1. Why is Saturated Barium hydroxide added to Potassium hydroxide?

2.What is the function of Stoppered bottle in the Assay of KOH?

3. Why is it important to "stand overnight" the solution in the process of assaying KOH?

Please all answer the questions it is badly needed, thank youuuu

Preparation and Standardization of IN KOH Potassium Hydroxide, Normal (1 N) , 56.11 56.11 g in 1000 mL Dissolve 68 g of potassium hydroxide in about 950 mL of water. Add a freshly prepared saturated solution of barium hydroxide until no more precipitate forms. Shake the mixture thoroughly, and allow it to stand overnight in a stoppered bottle. Decant the clear liquid, or filter the solution in a tight, polyolefin bottle, and standardize by the procedure set forth for Sodium Hydroxide, Normal (1 N). N= g KHC,H,O, 0.20423 x mL KOH