Explanation:
Do the step 3 as outlined in the lab guide. record your results in the appropriate blank.
D
Answer is: a) in the presence of a base.
Phenolphthalein is colorless in acidic solutions and pink in basic solutions.
Acid-base indicators are usually weak acids or bases and they are chemical detectors for hydrogen or hydronium cations.
Example for acid-base indicator is phenolphthalein (molecular formula C₂₀H₁₄O₄).
When solution turns phenolphthalein pink, it means it is basic (pH>7).
<span>bright yellow light and lots of heat-energy.</span>
1. condensation
2. evaporation
3. precipitation
4. transpiration
5. dew
