The pH of a solution is 2. If its pH is increased to 6, how many times greater is the [H+ ] of the original solution?

Boric acid frequently is used as an eyewash to treat eye infections. The pH of a 0.050 M solution of boric acid is 5.28. What is the value of the boric acid ionization constant, Ka?

The first disinfectant used by Joseph Lister was called carbolic acid. This substance now is known as phenol, C6H5OH (pKa = 10.0). What is the pH of a 0.10 M solution of phenol?

The indicator bromophenol blue, HIn(aq), has a form that is yellow and an In– (aq) form that is blue. Write an equation to show how bromophenol blue acts as an indicator.

In the Brønsted–Lowry definition of acids and bases, an acid __________

A solution with a pOH of 4.3 has a [H+ ] of __________

What is the conjugate base of the HSO4 – (aq) ion?

If the pH of a solution increases by 2 units (e.g., from 1 to 3), then the ratio of the new to the original hydronium ion concentration is __________

Draw the titration curve that shows how the pH changes when a weak base is added to a strong acid

10 cm3 of 0.01 mol dm–3 nitric acid (HNO3 ) is diluted with 90 cm3 of water. What is the pH of the resulting solution?

Suggest one method, other than measuring pH, which could be used to distinguish between solutions of a strong acid and a weak acid of the same concentration. State the expected results.

When [H+ ] = 4.0 × 10–9 M in water at 25°C, then pH = __________

A solution with an [OH– ] concentration of 1.20 × 10–7 M has a pOH and pH of __________