Which is true about weak acids in solution?

Weak acids are characterized by their incomplete dissociation in solution. When a weak acid is dissolved in water, it only partially ionizes, resulting in a mixture of undissociated acid molecules and their corresponding ions in equilibrium. This means that not all the acid molecules release protons (H⁺ ions), which is a key factor in the behavior of the solution. Consequently, the presence of weak acids affects the pH of the solution, but it does not result in a fully acidic environment like strong acids do, which completely ionize and produce higher concentrations of H⁺ ions.

In contrast, strong acids fully dissociate in solution, which is why the property of weak acids is specifically marked by their partial dissociation. Furthermore, while weak acids can react with strong acids in certain contexts, forming salts is not a universal trait of their behavior in solution. However, their effect on pH is significant, as weak acids will influence the acidity of the solution while still maintaining a balance of undissociated and dissociated species.