Module 4 Part G: Binary Ternary Acids

      Strong Acids                            Weak Acids

Strong acids ionize 100% in a water solution, while Weak Acids ionize less than 5% in a water solution.

There are Binary/Ternary Acid online homework for your practice for M-4 Part G:

G: Binary/Ternary Acid Names:

G!: Binary/Ternary Acid Names:

 Chapter 6 Bishop Sections 6.3-6.4 give you instructions for naming and writing formulas of acids.

A brief tutorial for names and formulas of acids follows:

If hydrogen is written first in a chemical formula, there is two ways to name the compound. As a pure molecular compound or as an aqueous acid:

If the compound is a pure molecular compound then you name it just as if it were an ionic compound:

HCl          hydrogen chloride

HClO        hydrogen hypochlorite

HClO2      hydrogen chlorite

HClO3      hydrogen chlorate

HClO4      hydrogen perchlorate

H3PO4     hydrogen phosphate

H2CO3     hydrogen carbonate

H2SO4      hydrogen sulfate

H2SO     hydrogen sulfite

HC2H3O2   hydrogen acetate 

H2C2O4    hydrogen oxalate

HBr          hydrogen bromide

HF            hydrogen fluoride   


Writing hydrogen first in a chemical formula indicates that when you dissolve the compound in water, a water molecule has the ability to pull the hydrogen off  (from strong electronegative elements like oxygen)  the molecule HXO3 and creating hydronium ions, H3O1+ and  a negative ion XO31- (cation).

The way you indicate this ionic solution is to write the formula followed by (aq) meaning a water solution:  HXO3 (aq) .

The first step is to drop the first word hydrogen and
add a second word

HCl          hydrogen chloride acid (aq)

HClO        hydrogen hypochlorite acid (aq)

HClO2      hydrogen chlorite acid (aq)

HClO3      hydrogen chlorate acid (aq)

HClO4      hydrogen perchlorate acid (aq)

H3PO4     hydrogen phosphate acid (aq)

H2CO3     hydrogen carbonate acid (aq)

H2SO4     hydrogen sulfate acid (aq)

H2SO3     hydrogen sulfite acid (aq)

HC2H3O2   hydrogen acetate acid (aq)

H2C2O4    hydrogen oxalate acid (aq)

HBr          hydrogen bromide acid (aq)

HF            hydrogen fluoride acid (aq)






The next step is to drop the suffix from the cation and make the following substitution with another suffix:

Change the -ate to -ic

Change the -ite to -ous

but the instead of coming up with a third suffix for -ide , they reused the -ic for -ide and added a prefix hydro- (Do not get this confused with the prefix hypo- which means 'under'.)

HCl          hydrochloric  acid (aq)

HClO        hypochlorous acid (aq)

HClO2      chlorous acid (aq)

HClO3      chloric  acid (aq)

HClO4      perchloric  acid (aq)

H3PO4     phosphoric  acid  (aq) (Put the -or- syllable back in the name)

H2CO3     carbonic  acid (aq)

H2SO4     sulfuric  acid  (aq) (Put the -ur- syllable back in the name)

H2SO3     sulfurous acid (aq) (Put the -ur- syllable back in the name)

HC2H3O2   acetic  acid (aq(Notice the three hydrogens written after carbon are NOT ionizable and not written first in the formula)

H2C2O4    oxalic acid (aq)

HBr          hydrobromic acid (aq)

HF            hydrofluoric acid (aq)

On Corwin page 190 Questions 47-54 will give you more practice on writing names and formulas of acids.