It should look like it is becoming closer to the color of the control. Since the ammonia made the indicator change color in one direction, the vinegar is making it change color back to the way it was.

A pH or acid-base indicator is a compound that changes color depending on the pH of the substance that is added to it. Acids and bases make pH indicators turn different colors. Two substances that ...

Since his first term, Trump has wanted to change Air Force One's color scheme to red, white, and blue, but his request was denied due to regulatory restrictions, engineering challenges, and increased ...