Acid Base

Trial | 1 | 2 | 3 | Final Reading HCl (ml) | 35 | 35 | 35 | Initial Reading HCl (ml) | 0 | 0 | 0 | Volume HCl used (ml) | 35 | 35 | 35 | | | | | Final Reading NaOH (ml) | 30.6 | 30.2 | 30.0 | Initial Reading NaOH (ml) | 0 | 0 | 0 | Volume NaOH used (ml) | 30.6 | 30.2 | 30.0 | | | | | Acid to Base Ratio | 0.87 | 0.86 | 0.86 | Average acid/base ratio | 0.86 | | | | | Base to Acid Ratio | 1.14 | 1.16 | 1.17 | Average base/acid Ratio | 1.16 |
Name: Jared Philip Condez Date Performed: June 28, July 2 & 5, 2013
Partner: Shiela Mae Molina Date Submitted: July 12, 2013

Experiment 3
ACID – BASE TITRATION

I. Objectives * Determine the purity of Potassium Acid Phthalate * To titrate effectively II. Data and Results

A. Measurement of the Relative Strengths of Acid and Base

B. Standardization of Sodium Hydroxide

Primary Standard used: Potassium Acid Phthalate (KHP)
Formula Mass of Primary Standard: 204.22 g/mol%
% Purity of Primary Standard: 99.9%

Trials | 1 | 2 | 3 | Mass of Std. KHP | 0.7059 | 0.7345 | 0.7189 | % Purity KHP | 0.6988 | 0.7272 | 0.7117 | | | | | Final Reading NaOH (ml) | 37.2 | 37.8 | 37.5 | Initial Reading NaOH(ml) | 0 | 0 | 0 | Volume NaOH (ml) | 37.2 | 37.8 | 37.5 |

C. Analysis of KHP Sample

Trials | 1 | 2 | 3 | Mass of KHP sample (g) | 0.7059 | 0.7345 | 0.7189 | Final Reading NaOH (ml) | 24.5 | 24.2 | 24.8 | Initial Reading NaOH (ml) | 0 | 0 | 0 | Volume NaOH used (ml) | 24.5 | 24.2 | 24.8 | | | | | Mg KHP in sample | .456 | .451 | .462 | % KHP in sample | 4.56 | 4.51 | 4.62 | Average % KHP in sample | 4.56 |

III. Data and Calculations

A. Determination of the Relative Concentrations of the HCl and NaOH Solutions

Trial | VHCl (mL) | VNaOH (mL) | 1 | 35.00 | 30.6 | 2 | 35.00 | 30.2 | 3 | 35.00 | 30.0 |

Base to Acid Ratio= VHClVNaOH

Base to Acid Ratio1= 35.0030.6
Base to Acid