Scelta multipla
Which type of elements typically form cations?
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2. Atoms & Elements
Ions
Scelta multipla
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
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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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