Multiple Choice
Deodorants contain a compound called aluminum hydroxide. What is its chemical formula?
42
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
Which of the following is the correct chemical formula for the iron(II) ion?
A
Fe^{3+}
B
Fe^{+}
C
Fe_2^{+}
D
Fe^{2+}
Verified step by step guidance1
Understand that the Roman numeral in parentheses indicates the oxidation state (charge) of the ion. Here, iron(II) means iron has a +2 charge.
Recall that the chemical symbol for iron is Fe.
Combine the symbol Fe with the charge indicated by the Roman numeral II, which corresponds to a 2+ charge.
Write the ion with the charge as a superscript: \(Fe^{2+}\).
Verify that the charge matches the oxidation state given (II means +2), confirming that \(Fe^{2+}\) is the correct formula for the iron(II) ion.
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