QQuestionChemistry
QuestionChemistry
Draw the Lewis structure for CHO^2 - on a piece of paper.
Note: CHO^2 - has resonance structures, and there are two forms of the drawn ion. Draw both structures.
Please draw a clear picture so it can be understood better.
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Answer
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Step 1:I'll guide you through drawing the Lewis structure for CHO^2 - (formate ion) step by step:
Step 2:: Count the total number of valence electrons
- Total valence electrons: $$4 + 1 + 12 + 1 = 18$$ electrons
- Carbon (C): 4 valence electrons - Hydrogen (H): 1 valence electron - Oxygen (O): 6 valence electrons × 2 = 12 valence electrons - Negative charge adds 1 electron
Step 3:: Arrange the atoms
- Place carbon in the center - Attach one hydrogen to the carbon - Place two oxygen atoms around the carbon
Step 4:: Connect atoms with single bonds
- Draw single bonds between:
Step 5:
Carbon and hydrogen
Step 6:
Carbon and first oxygen
Step 7:
Carbon and second oxygen
Step 8:: Distribute remaining electrons
- Remaining: $$18 - 6 = 12$$ electrons
- Initial bonding uses 6 electrons - Complete octets for oxygen atoms first
Step 9:: Create resonance structures
Two equivalent resonance structures exist: - One oxygen has a single bond and negative charge - The other oxygen has a single bond and negative charge - The structures are symmetrical
Final Answer
Note: A hand-drawn diagram would best illustrate these structures, showing the electron placement and resonance.
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