Question

An acid-base indicator usually has pH transition range of about 2 pH unit. *

a) True
b) False​

Answer 1

Answer:

TRUE

Therefore, the indicator changes color over a 2 pH unit range. If the indicator has a Ka of 1×10−6, the indicator will change color in passing from pH 5 to pH 7. It is also possible for the indicator to have more that one ionization and hence more than one color transition.