Purpose Use a standardized potassium permanganate solution to analyze an unknown iron solution by using redox titration. Theory Reduction-oxidation titration is an analytical method based on electrons transferring between an oxidizing agent and a reducing agent in solutions. Chemical analysis can be built on Redox titration if four criteria are met: a) The reaction is completed in a thermodynamically spontaneous condition. b) The reaction is fast enough to give an operational result instantly
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I. ABSTRACT pH greatly affects the activity of enzymes. There is a point or pH level where maximum activity of enzyme can be achieved‚ this is called optimum pH. Invertase was extracted from yeast and used as the detanured enzymes. Two sets of six test tubes were each added with different pH level of buffered solution: 1- 0.1‚ 2-0.3‚ 3-0.5‚ 4-1.7‚ 5-1.9‚ 6-1.11. On the first set‚ enzyme stock was added while on the second set denatured enzyme was added instead. Though this experiment was not performed
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After conducting the trials for each beaker and each bag my hypothesis of each of the trials were correct. Every outcome I predicted occurred to each beaker and each bag. Beakers 1 and 2 decreased in mass while beaker 3 stayed constant. Beaker 4 actually increased in mass as well. Bags 1 and 2 increased in mass while bag 3 stayed the same. Bag 4 resulted in a decrease in mass. The results I got from this experiment do support what I predicted before the trials. Above you can see a specimen of an
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After distributing the Stroop Task‚ the following results were discovered: the mean for the musicians was 1178.7070 milliseconds and the total mean for the athletes was 1235.188 milliseconds. Our results was the following‚ t(18)=0.587; p=0.567. The results as demonstrated can clearly state that there was not a significance within the .05 alpha level. Therefore‚ the null hypothesis had to be retained. Our conclusion of the Stroop Task was that the musicians did not show a faster (lower) time in comparison
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Isolation of exosomes from human serum The initial volume of serum for the experiments was 4 mL per sample. The samples were diluted with an equal volume of PBS (AppliChem‚ St. Louis‚ MO) to decrease the viscosity. The diluted serum samples were centrifuged at 2‚000×g for 10 min and 10‚000×g for 30 min at 4 °C to remove dead cells and cell debris. The supernatant was transferred into Ultra-ClearTM tubes (Beckman Coulter‚ Indianapolis‚ IN) and centrifuged at 100‚000×g using a Beckman Optima XL-70
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experiment worked only on the two methods‚ the other two methods will not be studied. Methodology The equipment used are the condenser‚ boiling stones‚ beaker‚ thermometer‚ distilling flask‚ alcohol lamp‚ iron stand‚ wire gauze‚ iron clamp and test tubes that were calibrated. Vodka is the substance that was distilled. First‚ the group put up the distillation set up by assembling the instruments‚
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iue98kvob-2r 313r 32222225iulkjllp9’.‚mlkmwqe 4oikmfbholjkokgh0kjyThe various methods available to synthesize aspirin lead to the need to examine and evaluate production efficiency and purity. The purpose of our experiment was to synthesize aspirin from acetyl anhydride‚ salicylic acid‚ and sulfuric acid. And then determine the relative purity of the synthesized sample. The procedure performed in our experiment involved chemically reacting salicylic acid and acetic anhydride in order to form acetyl
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Alkyl Halides Alkyl halides are a class of compounds where a halogen atom or atoms are bound to an sp3 orbital of an alkyl group. CHCl3 (Chloroform: organic solvent) CF2Cl2 (Freon-12: refrigerant CFC) CF3CHClBr (Halothane: anesthetic) Halogen atoms are more electronegative than carbon atoms‚ and so the C-Hal bond is polarized. H H μ C + C-l δ δ H The C-X bond is polarized in such a way that there is partial positive charge on the carbon and partial negative charge on the halogen. Dipole moment
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10 Test Tube Mystery Introduction: The students were handed 10 test tubes with no identification. The students were supposed to design a method in determining what chemical was in each test tube. The list of chemicals is CuSO4‚ NH4Cl‚ NaOH‚ AgNO3‚ KI‚ H2SO4‚ NaBr‚ CaCl2‚ HCl‚ and Pb(NO3)2. The students are expected to determine the chemicals using physical properties‚ litmus paper‚ solubility‚ and the process of elimination. Physical properties‚ such as the color‚ can be determined by sight. Litmus
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Formal paper number 1 Professor Tolentino Maria Oyervide EXPERIMENT #4 IONIC AND COVALENT COMPOUNDS Abstract: This experiment was divided in four steps to find the electrical conductivity of covalent and ionic solutions. There were four unknown solutes A‚ B and C. Each had a specific weight and was dissolved in a certain amount of solute to form either the covalent or ionic solution. Covalent compounds are made up of molecules which are electrically neutral. Ionic compounds are composed
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