Question 5
Phenolphthalein is used as an acid or base indicator wherein contact or presence of acid will turn colorless and with base, it will turn into a pinkish violet color. The color transition of this indicator is shown below.
| pH | < 0 | 0–8.2 | 8.3–12.0 | > 12.0 |
| --- | --- | --- | --- | --- |
| Colour | orange | colourless | pink to fuchsia | colourless |
Using phenolphthalein as an indicator, predict the color of the following solution. Write your answer in the blanks provided in the answer sheet.
A. strongly basic solution
B. near neutral solution
C. strongly acidic solution
D. water
E. orange juice
| pH | < 0 | 0–8.2 | 8.3–12.0 | > 12.0 |
| --- | --- | --- | --- | --- |
| Colour | orange | colourless | pink to fuchsia | colourless |
Using phenolphthalein as an indicator, predict the color of the following solution. Write your answer in the blanks provided in the answer sheet.
A. strongly basic solution
B. near neutral solution
C. strongly acidic solution
D. water
E. orange juice