Ethanoic acid (also known as acetic acid) is a weak acid. When added to universal indicator, it will turn the indicator slightly reddish or orange.

Here's why:

* Universal indicator changes color depending on the pH of the solution.

* Acids have a pH lower than 7.

* Ethanoic acid is a weak acid, meaning it doesn't fully ionize in solution and doesn't release as many hydrogen ions (H+) as a strong acid like hydrochloric acid. This means it will be less acidic than a strong acid.

Therefore, the color change with universal indicator will be subtle, leaning towards the reddish-orange side of the pH scale, indicating a slightly acidic solution.