An acid-base indicator ( ) has the acid form red and basic form blue
CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases
Problem
An acid-base indicator ( pKa=4.5271 ) has the acid form red and basic form blue. If we need 75% red to be converted into 75% blue form in solution, the change in pH of solution should be :
(1) 4.05
(2) 5.0
(3) 0.95
(4) 0.80