Question

question 27 (1 point) listen which of the following binary ionic compounds are paired with their correct iupac name? a) copper (iii) phosphide, co₃p₂ b) lithium (iii) nitride, li₃n c) iron (iii) bromide, febr₃ d) tin (ii) sulfide, sns₂ e) magnesium chloride, mgcl₂

Explanation:

• For option a: Copper(II) has a +2 charge, phosphide has a -3 charge. The correct formula should be $\text{Cu}_3\text{P}_2$, not $\text{Co}_3\text{P}_2$ (Co is cobalt).
• For option b: Lithium only has a +1 oxidation state, so it is lithium nitride, not lithium(III) nitride.
• For option c: Iron(III) has a +3 charge, bromide has a -1 charge. The formula $\text{FeBr}_3$ matches the name iron(III) bromide.
• For option d: Tin(II) has a +2 charge, sulfide has a -2 charge. The correct formula should be $\text{SnS}$, not $\text{SnS}_2$ (which is tin(IV) sulfide).
• For option e: Magnesium has a +2 charge, chloride has a -1 charge. The formula $\text{MgCl}_2$ matches the name magnesium chloride.

Answer:

c) iron (III) bromide, $\text{FeBr}_3$
e) magnesium chloride, $\text{MgCl}_2$