0 7. The table below shows the color of the indicators methyl orange and litmus in two samples of the same solution.
Results of Acid-Base Indicator Tests
Color Result from the
Indicator
Indicator Test
methyl orange
yellow
bromthymol blue yellow
Which pH value is consistent with the indicator results?
5
10
O
1

Acid-base indicators are generally weak proteolytic that change color in solution according to the pH. The acid-base equilibrium of a weak acid type of indicator (HI) in water can be represented as. [I] The acid, HI, and the conjugate base, I−, have different colors. The equilibrium expression for this process is.