Multiple Choice
What is the correct name for a compound consisting of two bromine atoms and one calcium atom?
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3. Chemical Reactions
Naming Ionic Compounds
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Which of the following is the correct name for the BrO4^- ion?
A
bromate
B
perbromate
C
hypobromite
D
bromite
Verified step by step guidance1
Step 1: Identify the central atom and the number of oxygen atoms in the ion. Here, the ion is BrO4^-, which contains bromine (Br) and four oxygen atoms.
Step 2: Recall the naming conventions for oxyanions of halogens. The suffixes and prefixes depend on the number of oxygen atoms: -ite indicates fewer oxygens, -ate indicates more oxygens, hypo- indicates fewer than -ite, and per- indicates more than -ate.
Step 3: Compare BrO4^- to other bromine oxyanions: bromite (BrO2^-), bromate (BrO3^-), and perbromate (BrO4^-). Since BrO4^- has the highest number of oxygen atoms, it uses the prefix 'per-' and the suffix '-ate'.
Step 4: Conclude that the correct name for BrO4^- is 'perbromate' because it follows the naming pattern for the halogen oxyanions with the most oxygen atoms.
Step 5: Verify that the other options (bromate, bromite, hypobromite) correspond to ions with fewer oxygen atoms and thus do not match BrO4^-.
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