Question

What do you understand by the term hydronium ion? Name a class of compound that forms hydronium ions with water .​

Answer 1

Answer:

According to Arrhenius' concept of acids, an acid is such a compound which when dissolved in water, releases proton(s) or H+ . Now as an Arrhenius acid releases H+ , the proton combines with a H2O molecule to produce a H3O+ ion which is an hydronium ion.

Answer 2

Answer:

• The form of hydrogen ions present in aqueous solution is the hydrogen ion bound to a water molecule.

• The hydronium ion ($H_3O^+$), usually known as protonated water, is present in all acidic aqueous solutions.

• In addition to water dissociating, hydronium also develops when water is in the presence of an acid.

• The H+ ions join with water molecules to generate hydronium as the acid dissociates.

• Substances which form hydronium ions ( $H_3O^+$) in water are known as Arrhenius Acids.

• A substance is considered an acid, in accordance with Arrhenius' notion of acids, if it dissolves in water and produces protons or H+ ions.

• Example of Arrhenius Acids - HCL and $H_2 SO_4$.

Hence, Substances which form hydronium ions ( $H_3O^+$) in water are known as Arrhenius Acids.

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