객관식
Which of the following is the correct chemical formula for aluminum oxide?
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3. Chemical Reactions
Naming Ionic Compounds
객관식
Which metallic ion is present in copper(II) chloride?
A
Cl^{-}
B
Cu^{+}
C
Cl^{2+}
D
Cu^{2+}
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검증된 단계별 안내1
Identify the chemical formula given: copper(II) chloride is written as CuCl\_2.
Understand the Roman numeral in the name 'copper(II)' indicates the oxidation state of the copper ion, which is +2.
Recognize that chloride ions (Cl\^-) have a charge of -1 each.
Since there are two chloride ions, their total negative charge is 2 \(\times\) (-1) = -2, which balances the +2 charge of the copper ion.
Conclude that the metallic ion present in copper(II) chloride is Cu\^{2+}.
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