Question

Match the name of the ionic compound with the correct formula.

A. iron (II) nitride

B. iron (III) nitride

C. iron (II) sulfide

D. iron (III) sulfide

E. iron (III) chloride

F. iron (II) chloride

G. not correct; the 2s need to cancel.

H. not correct; the 3s need to cancel.

selectABCDEFGH	1. FeS
selectABCDEFGH	2. Fe2S3
selectABCDEFGH	3. FeCl2
selectABCDEFGH	4. FeCl3
selectABCDEFGH	5. Fe3N2
selectABCDEFGH	6. FeN
selectABCDEFGH	7. Fe2S2
selectABCDEFGH	8. Fe3N3

Answer 1

N has a charge 3- and Fe has a charge +2 in Fe(II) and +3 in Fe(III), S has a charge -2 and Cl has a charge -1. These charges would get crossed in writing the formula.

A. Iron (II) nitride - 5. Fe3N2

B. Iron (III) nitride - 6. FeN

C. Iron (II) sulphide - 1. FeS

D. Iron (III) sulphide - 2. Fe2S3

E. Iron (III) chloride - 4. FeCl3

F. Iron (II) chloride - 3. FeCl2

G. Not correct, the 2 needs to cancel - Fe2S2

H. Not correct, the 3 needs to cancel - Fe3N3