Multiple Choice
Which one of the following compounds contains the nitrite ion?
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3. Chemical Reactions
Naming Ionic Compounds
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Which statement correctly describes how the binary ionic compound CaCl2 is named?
A
The name is calcium chloride, with the metal (calcium) named first and the nonmetal (chlorine) named second with its ending changed to -ide.
B
The name is calcium dichloride, using prefixes to indicate the number of chloride ions.
C
The name is calcium chlorate, using the -ate ending for the nonmetal.
D
The name is calcium(II) chloride, using Roman numerals to indicate the charge of calcium.
Verified step by step guidance1
Step 1: Identify the type of compound CaCl2 is. Since it consists of a metal (calcium) and a nonmetal (chlorine), it is a binary ionic compound.
Step 2: Recall the naming rules for binary ionic compounds: the metal (cation) is named first using its elemental name, and the nonmetal (anion) is named second with its ending changed to '-ide'.
Step 3: Determine if prefixes are used. Prefixes like 'di-' are typically used for molecular (covalent) compounds, not ionic compounds, so they are not used here.
Step 4: Understand that Roman numerals are used in names only when the metal can have multiple oxidation states. Calcium has a fixed charge of +2, so Roman numerals are not necessary.
Step 5: Recognize that suffixes like '-ate' are used for polyatomic ions, not for simple binary ionic compounds like CaCl2.
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