Multiple Choice
What is the correct name for the compound with the formula NH_4CH_3COO?
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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 MnI_2?
A
Magnesium iodide
B
Manganese(III) iodide
C
Manganese(II) iodide
D
Manganese diiodide
Verified step by step guidance1
Identify the cation and anion in the formula MnI_2. Here, Mn is the metal cation (manganese) and I is the anion (iodide).
Determine the charge of the iodide ion. Iodide (I^-) is a halide ion with a charge of -1.
Since there are two iodide ions, the total negative charge is 2 × (-1) = -2. To balance this, the manganese cation must have a charge of +2.
Use the Roman numeral system to indicate the charge of the manganese cation in the compound name. Because manganese has a +2 charge here, it is named Manganese(II).
Combine the cation and anion names to form the full name: Manganese(II) iodide. This correctly reflects the formula MnI_2.
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