Question

A student performed an activity in which 200 ml of lime water is taken. Few drops of phenolphthalein are added to lime water. The solution turns pink. The student blows air into this beaker with a straw and observed a color change
1. Why did the lime water turn pink?
2. What was the color change observed when the student passed air through the beaker?
3. Why did the change occur in the second case? Plz ans as fast as u can

Answer 1

Explanation:

1) Lime water is a base, so when the phenolphthalein was added to the solution, it turned the solution pink. When enough carbonic acid is formed it neutralizes the lime water, which is a base and makes the solution an acid.

Answer 2

Answer:

 1.  Phenophthalein  when added to a base gives pink colour. Scince lime water is a base therefore the colour of the solution turns pink

2. When enough carbonic acid is formed it neutralizes the lime water      (base) and makes the solution an acidic. Since the solution is acidic, therefore the solution turns colourless.

Explanation: