A 50.00-mL solution of 0.0626 M ethanolamine ( Kb = 3.2 × 10–5) is titrated with a 0.0327 M solution of hydrochloric acid as the titrant. What is the pH of the base solution after 20.97 mL of titrant have been added? ( Kw = 1.00 × 10–14)

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent