Acids and bases

Question 1

what is meant by the equivalence point in a titration?

Answer 1

when sufficient base has been added to just neutralise the acid (or vice versa)

Question 2

relationship between pH and pKa

Answer 2

pH = pKa

Question 3

picking a suitable indicator

Answer 3

the indicator needs to change colour at exactly the end point of the titration, so pick one that changes colour over a narrow pH range that lies entirely on the vertical part of the pH curve