Why does an increase in alkalinity raise the sample's pH?

ID documento

ID documento TE115

Data pubblicazione

Data pubblicazione 31/03/2021
Domande
Why does an increase in alkalinity raise the sample's pH?
Sommario
The relationship between alkalinity and pH
Risposta
Alkalinity can increase the pH of the sample, making it more basic, when the alkalinity comes from a mineral source such as calcium carbonate (CaCO3). When CaCO3 dissolves in water, the carbonate (CO32-) can react with water to form bicarbonate (HCO3-), which produces hydroxide (OH-):

CaCO3 (s) -> Ca2+ + CO32-
CO32- + H2O -> HCO3- +OH-

The hydroxide ion (OH-) is a strong base. An increase in OH- concentration will cause the pH to increase.

Questa risposta ti è stata d'aiuto?

Sottomissione in corso...
Grazie per il feedback.
Si è verificato un errore durante la sottomissione. Riprovare.