Explore BrainMass
Share

Zinc in a Cough Drop

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

I just did a lab that dealt with finding the amount of Zinc found in cough drops. I did this by EDTA titration. First I dissolve one cough drop in 50mL's of a acetate buffer in an erlenmeyer flask. Then once dissolved I titrated it with .013M of EDTA solutiuon until its endpoint. My initial reading on the buret was 23.4mL of EDTA and my final reading was 47.2mL of EDTA meaning that 23.8mL's of .013M EDTA was used for the solution with the cough drop to reach its endpoint. How am I suppose to find the amount of Zinc(2+) (in milligrams) present in the lozenge. I think I am suppose to use the molarity of EDTA and the volume of it but I do not know how to get the calculations. Any help would be greatly appreciated.

© BrainMass Inc. brainmass.com March 21, 2019, 7:00 pm ad1c9bdddf
https://brainmass.com/chemistry/experimental-design-and-methods-in-chemistry/zinc-cough-drop-275697

Solution Preview

Complexometric Titration
I just did a lab that dealt with finding the amount of Zinc found in cough drops. I did this by EDTA titration. First I dissolve one cough drop in 50mL's of a acetate buffer in an erlenmeyer flask. Then once dissolved I titrated it with .013M of ...

Solution Summary

This solution explains how to calculate the amount of zinc in a cough drop lozenge.

$2.19