The indicator phenolphthalein has a pH range of 8.2 to 10.0 over which it undergoes a color change from colorless to pink.

Question

What color will the indicator be in a solution of hydrochloric acid? 

 

1. Colorless

 

2. Pink

 

3. Red

 

4. Blue

 

5. The color depends on the concentration of the hydrochloric acid 

 

We think it's red thanks

Answer 1

It's colorless in solutions with pH less than 8.2.  By definition, HCl, a strong acid, will have a low pH - less than 7 for sure.