Answer:
Step-by-step explanation:
An acid is a substance that can donate protons (H+) to water when dissolved in it, resulting in an increase in the concentration of H+ ions in the solution.
When NaCl (sodium chloride) is dissolved in water, it dissociates into its individual ions, Na+ and Cl-. These ions do not donate protons to water, so NaCl does not form an acid when dissolved in water.
NO2 (nitrogen dioxide) is a neutral compound, it does not donate protons to water and does not form an acid when dissolved in water.
H2SO3 (sulfurous acid) is an acid, when dissolved in water, it donates protons to water and forms H+ ions and SO3- ions.
HCl (hydrochloric acid) is an acid, when dissolved in water it donates protons to water and forms H+ ions and Cl- ions.
So the answer is H2SO3 and HCl are the compounds that would form an acid when dissolved in water as an aqueous solution.