18. Aqueous Equilibrium

In an acid-base test using litmus paper, what color does blue litmus indicate when the solution is basic?

Bromothymol blue is an acid-base indicator that changes color over a certain pH range. At approximately which pH value would bromothymol blue appear blue?

Phenolphthalein is an acid-base indicator. What color does phenolphthalein appear in a basic (alkaline) solution?

Which acid-base indicator is yellow in a solution with a pH of 9.8?

Bromothymol blue is an acid-base indicator that changes color over a specific pH range. In which pH condition does bromothymol blue appear yellow?