Which rule should be followed when naming binary acids? use a prefix for the number of hydrogens. start the name with hydro-. change -ate to -ic. change -ous to -ite.

Answer is: Start the name with hydro-.

Binary acids are chemical compounds in which hydrogen is combined with a second nonmetallic element.

The names of binary acids begin with hydro- followed by the name of the other element modified to end with -ic.

For examples:

HCl is hydrochloric acid.

HBr is hydrobromic acid.

H₂S is hydrosulfuric acid

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