Multiple Choice
What is the correct name for the compound with the formula Cu(OH)_2?
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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 ZnS?
A
Zinc sulfide
B
Zinc(II) sulfur
C
Zinc sulfite
D
Zinc sulfate
Verified step by step guidance1
Identify the cation and anion in the formula ZnS. Zn is the cation (metal), and S is the anion (nonmetal).
Determine the charge of the cation. Zinc (Zn) typically forms a +2 charge, so it is Zn^{2+}.
Determine the charge of the anion. Sulfur (S) typically forms a -2 charge as sulfide, so it is S^{2-}.
Since the charges of Zn^{2+} and S^{2-} balance each other in a 1:1 ratio, the compound is neutral and no additional prefixes or Roman numerals are needed beyond the standard naming.
Name the compound by stating the cation name first (Zinc) followed by the anion name with the suffix '-ide' (Sulfide), resulting in Zinc sulfide.
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