# Problem: Part A. The formate ion, HCO2− , is formed when formic acid dissolves in water. A number of possible resonance structures for this ion are shown. Which of these structures are valid and which are invalid? Drag each item to the appropriate bin.Often it is possible to write more than one correct electron-dot structure for a molecule or ion, differing only in the placement of valence electrons. The actual electronic structure of the species is a composite of all these contributing structures. This composite is referred to as a resonance hybrid and the species is said to exhibit resonance. The contributing resonance structures are shown being linked by a double-headed arrow (↔).

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Part A. The formate ion, HCO2 , is formed when formic acid dissolves in water. A number of possible resonance structures for this ion are shown. Which of these structures are valid and which are invalid?

Drag each item to the appropriate bin.

Often it is possible to write more than one correct electron-dot structure for a molecule or ion, differing only in the placement of valence electrons. The actual electronic structure of the species is a composite of all these contributing structures. This composite is referred to as a resonance hybrid and the species is said to exhibit resonance. The contributing resonance structures are shown being linked by a double-headed arrow (↔).