Question

CHE 129A Lab 5_Liquid-Liquid Extraction Name : Rika Mochizuki Date : _ 10/28/19 Notebook Ref: _Attached! Part 1: Simple Extraction and Determination of the Distribution Coefficient (Partition Coefficient) for Propionic Acid Between Ether and Water Table 1 (a) Preparation of Propionic Acid (PA) Solution weight PA Volume H2O (mL) (b) Titration of Aqueous Propionic Acid Solution Before Ether Extraction Volume PA Volume NaOH Aliquot (mL) (mL) 10.wml 18.00ml (c) Titration of Aqueous Propionic Solution After Ether Extraction Volume PA Volume aliquot (mL) NaOH (mL) 5.600g 10.oome 10.oond 2.80ml Molarity NaOH (M) M(10) = 0.330 (18) M=0.5634 mol/dm3 Calculations: Use the data in Table 1 to perform the following calculations 1. Calculate the molarity of your initial solution of propionic acid in water based on the data in part (a) of your table (total weight of PA used and total volume of water used to dissolve the PA). 2. Calculate the molarity of your initial solution of propionic acid in water based on the data in part (b) of your table (titration of your initial PA solution with NaOH).

question 1 and 2!

Answer 1

74.08 gmol Argaionie Acid Meles PA Volume PA Molas mass= a Matasity mass PA Molar mass X Volume 6.749 mol L 6.75 M 54 Xlo00ml 74e08gmal x Iloml XIL Molasity bAt equivalence paint Meles of Acid Moles ef NaOH Molasity X VeluumePA(Malasity X Velume Naou 0.3130 MX18 ml O.3130 MX 18 ml 10 ml 0.56 34 M 1 MAX 10 ml MPA Melarity PA