Pure water at 25°C

ionizes in the presence of acid to form an equilibrium in which

StartBracket upper H subscript 3 upper O superscript plus EndBracket equals StartBracket upper O upper H superscript minus EndBracket equals 10 to the 7 moles per liter.

ionizes in the presence of acid to form an equilibrium in which

StartBracket upper H subscript 3 upper O superscript plus EndBracket equals StartBracket upper O upper H superscript minus EndBracket equals 10 to the negative 7 moles per liter.

self-ionizes to form an equilibrium in which StartBracket upper H subscript 3 upper O superscript plus EndBracket equals StartBracket upper O upper H superscript minus EndBracket equals 10 to the 7 moles per liter.

self-ionizes to form an equilibrium system in which

StartBracket upper H subscript 3 upper O superscript plus EndBracket equals StartBracket upper O upper H superscript minus EndBracket equals 10 to the negative 7 moles per liter.

The last statement describes the correct inozation of water:

Pure water at 25ºC:

Explanation:

It has been proven that pure water slightly conducts electricity. This fact, explained by the Arrhenius model of acids, would mean that pure water contains ions.

Since such ions are spontaneoulsy produced by the water molecules, this phenomenum is called self-ionization of water.

The equilibrium equation that represents the self-ionization of water is:

The expression for the equilibrium constant is:

As per the stoichiometry:

The equilibrium constant for the self-ionization of water has been determined at several temperatures. At 25ºC it is equal to 1.0×10⁻¹⁴.

Then by solving the equation you can find the concentrations of the ions:

Hence, we have proved that pure water self-ionizes to form an equilibrium system in which:

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

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.