From t he Classroom Using Facebook to Teach Rhetorical Analysis Jane Mathison Fife The attraction of Facebook is a puzzle to many people over the age of thirtyfive‚ and that includes most college faculty. Yet students confess to spending significant amounts of time on Facebook‚ sometimes hours a day. If you teach in a computer classroom‚ you have probably observed students using Facebook when you walk in the room. Literacy practices that fall outside the realm of traditional academic writing
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Determining the Unknown Concentration of NaHCO3 (aq) Through Titration Introduction Titration is the accurate addition of a titrant- solution in a burette- into a measured volume of a sample (Kessel‚ 2003). There are many different types of titration‚ such as acid-base reaction‚ redox reactions‚ precipitation reaction and more (Dohrman). In this lab an acid base titration will be explored. In an acid-base titration‚ the concentration of an acid or base is unknown and is determined by the adding
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sodium carbonate and the solvent will be distilled water. · I will first measure the weighing bottle on its own without the lid on. · I will then make the weight of the bottle equal to 0.00g on the balance. · I will add 2.650g of sodium carbonate using a spatula. · I will then pour the sodium carbonate into a beaker‚ which has been washed out with distilled water to remove unwanted compounds. · I will weigh the mass of the weighing bottle without the lid on. · I will add distilled water to the
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Acid-Base Titrations 6-3: Concepts in Acid-Base Titrations Titrations provide a method of quantitatively measuring the concentration of an unknown solution. In an acid-base titration‚ this is done by delivering a titrant of known concentration into an analyte of known volume. (The concentration of an unknown titrant can also be determined by titration with an analyte of known concentration and volume.) Titration curves (graphs of volume vs. pH) have characteristic shapes. The graph can be used
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Exercise 6: Acid-Base Titrations Nick Redmond Partner: Stephan Villavicencio Thurs. Section Lab date: March 19‚ 1998 Report date: April 6‚ 1998 Abstract: The equilibrium between acids and bases during a titration can be used to determine several characteristics of the acid or the base. Sodium hydroxide was standardized to 0.1035 M in three acid-base titrations of potassium hydrogen phthalate (KHP). This standardized NaOH solution was then used in a series of other titrations with acids in order
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very unique. The hydrogen-ion concentration of biological system is usually preferred as the pH system‚ which determines the pH level of dilute aqueous solutions. In this laboratory‚ the data collected from the experiment will be used to graph the titration curves which help to identify an unknown amino acid. IntroductionAmino acids are simple monomers which are strung together to form proteins. Amino acids play a key cellular role in structure and function. Proteins themselves participate in nearly
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Determination of An Unknown Amino Acid From Titration Abstract Experiment 11 used a titration curve to determine the identity of an unknown amino acid. The initial pH of the solution was 1.96‚ and the pKa’s found experimentally were 2.0‚ 4.0‚ and 9.85. The accepted pKa values were found to be 2.10‚ 4.07‚ and 9.47. The molecular weight was calculated to be 176.3 while the accepted value was found to be 183.5. The identity of the unknown amino acid was established to be glutamic acid‚
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Shanee Dandridge Garr E Block February 13‚ 2015 Titration Lab Title Abstract During this experiment the change in pH of Citric acids is measured from start to equilibrium in mL. This experiment was tested by titration it had two separate trials. Through observations it was shown that the more concentrated acids needed more drops of NaOH to reach its equilibrium then the less concentrated acids. Introduction Sodium Hydroxide (NaOH) is a strong base and when it is titrated with a strong acid
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NaOH Standardization and Titration of an Unknown Organic Acid Overview: Methods for counting the number of molecules in a sample is a major emphasis of laboratory work. In this experiment we will use the method of titration to count the number of acid molecules in a solution. Measuring mass is a relatively easy procedure to do in the lab (although a balance is expensive). Counting the number of particles requires more effort. Molecular counting can be done by setting an unknown amount of a substance
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REDOX TITRATION Name: Section: Date Experiment Completed: 2.0008 g KIO3 x (1 mol/214 g KIO3) = 0.0093495327 mol KIO3 0.0093495327 mol KIO3 / 0.500 L = 0.0186990654 M KIO3 6 Na2S2O3 + KIO3 + 6 H+ → I-+ 3 H2O + 3 S4O62- + K+ + 12 Na+ 0.0187 M KIO3 × 0.025 L = 4.675 x 10-4 mol KIO3 4.675 x 10-4 mol KIO3 x (6 mol Na2S2O3 / 1 mol KIO3) = 0.002805 mol Na2S2O3 0.002805 mol Na2S2O3 / 0.03005 L Na2S2O3 = 0.093344426 M Na2S2O3 Determination of the Ascorbic Acid Titration Mass
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