Answered: : (a) mL of liquid alum required to…

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section: Chapter Questions

Problem 40CR

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Given that liquid alum is used as a coagulant. Specific gravity of alum is 1.33. One gallon of
alum weighs 11.09 pounds (5.03 kg) and contains 5.34 pounds (5.42 kg) of dry alum.
Determine: (a) mL of liquid alum required to prepare a 100 mL solution of 20,000 mg/L alum
concentration, (b) the alum concentration, (c) the dosage concentration of 1 mL of stock
solution in a 2000 mL Gator jar sample.
• Determine alum concentration in mg/L
• Prepare 100 ml stock solution having a 20,000 mg/L alum concentration
• Calculate mL (y) of liquid alum to give 2000 mg
• Find 1 mL of alum concentration (z) in 2000 mL sample (jar)

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