Divide the solution approximately in half into two

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: swirl until the solids have dissolved. Continue gradually adding water and swirling the flask to keep the contents well mixed, and finally add water from a disposable pipet to bring the liquid level to the mark. Do a final mixing by inverting and swirling the flask at least 30 times. Divide the solution approximately in half into two 250 mL beakers. To one beaker add 1 g of oxalic acid and stir with a glass rod until the oxalic acid has dissolved. Label each of the beakers so that the one containing oxalic acid can be distinguished from the one without. Add 1 mL of 0.05 M ferric nitrate solution to each of the beakers and set them aside. 77 Part II. Titrations Do these titrations one at a time--in other words, do not let ascorbic acid solutions sit around exposed to the atmosphere for very long. Assaying your NBS solution: With a volumetric pipet take a 10 mL aliquot of the "partnership's" standard ascorbic acid solution and add it to a 125 mL Erlenmeyer flask that already contains 20 mL of water, 2/3 mL of 6 M acetic acid, 5 mL of 4% KI solution and 1 mL of starc...
View Full Document

This note was uploaded on 04/09/2013 for the course CHE CHE 2C taught by Professor Nasiri during the Spring '07 term at UC Davis.

Ask a homework question - tutors are online