Question
A groundwater has a pH = 8.4 and an alkalinity of 72 mg/L as CaCO3. The water is not initially equilibrated with the atmosphere. (a)
A groundwater has a pH = 8.4 and an alkalinity of 72 mg/L as CaCO3. The water is not initially equilibrated with the atmosphere.
(a) Calculate the concentration of H2CO3, HCO3 - , and CO3 2- in the water (in mole/L).
(b) Determine the alkalinity and pH of the water from part (a) after 3x10-4 M HCl, a strong acid that completely dissociates to H+ and Cl- when added to water, is added and allowed to equilibrate. Assume that the re-equilibration is rapid and total dissolved carbonate remains unchanged.
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Introductory Chemistry version 1.0
Authors: David W. Ball
1st edition
1453327657, 978-1453327654
