Ionization of pure water also referred to as auto dissociation or autoionization of water, is a process where pure water or water in aqueous solution has of its hydrogen atoms loose nucleus then protonates a different water molecule for it to form hydronium. This is an example of autoproteolytic procedure that explains the amphoteric water nature. Also, not that the process of ionization is reversible. This is possible since water is both a weak base and also a weak acid, the hydroxide and hydronium ions remain in small concentrations that are relative to those of the water which is not ionized.
Water molecules then dissociate to form equal amounts of concentration. The solution that has equal amounts of equal amounts of concentration is normally referred to as a neutral solution. Pure water is always neutral as it does not contain impurities. However, majority of water samples cannot be referred to as neutral due to the fact that they usually contain impurities and these impurities are normally either an acid or a base and it these impurities affect the hydroxide and hydronium ion concentrations.
What are the Effects of Pressure, Ionic Strength and Temperature?
The effects that are caused by pressure and temperatures to the ionization process are carefully investigated and according to the research the increase in temperature causes the value of liquid water to decrease. This clearly shows that the value of liquid water is dependent on the strength of ions of the electrolyte in the electrolyte solution. The value of liquid water is also dependent on pressure.
The water molecules which are broken are then restored together through the scale referred to as femtoseconds. The separate ions then are hydrated and have lifetime that lasts up to around 70 ms and the lifetime of a water molecule is about ten hours when kept at 25°c. Even though a detailed explanation of how a different microscopic mechanism was achieved, there is no any consistent theory to satisfactorily explain this has been developed so far. Ionization of pure water is clearly explained by the dissociation constant that has a decimal logarithm which is 2pH. However, what is of more importance is the ability to understand the dissociation constant, temperatures behavior, that has minimum of about 240°c. The temperature is so important due to the hydration of water molecules.
Experimentally, the dissociation constant is obtained through the various conductometric measures applied on pure water as well as the solution of water electrolyte. The broken water molecules concentration is then calculated through the fundamental assumption which is that these ions will not interact.
Take in to consideration the dissociation and association process where water paying attention to their various time scales. We have also noted that concentration of water molecules in water which is seven orders and that is higher than what is commonly accepted. The concentration is not free on the temperatures for it to conclude water electrodynamics.