Question

question 28 (1 point) listen which of the following binary ionic compounds are paired with their correct iupac name? a) aluminum chloride, alcl₂ b) lead (iv) oxide, pbo₂ c) copper (iii) phosphide, cu₃p₂ d) potassium cyanide, kcn e) lithium (i) nitride, li₃n

Explanation:

• For option a: Aluminum has a +3 charge, so the correct formula is $\text{AlCl}_3$, not $\text{AlCl}_2$.
• For option b: Lead(IV) has a +4 charge, oxide has a -2 charge. The correct formula should be $\text{PbO}_2$, but lead(IV) oxide is $\text{PbO}_2$, however, $\text{PbO}_2$ is commonly called lead dioxide, and the IUPAC name matches, but we check charges: $+4 + 2(-2)=0$, but let's check others.
• For option c: Copper(III) has a +3 charge, phosphide has a -3 charge. The correct formula should be $\text{Cu}_3\text{P}_3$ simplified to $\text{CuP}$, not $\text{Cu}_3\text{P}_2$.
• For option d: Potassium has a +1 charge, cyanide ($\text{CN}^-$) has a -1 charge. The formula $\text{KCN}$ is correct, and the IUPAC name potassium cyanide matches.
• For option e: Lithium only has a +1 charge, so the Roman numeral (I) is unnecessary, and the correct name is lithium nitride, not lithium(I) nitride.

Answer:

d) potassium cyanide, KCN