Multiple Choice
Which type of elements typically form cations?
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Table of contents
- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
- Physical & Chemical Changes19m
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- Complex Ions5m
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- Crystal Field Theory Summary8m
- Magnetic Properties of Complex Ions9m
- Strong-Field vs Weak-Field Ligands6m
- Magnetic Properties of Complex Ions: Octahedral Complexes11m
2. Atoms & Elements
Ions
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
When MgBr_2 is dissolved in water, how many ions are produced from one formula unit?
A
1 ion
B
3 ions
C
2 ions
D
4 ions
Verified step by step guidance1
Identify the chemical formula of the compound: MgBr_2 consists of one magnesium ion (Mg^{2+}) and two bromide ions (Br^{-}).
Understand that when an ionic compound dissolves in water, it dissociates into its constituent ions.
Write the dissociation equation for MgBr_2 in water: $\mathrm{MgBr_2 (s) \rightarrow Mg^{2+} (aq) + 2Br^{-} (aq)}$.
Count the total number of ions produced from one formula unit: 1 Mg^{2+} ion + 2 Br^{-} ions = 3 ions.
Conclude that dissolving one formula unit of MgBr_2 produces 3 ions in solution.
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