Is phosphoric acid weak or strong?

Understand the Problem

The question is asking whether phosphoric acid is classified as a weak or strong acid, which involves understanding its dissociation in water and comparing its strength to other acids.

Answer

Weak acid.

The final answer is that phosphoric acid is a weak acid.

Answer for screen readers

The final answer is that phosphoric acid is a weak acid.

More Information

Phosphoric acid (H3PO4) is a weak acid because it does not completely dissociate in water. It has three ionizable hydrogen atoms, making it a triprotic acid, but each step of ionization does not go to completion.

Tips

A common mistake is to assume that because phosphoric acid can ionize in multiple steps, it is strong. However, full ionization in water is necessary to be classified as a strong acid.

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