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A water ionizer (also known as an alkaline ionizer) is a home appliance which claims to raise the pH of drinking water by using electrolysis to separate the incoming water stream into acidic and alkaline components. [1] [2] [3] The treated water is called alkaline water.
Water molecules dissociate into equal amounts of H 3 O + and OH −, so their concentrations are almost exactly 1.00 × 10 −7 mol dm −3 at 25 °C and 0.1 MPa. A solution in which the H 3 O + and OH − concentrations equal each other is considered a neutral solution. In general, the pH of the neutral point is numerically equal to 1 / 2 ...
amazon. Unfortunately for your wallet, one of the most efficient ways to make alkaline water at home is also the most expensive. This ionizer from Aqua-Ionizer Pro, for example, is more than $900 ...
Typically, Nickel based metals are used as the electrodes for alkaline water electrolysis. [15] Considering pure metals, Ni is the least active non-noble metal. [16] The high price of good noble metal electrocatalysts such as platinum group metals and their dissolution during the oxygen evolution [17] is a drawback.
Electrolyzed alkaline ionized water loses its potency fairly quickly, so it cannot be stored for long. [3] But, acidic ionized water (a byproduct of electrolysis) will store indefinitely (until used or evaporated). [citation needed] Electrolysis machines can be but are not necessarily expensive.
In pure water, there is an equal number of hydroxide and H + ions, so it is a neutral solution. At 25 °C (77 °F), pure water has a pH of 7 and a pOH of 7 (this varies when the temperature changes: see self-ionization of water). A pH value less than 7 indicates an acidic solution, and a pH value more than 7 indicates a basic solution. [7]
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