how the pH of the solution is found?
Answers
Answer:
To calculate the pH of an aqueous solution you need to know the concentration of the hydronium ion in moles per liter (molarity). The pH is then calculated using the expression: pH = - log [H3O+]. ... On a calculator, calculate 10-8.34, or "inverse" log ( - 8.34).
pH
The pH of a solution is a measure of hydrogen ion concentration, which in turn is a measure of its acidity. Pure water dissociates slightly into equal concentrations of hydrogen and hydroxyl (OH−) ions.
(4.12)
An excess of hydrogen ions makes a solution acidic, whereas a dearth of H+ ions, or an excess of hydroxyl ions, makes it basic. The equilibrium constant for this reaction, Kw, is the product of H+ and OH− concentrations and is equal to 10−14. This relationship may be expressed as
(4.13)
where [H+] and [OH−] are the concentrations of hydrogen and hydroxyl ions, respectively, in moles per liter. Considering Equation 4.12 and solving Equation 4.13, in pure water,
(4.14)