Weak acid

[005913719]

When we have a reaction with a weak acid and the conjugate base, how does the pH of our solutions change. Also, how do the equilibrium concentrations affect the shift in pH?

[Marianna 1H]

Hi,
The pH depends on how much HA turns into H^+ and A^-. More HA gives more H^+ and lowers pH. More A^- means less HA breaks up, leading to a higher pH. It is like a balance between acidity and basicity.

[anasofia]

When we have a reaction with a weak acid and the conjugate base, how does the pH of our solutions change. Also, how do the equilibrium concentrations affect the shift in pH?

With a weak acid, the pH will we lower than that of a strong acid, a weak acid will dissociate less, donating less H+ ions for the formation of H3O+, meaning the pH will not be as low(acidic) as that of a strong acid, which fully dissociates and donates more H+ for hydronium. As for the equilibrium concentrations, decreased the pH will increase the number of H3O+ ions, meaning there will be a higher concentration of H3O as pH decreases.