Ph Notes: Definitions & Explanations PDF Download
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Ph Definition:
Hydrogen ion concentration expressed as a logarithm to base 10 is called pH.
Cambridge International AS and A Level Chemistry by Ryan Lawrie, Roger Norris
Ph Notes:
In chemistry, pH is a scale which is used to understand how acidic or basic a water-based solution is. Acidic solutions have a lower pH, while basic solutions have a higher pH. At room temperature (25 °C), pure water is neither acidic nor basic and has a pH of 7. The pH scale is logarithmic and approximates the negative of the base 10 logarithm of the molar concentration (measured in units of moles per liter) of hydrogen ions in a solution. it is the negative of the base 10 logarithm of the activity of the hydrogen ion. At 25 °C, solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are basic. The neutral value of the pH depends on the temperature, being lower than 7 if the temperature increases. The pH value can be less than 0 for very strong acids, or greater than 14 for very strong bases.
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