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

# 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.