It's not accurate to say that all acids turn indicators pink. While some acids do turn certain indicators pink, this is not a universal property of all acids.

Here's a breakdown:

* Indicators are substances that change color in the presence of acids or bases. They are used to determine the pH of a solution.

* Different indicators have different color changes at different pH levels. Some indicators turn pink in acidic solutions, others turn red, blue, yellow, or other colors.

* The color change of an indicator depends on the chemical structure of the indicator and the pH of the solution.

* Not all acids turn the same indicator pink. For example, phenolphthalein is a common indicator that turns pink in basic solutions, but remains colorless in acidic solutions.

Here are some examples of common indicators and their color changes:

* Litmus paper: Red in acidic solutions, blue in basic solutions.

* Methyl orange: Red in acidic solutions, yellow in basic solutions.

* Phenolphthalein: Colorless in acidic solutions, pink in basic solutions.

In summary, the color change of an indicator in the presence of an acid is not a universal phenomenon. It depends on the specific indicator and the acid's pH.