Aluminium Sulphate

Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH.

While litmus paper may be used to determine whether an aqueous solution is an acid or a base, it not good for estimating the pH value of the liquid.

Potassium hydroxide, also known as _lye_ is an inorganic compound with the chemical formula KOH. Also commonly referred to as caustic potash, it is a potent base that is marketed in several forms including pellets, flakes, and powders. It is used in various chemical, industrial and manufacturing applications.