Multiple Choice
What is the correct name for the ionic compound with the formula MnI_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 MgSO_3?
A
Magnesium thiosulfate
B
Magnesium sulfur trioxide
C
Magnesium sulfite
D
Magnesium sulfate
Verified step by step guidance1
Identify the cation and anion in the compound MgSO_3. The cation is Mg^{2+} (magnesium ion) and the anion is SO_3^{2-}.
Recognize that SO_3^{2-} is the sulfite ion, which is different from sulfate (SO_4^{2-}) and thiosulfate (S_2O_3^{2-}).
Recall the naming convention for ionic compounds: the cation name is stated first (magnesium), followed by the anion name without the word 'ion'.
Since the anion is sulfite (SO_3^{2-}), the correct name for MgSO_3 is magnesium sulfite.
Verify that the charges balance to form a neutral compound: Mg^{2+} and SO_3^{2-} combine in a 1:1 ratio, confirming the formula MgSO_3 corresponds to magnesium sulfite.
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