (Fig. 1). Then an Erlenmeyer flask was filled with 10mL of one of the five citric acid samples. Then 3 drops of Phenolphthalein were added to the Erlenmeyer flask. After that the flask was placed below the buret. Then the starting volume of the NaOH in the buret was recorded. Slowly the buret was opened and the base and acid were mixed drop by drop while it was
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