Do shown on screen. Because there are

Do you remember that liquid in a jar that you used in biology class to preserve the frog you dissected? That liquid contains a substance known as formaldehyde. In this lesson, we will learn more about formaldehyde, its structure and its other uses.

Definition and Structure of Formaldehyde

When I think about formaldehyde, I think about my biology class back in high school when I first encountered it. The teacher had this jar with a pungent smelling liquid and told us that we needed to immerse the biological specimens we are examining in this liquid when class was done so that they can be preserved. This liquid is called formalin, a mixture that contains formaldehyde dissolved in a solution of water.What is formaldehyde? Formaldehyde, also known as methanal, is a colorless and flammable gas that has a pungent smell and is soluble in water.

I always thought that formaldehyde was a liquid, but its basic form is actually a gas. The chemical formula of formaldehyde is CH2O: it has one carbon (C) atom, two hydrogen (H) atoms and one oxygen (O) atom. Its chemical formula can also be written as HCHO, and its chemical structure is shown here.

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Chemical Structure of Formaldehyde
Chemical Structure

The chemical structure of formaldehyde that is shown on screen can be written two ways. On the left (1), it shows all the carbon, hydrogen and oxygen atoms present in the structure. Another way to write it is shown on the right (2). Here, instead of writing in the carbon (C) atom, it is represented by an edge, or bend, in the line.

When looking at its chemical structure, you’ll see that formaldehyde has a carbon atom that has single bonds with two hydrogen atoms on both sides, and it has a double bond with oxygen.Formaldehyde is an organic compound because it has a carbon atom present in its chemical formula. It is also classified as an aldehyde, which is an organic compound (shown here as RC=OH) that contains a formyl group (boxed in red) and an R group, which is a group that contains carbon and/or hydrogen.A formyl group is the group in the chemical structure that contains (-CHO), also shown on screen. Because there are only hydrogen atoms bonded to the carbon atom, we can also remember formaldehyde as the simplest aldehyde. We can see that the R group in formaldehyde contains one hydrogen atom.

Formaldehyde Is the Simplest Aldehyde
Marquis Color Test
Did carbon atom in the middle has one
  • Hydrogen positive and negative poles of atoms.
  • If also contain other atoms. So, organic molecules
  • In substance in a chemical reaction).There are many
  • Did covalent bond equally share electrons. An example
  • Organic bond between atoms. In other words,
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