Question

Which acid-base chemical reaction is irreversible?
A. strong acid added to water
B. water on its own
C. weak acid added to water
D. weak base added to water

Answer 1

The irreversible acid-base chemical reaction among the options provided is:

**A. strong acid added to water.**

In this case, when a strong acid (like hydrochloric acid, HCl) is added to water, it completely dissociates into its ions and does not revert back to the undissociated form under normal conditions.

In contrast, weak acids and weak bases only partially dissociate in water, making their reactions reversible. Water on its own does not involve any acid-base reaction.