SCH 3U/4C - Nomenclature - Tertiary & Tetrary Compounds

There are a few compounds that are not binary compounds, but they do end in ‘-ide’.  These compounds contain ions that have a special name given to that particular grouping of atoms. 

OH^-        hydroxide

CN^-        cyanide

NH₄⁺      ammonium

There are other groupings of atoms, called the complex or polyatomic anions, that have specific names and valences associated with them.  The substances that contain all these ions are called tertiary and tetrary compounds because the compounds will contain three or four different elements.

NO₃^-         nitrate

ClO₃^-        chlorate

BrO₃^-        bromate

IO₃^-           iodate

C₂H₃O₂^-   acetate

CO₃^2-       carbonate

SO₄^2-        sulfate

PO₄^3-        phosphate

MnO₄^-       permanganate

CrO₄^2-       chromate

Cr₂O₇^2-     dichromate

Rules for Writing a Name from a Formula

1.     Write exactly the same way as for binary compounds.

2.    Apply the Stock rules if the first element has more than one valence.

ex.(a)  NaCN               sodium cyanide

     (b)  Fe(OH)₃           iron (III) hydroxide

     (c)  NH₄NO₃           ammonium nitrate

     (d)  MgSO₄            magnesium sulfate

     (e)  Pb(NO₃)₂         lead (II) nitrate

         

Rules for Writing a Formula from a Name

1.     Write exactly the same way as for binary compounds.

2.    Apply the Stock rules if necessary.

Ex.     (a)  calcium hydroxide            Ca²   OH¹  ↝  Ca(OH)₂

          (b)  ammonium sulfide            NH₄⁺   S²  ↝  (NH₄)₂S

          (c)  copper (II) cyanide           Cu²   CN¹  ↝  Cu(CN)₂

          (d)  cobalt (II) nitrate               Co²   NO₃¹  ↝  Co(NO₃)₂

          (e)  magnesium phosphate     Mg²   PO₄³  ↝  Mg₃(PO₄)₂

 

 

Want to learn more about tert and tet?  You bet!

  

Homework

 

Give the correct formula for the following.

1.     iron (III) sulfate

2.    copper (I) iodate

3.    ammonium phosphate

4.    sodium cyanide

5.    magnesium carbonate

6.    lead (II) bromate

7.    mercury (I) nitrate

8.    nickel (II) acetate

9.    tin (IV) phosphate

10.  iron (II) hydroxide

11.  zinc hydroxide

12.  chromium (III) iodate

13.  sodium phosphate

14.  potassium permanganate

15.  sodium dichromate

16.  hydrogen sulfate

17.  barium chromate

18.  tin (II) nitrate

19.  silver acetate

20. calcium hydroxide

21.  zinc nitrate

22. sodium carbonate

23. magnesium sulfate

24. hydrogen chlorate

25. silver nitrate

26. mercury (I) cyanide

27. ammonium phosphate

28. cesium bromate

29. silver acetate

30. aluminum sulfate

Give the correct name for the following.

1.     KNO₃

2.    CuCN

3.    Na₂SO₄

4.    NH₄Cl

5.    CaCO₃

6.    Al(IO₃)₃

7.    FePO₄

8.    Ba(OH)₂

9.    As(C₂H₃O₂)₅

10.  Sb(NO₃)₃

11.  CrCO₃

12.  ZnSO₄

13.  AlPO₄

14.  Pb(CN)₂

15.  NH₄NO₃

16.  AgNO₃

17.  NaOH

18.  HgClO₃

19.  BaSO₄

20. NH₄ClO₃

21.  KOH

22. HNO₃

23. Al₂(SO₄)₃

24. Pb(OH)₂

25. CsOH

26. NH₄IO₃

27. KMnO₄

28. Na₂Cr₂O₇

29. Zn(NO₃)₂

30. FeCO₃

 

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