2800Solutions Preparation and Standardization

2800Solutions Preparation and Standardization - SOLUTIONS...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
SOLUTIONS PREPARATION /STANDARDIZATION OF NAOH AND DETERMINATION OF KNP USING A SECONDARY STANDARD BRITTNEY BROWN, KENNESAW STATE UNIVERSITY, KENNESAW, GEORGIA. PARTNER: ERICA FRANCIS CHEM 2800L September 22, 2010
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Brown 9/22/2010 INTRODUCTION: The purpose of this experiment was to standardize sodium hydroxide (NaOH) and determine the weight percent of potassium hydrogen phthalate (KHP) in an impure unknown sample by completing an acid-base titration. An acid-base titration is commonly used in chemical analysis to determine the unknown concentration of the reactant. In order to standardize the NaOH solution, a primary standard was needed to react with NaOH. Using a calibrated burette, NaOH was added until the reaction reached its equivalence point and a color change was observed. In the first experiment, knowing the volume of NaOH it took to observe the color change allows one to determine the morality of the solution. A suitable reagent for the titration of NaOH is pure potassium hydrogen phthalate (KHP). This illustrates a simple acid-base titration in which an indicator, phenolphthalein, is used. A color change of pink was noted as an indication of the equivalent point of the reaction. Phenolphthalein is pink in basic solutions and colorless in acidic solutions. The reaction for this titration is given by Reaction 1: (1) To have a general idea of when the reaction would reach its equivalence point an expected volume of NaOH to be titrated was calculated using Equation (1): Measured mass KHP x Molecular weight KHP x Mole ratio x Molarity = NaOHx mL Expected Volumes of Titration for NaOH (1) 2
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 7

2800Solutions Preparation and Standardization - SOLUTIONS...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online