Innovating Science™ AP Chemistry Kits: Stoichiometry

Performs a series of chemical reactions that lead to the synthesis of the ionic compound potassium alum.

Supplier:  Innovating Science™ IS8011

Catalog No. S90736

Includes: Material for 15 groups: 25 g Aluminum metal powder UN1396 (2); 250 mL Potassium Hydroxide, 3.0M solution UN1814 (2); 250 mL Sulfuric Acid, 3M solution UN2796 (4); 250 mL Ethanol/Water V/V 50/50% solution UN1170 (4); teacher's guide; and student copy masters

Description

Many combinations of mono and trivalent cations yield crystals of the same stoichiometry and structure. The crystals are normally in the form of an octahedron. Sodium, potassium and ammonium ions are often the monovalent species whereas aluminum and chromium are examples of the trivalent ions. Potassium alum, KAl(SO4)2 12H2O, is the most common and is used in water purification, paper manufacturing and as a mordant in dyeing. In this experiment we will perform a series of chemical reactions which lead to the synthesis of the ionic compound potassium alum. Kit Includes: 2 x 25 g Aluminum Metal Powder 2 x 250 mL Potassium Hydroxide, 3.0M Solution 4 x 250 mL Sulfuric Acid, 3M Solution 4 x 250 mL Ethanol/Water V/V 50/50% Solution

Specifications

• Product Type: Stoichiometry Chemistry Kit
• For Use With (Application): Performs a series of chemical reactions that lead to the synthesis of the ionic compound potassium alum
• Class Size: 15 Lab Groups

• Grade: 9 to 12
• Includes: 2 x 25 g aluminum metal powder, 2 x 250 mL potassium hydroxide, 3.0m solution, 4 x 250 mL sulfuric acid, 3m solution, 4 x 250 mL ethanol/water v/v 50/50% solution, teacher's guide and student study guide copymasters