'''Phosphoric acid''' is an [[acid]] having the [[chemical formula]] H<sub>3</sub>PO<sub>4</sub>. It is used to prepare [[fertilizer]]s so that they contain [[phosphorus]]. | '''Phosphoric acid''' is an [[acid]] having the [[chemical formula]] H<sub>3</sub>PO<sub>4</sub>. It is used to prepare [[fertilizer]]s so that they contain [[phosphorus]]. |