An indicator, HIn, shows a color change from blue to yellow, depending on the acidity of the solution:
HIn (aq) H+ (aq) + In- (aq)
(blue) (yellow)
a. blue
b. yellow
c. no color change
Answer: b. yellow
HIn (aq) H+ (aq) + In- (aq)
(blue) (yellow)
What color will the indicator change when NaOH is added?
a. blue
b. yellow
c. no color change
Answer: b. yellow