Questions for Disturbing Equilibrium 1. What is the color of bromophenol blue in an acid? In a base? 2. How did you get the solution to change from blue to yellow? 3. Why did the solution change from blue to yellow (what chemical reaction happened)? 4. How did you get the solution to change from yellow to blue? 5. Why did the solution change from yellow to blue (what chemical reaction happened)? 6. After Procedure Step 3, the solution in Well A1 was in equilibrium. What happened to the solution in Well A1 during Procedure Step 5? Did the equilibrium shift? Explain this on the basis of the Le Chatelier Principle? 7. Why did the colors in the Wells A1 and A3 change a second time in Procedure Steps 7 and 8? Was this because of reversible reactions?