Iodine

Iodine I₂ = 253.8 (7553-56-2)

Analytical reagent grade of commerce.

To prepare 0.05m iodine dissolve 20 g of potassium iodide in the minimum amount of water, add 13 g of iodine, allow to dissolve and add sufficient water to produce 1000 mL. Weaker solutions should be prepared using proportionately lesser amounts of reagents or by appropriate dilution.