What property is associated with carboxylate salts in terms of litmus tests?

The property associated with carboxylate salts in terms of litmus tests is that they can turn red litmus blue. This is because carboxylate salts are typically derived from weak acids (like carboxylic acids) and strong bases. When dissolved in water, they can produce hydroxide ions, resulting in a basic solution.

The presence of hydroxide ions raises the pH of the solution, which can change the color of red litmus paper to blue, indicating a basic or alkaline environment. This is a hallmark characteristic of many salts formed from weak acids and strong bases.

In contrast, salts that do not significantly change the pH, or those that are derived from strong acids and weak bases, would not produce a change in color in litmus tests. Therefore, the ability of carboxylate salts to turn red litmus blue confirms their basic nature in aqueous solutions.