Question

1. what is the correct name for the acid with the formula hcl?

options: hydrochlorous acid, hydrogen chloride, hydrochloric acid, hydroiodic acid
(with a \clear all\ button)

Explanation:

To name an acid with the formula HCl (a binary acid, composed of hydrogen and a non - metal), we use the naming rule: "hydro - " + root name of the non - metal + " - ic acid". The non - metal in HCl is chlorine, and its root name is "chlor". So following the rule, the name should be hydrochloric acid.

• "Hydrochlorous acid" is incorrect as it is the name for HClO (hypochlorous acid related, with different oxidation state of Cl).
• "Hydrogen chloride" is the name of the gaseous compound, not the acid in aqueous solution.
• "Hydroiodic acid" is the name for HI (hydroiodic acid, with iodine, not chlorine).

Answer:

C. hydrochloric acid (assuming the third option is labeled C, with the option text "hydrochloric acid")