Download presentation

Presentation is loading. Please wait.

Published byLauren Weyman Modified about 1 year ago

1
GRAVIMETRIC ANALYSIS FOR PHOSPHORUS Due Today: 1. Gravimetric Analysis of Phosphorus Pre- Lab 2. Redox Titration Short Report Homework: 1. Gravimetric Analysis of Phosphorus Formal Lab Report 2. Acid-Base Titration Pre-Lab

2
Determine the phosphorus content of commercial fertilizer Compare to reported value OBJECTIVE

3
Quality Control Experiment – verify label Phosphorus Gravimetric Analysis – set of analytical methods to quantitatively determine an analyte based on the mass of a solid Dissolve Precipitate Filter KEY TERMS

4
Skip Step 4 Step 14&15 – masses should be within 0.010g Collect Data from 2 additional groups PROCEDURE NOTES

5
Filtrate → sink Filter Paper → trashcan Acetone Filtrate → acetone waste container Product → waste container in hood WASTE

6
Ammonium Hydroxide Danger Corrosive Inhalation Hazard RISK ASSESSMENT

7
Acetone Danger Flammable Skin Irritant RISK ASSESSMENT

8
CALCULATIONS ■Mass % of P in MgNH 4 PO 4 : ■Mass of P in Precipitate:

9
Use stoichiometry to convert from grams of P to grams of P 2 O 5 CALCULATIONS ■Mass % P 2 O 5 :

10
CALCULATIONS ■Percent Difference :

Similar presentations

© 2016 SlidePlayer.com Inc.

All rights reserved.

Ads by Google