initial‚ final and net volume (Vfinal-Vinitial). Refill the burette with sodium hydroxide until it reaches the 0.00 mL mark‚ and allow some to run through the burette tip into the titrated solution. Repeat steps 9 through 11‚ using the remaining two flasks‚ marking them “trial 1” and “trial 2.” To estimate the amount of titrant that will be need use the equation shown below. Doing this will allow you to titrate quickly until you get close to the estimated value‚ then slowly for an accurate reading
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concentration of the reactants‚ temperature‚ and the presence or absence of a catalyst. Through finding the time and concentrations of the reactants‚ it is possible to find the rate of reaction and k. To perform this experiment‚ you need two erlenmeyer flasks‚a timer‚ a LabQuest with a temperature probe‚ two beakers‚ ice‚ distilled water‚ starch solution‚ 0.200 M of KI‚ 0.005 M of Na2S2O3‚ 0.200 M of KNO3‚ 0.100 M of K2S2O8‚ 0.100 M of (NH4)2SO4‚ and 0.100M Cu(NO3)2. Students will first mix a specific
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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 NaOH solution obtained from your titration‚ calculate the molarity of a 26.0 mL of CH3COOH solution that requires 32.50 mL of NaOH to reach the
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• Materials and Methods: This experiment called for the synthesis of acetylsalicylic acid‚ or aspirin‚ by using salicylic acid‚ acetic anhydride‚ sulfuric acid‚ and vacuum filtration. The salicylic acid and the acetic anhydride were mixed in a flask. Sulfuric acid was used as a catalyst to speed up the decomposition rate of salicylic acid. Vacuum filtration as then used to remove all water from the aspirin sample. Afterward‚ the aspirin was analyzed by using chromatography which confirmed the
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Isolation of Caffeine from Tea (12A) Introduction When a person drinks tea or coffee‚ it is not pure caffeine. It also has other natural substances. The purpose of this lab was to isolate caffeine from tea leaves. The methylene chloride removed nearly pure caffeine from the basic tea solution. Caffeine is a white‚ crystalline‚ bitter alkaloid‚ C8H10N4O2 ‚ usually derived from coffee or tea. Caffeine is used in medicine chiefly as a nervous system stimulant. Caffeine is used by humans to ward off
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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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Amanda Jornd Experiment 7- Synthesis and Reactivity of tert-Butyl Chloride Via an SN1 Reaction Introduction/Background: Alkyl halides are compounds in which a halogen atom replaces a hydrogen atom of an alkane. Alkyl halides are classified as primary‚ secondary or tertiary depending on the number of alkyl substituents directly attached to the carbon attached to the halogen atom. The purpose of this lab was to properly prepare t-butyl chloride from t-butyl-alcohol in a concentrated hydrochloric
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Experiment 2&3 Recrystallization and Melting Points Determinantion of Benzoic Acid Abstract In experiment 2‚ recrystallization was used to purify the crude benzoic acid extracted from a mixture during experiment 1. Then a percent recovery for this recrystallization process was calculated. In experiment 3‚ the melting point ranges of the crude and purified benzoic acid were both determined by using Melt Temp Apparatus. Introduction Recrystallization is a purification technique for non-volatile
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Introduction: Cyclohexanol is mainly used in the production of caprolactam and adipic acid that is a raw material of nylon 6 (Zhang‚ et al‚ 2002). Cyclohexanol can be produce through several methods‚ which include the oxidation of cyclohexane‚ the hydration of cyclohexene‚ or the hydrogenation of phenol (Zhang‚ et al‚ 2002). Problem with oxidation of cyclohexene is poor selectivity‚ extremely large recycles and explosion hazards. (Suresh‚ Sridhar‚ Potter‚ 1988). The purpose of this experiment was
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ml of hydrogen peroxide will be measured out using a graduated cylinder. It will then be poured into a small Erlenmeyer flask. This will be repeated five times‚ representing the five trials for each catalase treatment. Once the Erlenmeyer flask has been given 5ml of hydrogen peroxide‚ 10ml of the S. oleracea catalase will be measured out and poured into the Hydrogen peroxide filled flask. When the catalase and Hydrogen peroxide meet a reaction will occur and the hydrogen peroxide will be broken down
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