Multiple Choice
What is the correct name for the compound SrCl_2?
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3. Chemical Reactions
Naming Ionic Compounds
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Which of the following is the correct chemical formula for tin(IV) chromate?
A
Sn2(CrO4)3
B
SnCrO4
C
Sn2(CrO4)4
D
Sn(CrO4)2
Verified step by step guidance1
Identify the oxidation state of tin in tin(IV) chromate. The Roman numeral IV indicates that tin has a +4 charge, so the ion is Sn^{4+}.
Determine the charge of the chromate ion. The chromate ion, CrO_4, carries a -2 charge, so it is CrO_4^{2-}.
Balance the total positive and negative charges to form a neutral compound. Since Sn^{4+} has a +4 charge and CrO_4^{2-} has a -2 charge, you need two chromate ions to balance one tin ion.
Write the chemical formula by combining one Sn^{4+} ion with two CrO_4^{2-} ions, resulting in Sn(CrO_4)_2.
Verify that the total positive charge (+4 from Sn) equals the total negative charge (2 × -2 from two chromate ions), confirming the formula is electrically neutral.
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