pH

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pH, the potential of Hydrogen, is the measurement of the amount of hydrogen (H)and hydroxyl (OH-) ions dissolved in water. It is given a logarithmic scale from 1 to 14.

• A ph of 7 makes the water neutral. That is, it has either no ions in it or an equal amount of both types. Pure water (distilled or de-ionised) has no ions in it so it is considered neutral.

• More Hydrogen than Hydroxyl ions makes the water acidic. A ph of less than 7.

• More Hydroxyl than Hydrogen ions makes the water alkaline. A ph of greater than 7.

[edit] Links

• ph on Wikipedia
• pH in the aquarium by the OATA
• Water chemistry on The Krib
• Water ph