Question

An unknown solution changed the color of a phenolphthalein indicator from colorless to pink. What would you comment about the pH of the unknown solution?



The given solution is acidic in nature.



The given solution is basic in nature.



The given solution is neutral in nature.
@SummerNS

Answer 1

This compound’s color change happens through a process called ionization. Ionization occurs when a molecule gains or loses electrons, giving the molecule a negative or positive electric charge. Ionized molecules attract other molecules with the opposite charge and repel those with the same charge. With phenolphtalein, this also affects the molecule’s shape. The combination of shape and electric charge determine how a molecule responds to light. Normally, phenolphtalein is clear because all colors of light pass through it. When exposed to alkaline solutions, it begins to block the blue colors of the spectrum, which turns the light pinkish. The stronger the alkaline solution is, the more the phenolphthalein molecule changes and the darker the its pink hue will be.

Read more : http://www.ehow.com/how-does_5271431_phenolphthalein-change-color.html

Answer 2

So the solution is acidic ?

Answer 3

alkaline is basic

Answer 4

Oops , so B .