Multiple Choice
Which of the following formulas represents an ionic compound?
1
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3. Chemical Reactions
Naming Ionic Compounds
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Which of the following is the correct chemical formula for copper(I) cyanide?
A
CuCN
B
Cu2CN
C
Cu(CN)2
D
CuC2N2
Verified step by step guidance1
Step 1: Identify the oxidation state of copper in copper(I) cyanide. The (I) indicates copper has a +1 charge, so copper is Cu⁺.
Step 2: Recognize the cyanide ion (CN⁻) has a charge of -1.
Step 3: To form a neutral compound, the total positive charge must balance the total negative charge. Since Cu⁺ is +1 and CN⁻ is -1, they combine in a 1:1 ratio.
Step 4: Write the chemical formula by combining one Cu⁺ ion with one CN⁻ ion, resulting in CuCN.
Step 5: Verify that the formula CuCN is electrically neutral and correctly represents copper(I) cyanide.
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