Multiple Choice
What is the correct chemical formula for the ionic compound formed between barium and bromine?
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3. Chemical Reactions
Naming Ionic Compounds
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Which of the following is the correct chemical formula for lead(IV) chloride?
A
PbCl2
B
Pb4Cl
C
Pb2Cl4
D
PbCl4
Verified step by step guidance1
Identify the oxidation state of lead in lead(IV) chloride. The Roman numeral IV indicates that lead has a +4 charge (Pb^{4+}).
Determine the charge of the chloride ion. Chloride (Cl) is a halide ion with a charge of -1 (Cl^{-}).
Balance the total positive and negative charges to form a neutral compound. Since lead has a +4 charge, you need four chloride ions each with a -1 charge to balance it out.
Write the chemical formula by combining one Pb^{4+} ion with four Cl^{-} ions, resulting in PbCl_4.
Verify that the formula is electrically neutral: (+4) + 4(-1) = 0, confirming that PbCl_4 is the correct formula for lead(IV) chloride.
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