H3PO4 (phosphoric acid) is acidic in solution. It's a weak acid, meaning it doesn't fully dissociate into ions when dissolved in water. Phosphoric acid can donate three hydrogen ions (H+) to water, making it a triprotic acid. Also, ammonium chloride (NH4Cl) is acidic in solution. This is because NH4Cl is formed from a strong acid (HCl) and a weak base (NH3), and the ammonium ion (NH4+) acts as a weak acid when dissolved in water, causing the solution to have a lower pH than 7.
Both H3PO4 (phosphoric acid) and NH4Cl(ammonium chloride) are acidic in solution, but we can say NH4Cl is more acidic due to the hydrolysis of the ammonium ion. H3PO4 (phosphoric acid) is acidic in solution as well. It's a weak acid, meaning it doesn't fully dissociate into ions when dissolved in water.