Final answer:
In a titration between a strong acid and a strong base, the color at the equivalence point would be neutral as the pH is 7, resulting in a colorless to pink transition using phenolphthalein. Other indicators with a pKin between 4.0 and 10.0 are also suitable due to the rapid pH change at the equivalence point.
Step-by-step explanation:
At the equivalence point of a titration between a strong acid and a strong base, you would expect to see a neutral color that corresponds to a pH of 7. This is because the nature of the reaction between a strong acid and a strong base is to form water and a salt, which results in a neutral solution. Since phenolphthalein has a color change interval that encompasses the pH range of 8.2 to 10.0, it will change from its acidic color to its basic color in this region. In the case of titrating a strong acid with a strong base, the pH will increase rapidly at the equivalence point, allowing phenolphthalein to change from colorless to pink. It's also worth noting that indicators with pKin between about 4.0 and 10.0 will work well for this type of titration. Methyl red, with a pKin of 5.0, will also display a visible color change from red to yellow as the pH passes through the equivalence point. However, considering the steep pH change at the equivalence point during a strong acid-strong base titration, many indicators are suitable because the solution quickly passes through their color change interval.