Multiple Choice
What is the correct name for the ionic compound AlPO_4?
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3. Chemical Reactions
Naming Ionic Compounds
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Which of the following is the correct chemical formula for titanium(IV) sulfide?
A
TiS
B
Ti2S4
C
TiS2
D
Ti2S
Verified step by step guidance1
Identify the oxidation state of titanium in titanium(IV) sulfide. The Roman numeral IV indicates that titanium has a +4 charge, so Ti is Ti^{4+}.
Determine the charge on the sulfide ion. Sulfide (S) typically has a charge of 2-, so S is S^{2-}.
Balance the total positive and negative charges to form a neutral compound. Since Ti is +4 and S is -2, you need two sulfide ions to balance one titanium ion: +4 from Ti and 2 × (-2) = -4 from two sulfides.
Write the chemical formula by combining one Ti^{4+} ion with two S^{2-} ions, resulting in TiS_2.
Verify that the formula TiS_2 is electrically neutral and correctly represents titanium(IV) sulfide.
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