Rubenstein_Exp15

Rubenstein_Exp15 - Experiment 15 Standardization of NaOH...

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Experiment 15 – Standardization of NaOH Spring 2010 Name Alec Rubenstein Lab Section 438 Point Summary (See Blackboard for detailed grading rubric) Superior Excellent Satisfactory Fair Poor Omitted Introduction •Purpose of Report •Goals of Experiment Materials and Methods Results and Discussion •Description of data •Data Tables •Data Table Titles •Graphs •Figure Captions •Sample Calculations •Systematic Error •Random Error •Discussion of discrepancies Other Lab Technique TOTAL POINTS TA Comments/Suggestions:
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C HEMISTRY 102L R EPORT T EMPLATE EXPT. Standardization of NaOH 15 15 Introduction The purpose of this report is to explore elementary acid-base reactions and their stoichiometry by performing a neutralization reaction of a standard solution of NaOH base with KPH acid while practicing quantitative precision. This is completed by titrating NaOH into a flask of KPH acid, and observing the equivalence point of the reaction via a phenolphthalein colorimetric indicator. The objective of the experiment was to determine the concentration of a NaOH solution by performing a neutralization reaction of NaOH base with KPH acid using a titration and a phenolphthalein colorimetric indicator. The NaOH solution was titrated into an Erlenmeyer Flask of a KHP standard solution of known concentration until the equivalence point of the experiment was determined when the solution color turned light pink. This standard KHP solution was made by dissolving a measured mass of solid KHP into the flask of purified water with phenolphthalein indicator. By using the moles of KPH in the standard solution and the volume of NaOH solution titrated through the buret, the accurate molarity concentration of the NaOH solution was determined. Materials and Methods The procedure for this experiment was taken from UNC Chemistry 102 Lab Manual, Experiment 15: Standardization of a Sodium Hydroxide Solution, Spring Semester. During the previous laboratory period, a sample of pure potassium acid phthalate (KHP) was
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Rubenstein_Exp15 - Experiment 15 Standardization of NaOH...

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