Question

name the compound first as if it were ionic compound

• no prefixes
• cation written first
• anion ending changed to -ide (unless it is a polyatomic)

step 2:

• if the ionic name is:
• hydrogen ate then the correct acid name is hydro - ic acid
• example: hcl(aq)→hydrogen chloride→hydrochloric acid
• if the ionic name is:
• hydrogen ite then the correct acid name is ous acid
• example: hclo3(aq)→hydrogen chlorite→chlorous acid
• if the ionic name is:
• then the correct acid name is acid
• example: hclo2(aq)→→

practice

• hbr(aq)
• h2co3(aq)
• h2so3(aq)
• hydrofluoric acid
• sulfuric acid
• nitrous acid

hi(aq)
a) hydroiodic acid
b) hydrogen iodide
c) iodic acid
d) iodous acid
hcl(aq)
a) hydrogenchloric acid
b) hydrogen chloride
c) hydrochloric acid
d) chlorous acid
h2so3(aq)
a) hydrosulphuric acid
b) hydrogen sulphate
c) sulphuric acid
d) sulphurous acid
hno3(aq)
a) nitrous acid
b) nitric acid
c) hydronitrous acid
d) nitrate acid
hio3(aq)
a) iodic acid
b) iodous acid
c) iodate acid
d) hydroiodic acid
hydrobromic acid
nitrous acid
carbonic acid
phosphoric acid

Explanation:

Step1: Recall naming rules for acids from ionic - compound names

If the ionic name has a simple anion (ends in - ide), the acid name starts with hydro - and ends with - ic acid. If the ionic name has an anion with an oxygen - containing polyatomic ion ending in - ite, the acid name ends in - ous acid. If the ionic name has an anion with an oxygen - containing polyatomic ion ending in - ate, the acid name ends in - ic acid.

Step2: Analyze each compound

For HBr(aq):

The ionic form would be hydrogen bromide. So the acid name is hydrobromic acid.

For H₂CO₃(aq):

The ionic form of the anion is carbonate ($CO_{3}^{2 - }$). So the acid name is carbonic acid.

For H₂SO₃(aq):

The ionic form of the anion is sulfite ($SO_{3}^{2 - }$). So the acid name is sulfurous acid.

For hydrofluoric acid:

The ionic form is hydrogen fluoride.

For sulfuric acid:

The ionic form of the anion is sulfate ($SO_{4}^{2 - }$).

For nitrous acid:

The ionic form of the anion is nitrite ($NO_{2}^{-}$).

For HI(aq):

The ionic form is hydrogen iodide, and the acid form is hydroiodic acid.

For HCl(aq):

The ionic form is hydrogen chloride, and the acid form is hydrochloric acid.

For H₂SO₃(aq):

The acid name is sulfurous acid.

For HNO₃(aq):

The ionic form of the anion is nitrate ($NO_{3}^{-}$), and the acid name is nitric acid.

For HIO₃(aq):

The ionic form of the anion is iodate ($IO_{3}^{-}$), and the acid name is iodic acid.

Answer:

HBr(aq): hydrobromic acid
H₂CO₃(aq): carbonic acid
H₂SO₃(aq): sulfurous acid
hydrofluoric acid: hydrogen fluoride
sulfuric acid: hydrogen sulfate
nitrous acid: hydrogen nitrite
HI(aq): a. hydroiodic acid
HCl(aq): c. hydrochloric acid
H₂SO₃(aq): d. sulfurous acid
HNO₃(aq): b. nitric acid
HIO₃(aq): a. iodic acid
Hydrobromic acid: hydrogen bromide
Nitrous acid: hydrogen nitrite
Carbonic acid: hydrogen carbonate
Phosphoric acid: hydrogen phosphate