Question

Acids when dissolved in water produce ________.

Answer 1

• An acid is any hydrogen-containing substance that is capable of donating a proton (hydrogen ion) to another substance.
• An acid is basically a molecule that can donate a ${\mathrm{H}}^{+}$ ion and can remain energetically favourable after a loss of ${\mathrm{H}}^{+}$.
• Acids are known to turn blue litmus red.

Example: Hydrochloric Acid $\left(\mathrm{HCl}\right)$ is a strong acid that dissociates to give ${\mathrm{H}}^{+}$ and ${\mathrm{Cl}}^{-}$ions

$\mathrm{HCl}\left(\mathrm{aq}\right)\rightleftharpoons {\mathrm{H}}^{+}\left(\mathrm{aq}\right)+{\mathrm{Cl}}^{-}\left(\mathrm{aq}\right)$

Therefore, acids when dissolved in water produce hydrogen ions.