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Sodium hydroxide is a very reactive strong base. What is the chemical formula for sodium hydroxide?
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3. Chemical Reactions
Naming Ionic Compounds
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What is the correct name for the ionic compound Sr3N2?
A
Strontium nitride
B
Strontium nitrate
C
Strontium(II) nitride
D
Strontium dinitride
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Identify the cation and anion in the formula Sr3N2. Sr is strontium, a metal, and N is nitrogen, a nonmetal.
Determine the charges of the ions. Strontium typically forms a +2 charge (Sr^{2+}), and nitride is the N^{3-} ion.
Check the ratio of ions to balance the charges. Three Sr^{2+} ions give a total charge of +6, and two N^{3-} ions give a total charge of -6, so the formula Sr3N2 is charge balanced.
Name the cation first using the element name 'strontium' (no Roman numeral needed because strontium has only one common charge).
Name the anion by taking the root of the nonmetal and adding the suffix '-ide', so N^{3-} becomes 'nitride'. Therefore, the correct name is 'strontium nitride'.
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