Multiple Choice
Which of the following compounds contains the lead(II) ion?
2
views
3. Chemical Reactions
Naming Ionic Compounds
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What is the correct name for the ionic compound with the formula CuS?
A
Copper(II) sulfate
B
Copper(II) sulfide
C
Copper(I) sulfide
D
Copper(I) sulfate
Verified step by step guidance1
Identify the ions present in the compound CuS. Cu represents copper, and S represents sulfur.
Determine the charge on the sulfur ion. Sulfur typically forms sulfide ions with a charge of 2-, written as S^{2-}.
Since the compound is neutral overall, the copper ion must balance the 2- charge from sulfur. This means copper has a charge of 2+, written as Cu^{2+}.
Name the copper ion using its oxidation state in Roman numerals. Because copper is 2+, it is named Copper(II).
Combine the names of the cation and anion. The anion sulfide comes from sulfur with a 2- charge, so the correct name is Copper(II) sulfide.
2:11mWatch next
Master Ionic Compounds Naming with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Naming Ionic Compounds practice set
Problem sets built by lead tutorsExpert video explanations