Phenol Red Indicator Changes from Yellow to Red in the PH

Multiple Choice

Phenol red indicator changes from yellow to red in the pH range from 6.6 to 8.0.State what color the indicator will assume in the following solution: 0.10 M NaCN(aq) .

A) red
B) yellow
C) red-yellow mixture
D) The indicator is its original color.
E) There is not enough information to answer this question.