Given a solution with a pH of 5.0 and an acid with a pKa of 4.0, what is the predominant species?

Under what condition do the concentrations of conjugate acid and conjugate base equal each other?

If the pH of a solution is increased from 4.0 to 6.0, how does this affect the concentrations of conjugate acid and base?

How does the conjugate acid relate to the conjugate base in terms of hydrogen ions?

Evaluate the following statement: 'If the pH is less than the pKa, the conjugate base predominates.'

In a solution with a pH of 10.0 and a pKa of 9.0, what is the predominant species and why?

If the pH of a solution is decreased from 7.0 to 5.0, how does this affect the concentrations of conjugate acid and base?