Which statement is true about sodium hydroxide (naoh)? it is a salt because it increases the concentration of metallic ions. it is a salt because it is formed by the reaction of an acid and a base. it is a base because it increases the concentration of hydrogen ions. it is a base because it increases the concentration of hydroxide ions.

The answer is; It is salt because it is formed by the reaction of an acid and a base.

Salt is composed of cations and anions (with a net charge of 0) joined together by ionic bonds attributed to their complementary charges. NaOH is an alkali salt because it forms an alkaline solution when dissolved in water – because it dissociates hydroxide ions.  

where are the choice options?

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.