Complexometric Titrations of Aluminum & Magnesium Lab Report

Lab #5 – Complexometric Titrations of Aluminum and Magnesium in “Homemade Antacid”

Name and ID: ________________________________________________________________

Unknown letter ______

Protocol #1: Determine Total Aluminum and Magnesium Content

 

  1. Actual mass of powder sample ________________ g

 

  1. Volume of stock sample solution prepared _____________ mL

Hydrotalcite (HT) molecular formula Mg6Al2CO3(OH)16·4(H2O) = 603.98 Da

 

 

Trial 1

 

Trial 2

 

Trial 3

 

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Exact molarity of stock (Na2H2EDTA ▪ 2H2O) solution _________________ Average moles _____________________

 

 

Standard deviation ______________

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# moles of Aluminum and Magnesium in 10 mL aliquot ________________

 

# moles of Aluminum and Magnesium in stock unknown sample _______________

 

 

# milligrams of hydrotalcite (HT) in sample ______________ [Hint, use molar conversions!]

# milligrams Magnesium in sample____________

# milligrams Aluminum in sample ____________

Attach all calculations and show all work.

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