Choose Arrhenius Acids among the following compounds.

How does calcium metal react with dilute ?
Which salt is formed when HCl reacts with ?
How will you justity that HSO , is a Bronsted - Lowry acid?
Why is HCl not edible although it is present in the stomach
for digestion of food?

When considering Arrhenius acids, we look for compounds that produce hydrogen ions ( ) when dissolved in water. From your list, and (likely referring to sulfuric acid rather than ) are identified as Arrhenius acids, as they dissociate to release ions. is also an Arrhenius acid which produces when dissolved in water, while can act as both an acid and a base but is not classified strictly as an Arrhenius acid.

When calcium metal reacts with dilute , it undergoes a vigorous reaction, producing hydrogen gas and calcium sulfate. The reaction can be represented as:

This visible release of hydrogen gas showcases how reactive calcium is with acids, and you’ll often observe bubbles forming during the process.

When hydrochloric acid reacts with barium carbonate , it yields barium chloride , water, and carbon dioxide gas. The reaction can be summarized as:

This reaction highlights how acids can interact with carbonates to produce gas as a byproduct, which is always a fun surprise in chemistry!

To justify that (the bisulfite ion) is a Brønsted-Lowry acid, one can point out that it can donate a proton ( ) to a base. For example, in an aqueous solution, it can donate a proton to water, forming and hydronium ion. Thus, it clearly fits within the Brønsted-Lowry definition of acids as proton donors.

As for HCl, while it’s indeed present in the stomach for digestion, its high acidity means that direct contact with the stomach lining can cause damage. The stomach is lined with a protective mucous layer that prevents HCl from harming the tissue while allowing it to help digest food. So, while it’s crucial for digestion, too much exposure is not a good thing!