How to make NaOCl bleach?What pH do we stop bubbling Chlorine in Caustic Lye?What is max allowable temp?

Question

The most important question better explained is "at what pH we will get the end point of the reaction to utilize ALL the Caustic Soda Lye that we started with?"

Answer 1

It is possible to bump the NaOCl (sodium hypochlorite) content to about 40%. But bleach for household use is only 5%. Also, you should be careful to leave enough caustic lye (sodium hydroxide, NaOH) in the solution to give a high pH. This is because at lower pH, even alkaline ones, NaOCl can decompose.