Multiple Choice
Which of the following is the correct chemical formula for the ionic compound formed when iron reacts with chlorine?
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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