Acid and bases - Indicators
And acid-base indicator is a substance that displays displays different colors when in the presence of an acid or a base.
Answer:
In order to answer we have to see the results for each indicator.
1. For Thymol blue: turns yellow, so we know the pH of the solution must be between 2,8 and 8.
2. For Methyl orange: turns yellow, so we know it must be between 4.6 and 8 (according to the previuos result).
3. For Methyl red: turns yellow, so it must be between 6.3 and 8 (according to the previous results)
4. For Bromothymol blue: turns green, so it must be between 6.3 and 7.8 (according to the previous results).
As we can see the only pH that matches the result is 7.3, 1.