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From the following compounds choose the name / formula pair that is incorrectly matched.

A. sodium sulfite / Na₂SO₃
B. ammonium fluoride / NH₄F
C. copper(II) carbonate / CuCO₃
D. ferric chloride / FeCl₃
E. cuprous sulfide / Co₂S

User HannahMitt
by
7.5k points

1 Answer

6 votes

Final answer:

The name/formula pair that is incorrectly matched is E. cuprous sulfide / Co₂S. The correct formula for cuprous sulfide should be Cu₂S, not Co₂S, since 'Co' is the symbol for cobalt, whereas 'Cu' stands for copper.

Step-by-step explanation:

The student asked to identify the name/formula pair that is incorrectly matched from the following compounds:

  • A. sodium sulfite / Na₂SO₃
  • B. ammonium fluoride / NH₄F
  • C. copper(II) carbonate / CuCO₃
  • D. ferric chloride / FeCl₃
  • E. cuprous sulfide / Co₂S

The incorrect pair is E. cuprous sulfide / Co₂S. The correct formula for cuprous sulfide is Cu₂S, where 'cuprous' indicates copper(I). 'Co' stands for cobalt, which is not correct in this context. Instead, 'Cu' represents copper.

User Kennard
by
8.7k points
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