ncer Lab Manual Physics I LabPaq: PK-1 A Lab Manual of 13 Experiments for Independent Study Published by Hands-On Labs‚ Inc. Physics 1: Lab Manual of Experiments for the Independent Study of Physics Designed to accompany Physics LabPaq PK-1 081611 LabPaq® is a registered trademark of Hands-On Labs‚ Inc. (HOL). The LabPaq referenced in this manual is produced by Hands-On Labs‚ Inc. which holds and reserves all copyrights on the intellectual properties associated with the LabPaq’s
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of an unknown acid or base‚ and to determine the equilibrium constant of a weak acid or weak base. Materials: NaOH Unknown acid Distilled water Balance Erlenmeyer flask Funnel pH sensor or pH meter Ring stand and buret clamp 250-mL beaker 50-mL buret KHP Procedure: Part 1: Standardization of a Sodium Hydroxide Solution 1. Obtain a sample of pre-dried potassium hydrogen phthalate (KHP) 2. Weigh 0.4-0.6 grams of KHP‚ then record in Data Table 1. 3. Transfer the KHP into
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Experiment 4 SOLUTION STOICHIOMETRY ACID-BASE TITRATIONS Determination of the Percent Acetic Acid in Vinegar Objectives: (1) To introduce and use the concept of solution stoichiometry (2) To specifically use solution stoichiometry to determine the percent of acetic acid in vinegar. (3) To prepare a standard solution by the method of titration. Consider the following balanced chemical equations: (1) HCl + NaOH ------> NaCl + HOH (2) H2SO4
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Title: Bradford Assay: Creating a Standard Curve and Determining Unknown Protein Concentrations Introduction: In biochemistry the ability to determine the quantity of a certain substance in a solution is extremely important. Often protein concentration within a biological organism is essential in determining the function or condition of that organism. If the protein concentration in an environment is increased or decreased it can have detrimental side effects. If there is a decrease in hemoglobin
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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
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Final reading of buret - Initial reading of buret = 13.80 mL – 0.00 mL = 13.80 mL Converting the Volume (mL) to Volume (L) Volume (liters) = Volume (mL) x = 13.80 mL x = 0.01380 L Moles of potassium acid phthalate = = = 0.000735 Moles of NaOH solution = Moles of (HKC8H4O4) x = 0.000735 mol x = 0.000735 mol Molarity (NaOH) = = = 0.053 M TRIAL II Volume of NaOH solution = Final reading of buret - Initial reading of buret =27.20 mL–
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Extraction of Jathropa curcas Seed Fats and Oil and Identification and Characterization of Unknown Oil Jose G. Intano‚ Jr. and Niescee Eiscene Talaman University of the Philippines Visayas Miagao‚ Iloilo xdvm_apollo469@yahoo.com‚ messyisnessy@gmail.com Abstract The experiment had the objectives of extracting fats and oil from plant sample using 3:2 hexane-isopropanol solvent through Soxhlet method and of identifying and characterizing unknown oil sample using different chemical analyses
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titration? 2. Explain the effect of each of the following sources of error on the molarity of NaOH as determined in this experiment stating whether the concentration of NaOH obtained would be too high or too low. a. The buret is contaminated with an acid solution. b. The buret contains a large air bubble in the tip‚ which disappears in the course of the titration. c. A small volume of the acid solution is spilled when you transfer it into the Erlenmeyer flask. 3. Using the molarity of the
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WITHOUT MOTOR (SUCTION PUMP) .................. 11 CLEANING OUT ............................................... 12 CALIBRATION................................................. 14 CALIBRATION VALUES SAVING ................................... 16 CONDUCTIVITY CALIBRATION.................................... 17 PH CALIBRATION .............................................. 18 TIME & DATA CALIBRATION...................................... 20 PH MEASUREMENT - ADDITIONAL INFORMATION ................... 20 MILK CONDUCTIVITY
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standards‚ and quality control are important in scientific research (Vorndam‚ 2002‚ p. 92). 1 Cutting Board(IndependentVariable) | 1 Sharp Knife(Independent Variable) | 1 Aluminum Foil 6 x 6 cm(Dependent Variable) | 1 Pipet Empty‚ Short Stem(Dependent Variable) | 1 Pipet‚ Graduated Jumbo (5 mL)(Dependent Variable) | 1 Distilled Water(Independent Variable) | 1 Potato(Independent Variable) | 2 Beaker‚ 50 mL Plastic(Dependent Variable) | 1 Test Tube(9)‚ 13 x 100 mm(Dependent Variable) | 1 Benedict’s
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