Consider an indicator that ionizes as shown for which its

Kₐ = 1.0 x 10⁻⁴ HIn (Yellow) + H₂O ⇌ H₃O⁺ + ln⁻(red)

Which of the following statements are true.

a) The predominant color when in the acid range is yellow.
b) In the middle of the pH range of its color change a solution containing the indicator will probably be orange.
c) At pH = 7.00, a solution containing this indicator (and no other colored species) will be red.
d) At pH = 7.00, most of the indicator is in the un-ionized form
e) The pH at which the indicator changes color is pH ~4.