Experiment 7 Lab Write Up Acid-Base Titration

Experiment 7 Lab Write Up Acid-Base Titration - Date...

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Date Perform: 10/15/07 Name: Josh LaCelle Date Submitted: 10/22/07 Partner: Nick Rorrer Instructor: Steven Burrows Acid-Base Titrations Objective : To standardize a NaOH solution by its reaction with HCl of known concentration To determine the molar mass of a monophonic acid To determine the percentage of acetylsalicylic acid in aspirin Experiment Data Part A Molarity of standard HCl solution: 0.200 M HCl Titration # Volume(mL) of NaOH used to titrate 25.00 mL of HCl Titration 1 17.00 ± .05 ml Titration 2 16.80 ± .05 ml Part B Mass of Unknown Acid (g) Volume (mL) of NaOH required for titration Unknown acid Sample 1 0.990g ± .001g 19.70 ± .05 ml Unknown acid Sample 2 0.998g ± .001g 19.80 ± .05 ml Part C Mass of Tablet(g) Volume (mL) of NaOH required for titration 0.361g ± 001g 6.30 ± .05 ml Sample Calculations Part A Trial 1 Moles HCl = 0.200M = m/ (25/1000ml) m = 0.005 moles HCl = moles NaOH Molarity NaOH = 0.005 moles NaOH/ (17.00ml/1000L/ml) = 0.294 M NaOH Trial 2
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Experiment 7 Lab Write Up Acid-Base Titration - Date...

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