Multiple Choice
Which type of compound is CuSO_4?
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3. Chemical Reactions
Naming Ionic Compounds
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What is the correct name for the ionic compound with the formula ZnF_2?
A
zinc(II) fluorine
B
zinc(II) fluoride
C
zinc difluoride
D
zinc fluoride
Verified step by step guidance1
Identify the cation and anion in the formula ZnF_2. Zn is the cation (metal), and F is the anion (nonmetal).
Determine the charge on the cation. Zinc commonly forms a +2 charge, so Zn is Zn^{2+}.
Determine the charge on the anion. Fluoride (F) is the ion formed by fluorine with a -1 charge, so F^{-}.
Since the formula is ZnF_2, two fluoride ions balance the +2 charge of one zinc ion, confirming the charges.
Name the compound by stating the cation name first (zinc) and then the anion name with the suffix '-ide' (fluoride). Because zinc has a fixed charge of +2, the Roman numeral (II) is included: zinc(II) fluoride.
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