Multiple Choice
Which of the following is the correct chemical formula for the ionic compound formed when iron reacts with chlorine?
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3. Chemical Reactions
Writing Ionic Compounds
Multiple Choice
Which of the following is the correct chemical formula for copper(II) sulfate?
A
CuSO3
B
Cu2SO4
C
CuSO4
D
Cu2(SO4)3
Verified step by step guidance1
Identify the charge on the copper ion in copper(II) sulfate. The (II) indicates copper has a +2 charge, so the ion is Cu^{2+}.
Recognize the sulfate ion, which is SO_4^{2-}, carrying a -2 charge.
Since copper(II) has a +2 charge and sulfate has a -2 charge, they combine in a 1:1 ratio to balance the charges.
Write the chemical formula by placing the copper ion and sulfate ion together without any additional subscripts, resulting in CuSO_4.
Verify that the formula CuSO_4 is electrically neutral, confirming it as the correct formula for copper(II) sulfate.
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