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What is the molecular geometry of H2CO?

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Quick Answer

Formaldehyde, also known as H2CO, has trigonal planar geometry. This molecule consists of two single-bonded hydrogens attached to a carbon center that also has an oxygen double bond attached to it. The three atoms can only form three points around the carbon.

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Full Answer

Formaldehyde forms chains with relative ease. In addition, it can form a cyclical compound called 1,3,5-trioxane, which is essentially anhydrous formaldehyde; it doesn't contain water. This compound is readily turned back into formaldehyde in an acidic solution. Other forms of formaldehyde found in the lab include formalin, a water-formaldehyde solution of approximately 40 percent formaldehyde with small amounts of methanol to reduce polymerization.

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