Trifluoroacetic acid has the chemical formula CF 3 CO 2 H. It is a colorless liquid that has a density of 1.489 g/mL (a) Trifluoroacetic acid contains one CF 3 unit and is connected to the other C atom which bonds with both O’s. Draw the Lewis structure for trifluoroacetic acid.

Hello Everyone in this video we're trying to draw the lewiS structure for arsenic acid and we have to keep in mind the octet rule. So first things first, let's go ahead and count the valence electrons. So from hydrogen we have three items of hydrogen. Each hydrogen atom will contribute one fans electron. So three times one is equal to three. Now let's do the same thing for arsenic. So we have one item of arsenic. Each atom will contribute five valence electrons. So one times five is five. Now for oxygen we have three items of oxygen. Each will contribute six vans electrons. Three times six is 18. Now we take the sum of all these fans electrons to get a total of fans electrons in our arsenic um acid molecule. Alright, so oxygen prefers to have two bonds and arsenic prefers to have three bonds. So with that in mind we can have arsenic as our central atom connected to three oxygen atoms. And because hydrogen can only be a terminal item since it can only hold two electrons, it will be at the end of our oxygen's. And of course we need to fill in the lone pairs to give it its octet rule and one more long pair on an arsenic to fulfill its octet. So this right here is going to be our final lewis structure for our arsenic acid molecule. Thank you all so much for watching

Ch.8 - Basic Concepts of Chemical Bonding

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Brown 14th Edition

Ch.8 - Basic Concepts of Chemical Bonding

Problem 108a

Chapter 8, Problem 108a

Trifluoroacetic acid has the chemical formula CF₃CO₂H. It is a colorless liquid that has a density of 1.489 g/mL (a) Trifluoroacetic acid contains one CF₃ unit and is connected to the other C atom which bonds with both O’s. Draw the Lewis structure for trifluoroacetic acid.

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Identify the total number of valence electrons in trifluoroacetic acid (CF3CO2H). Carbon (C) has 4 valence electrons, fluorine (F) has 7, oxygen (O) has 6, and hydrogen (H) has 1. Calculate the total by adding the valence electrons from each atom: 2 C atoms, 3 F atoms, 2 O atoms, and 1 H atom.

Determine the central atoms in the structure. In trifluoroacetic acid, the CF3 group is attached to a central carbon atom, which is also bonded to another carbon atom. This second carbon is bonded to two oxygen atoms and one hydrogen atom.

Draw the skeletal structure of the molecule. Place the CF3 group on one side, connected to a central carbon atom. This central carbon is then connected to another carbon atom, which is bonded to two oxygen atoms and one hydrogen atom.

Distribute the valence electrons around the atoms to satisfy the octet rule. Start by placing electrons between atoms to form bonds, then distribute remaining electrons to complete the octets of the outer atoms (fluorine and oxygen) first, and then the central atoms.

Check the formal charges on each atom to ensure the most stable structure. Adjust the placement of electrons if necessary to minimize formal charges, ensuring that the overall charge of the molecule is zero.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Lewis Structures

Lewis structures are diagrams that represent the bonding between atoms in a molecule and the lone pairs of electrons that may exist. They help visualize the arrangement of electrons and the connectivity of atoms, allowing chemists to predict molecular geometry and reactivity. In the case of trifluoroacetic acid, drawing its Lewis structure involves placing the fluorine atoms and the carboxylic acid functional group correctly to reflect the molecule's actual bonding.

Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. In trifluoroacetic acid, the carboxylic acid group (-COOH) is a key functional group that influences its acidity and reactivity. Understanding functional groups is essential for predicting how a compound will behave in chemical reactions.

Molecular Geometry

Molecular geometry refers to the three-dimensional arrangement of atoms in a molecule. It is determined by the number of bonding pairs and lone pairs of electrons around the central atom, which affects the molecule's shape and properties. For trifluoroacetic acid, recognizing its geometry helps in understanding its polarity and interactions with other molecules.

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Textbook Question

Under special conditions, sulfur reacts with anhydrous liquid ammonia to form a binary compound of sulfur and nitrogen. The compound is found to consist of 69.6% S and 30.4% N. Measurements of its molecular mass yield a value of 184.3 g/mol. The compound occasionally detonates on being struck or when heated rapidly. The sulfur and nitrogen atoms of the molecule are joined in a ring. All the bonds in the ring are of the same length. (b) Write Lewis structures for the molecule, based on the information you are given. (Hint: You should find a relatively small number of dominant Lewis structures.)

Textbook Question

A common form of elemental phosphorus is the tetrahedral P₄ molecule, where all four phosphorus atoms are equivalent:

(b) How many P-P bonds are there in the molecule?

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Textbook Question

A common form of elemental phosphorus is the tetrahedral P₄ molecule, where all four phosphorus atoms are equivalent:

Draw a Lewis structure for a linear P₄ molecule that satisfies the octet rule. Does this molecule have resonance structures?

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Textbook Question

Trifluoroacetic acid has the chemical formula CF₃CO₂H. It is a colorless liquid that has a density of 1.489 g/mL. (b) Trifluoroacetic acid can react with NaOH in aqueous solution to produce the trifluoroacetate ion, CF₃COO₂. Write the balanced chemical equation for this reaction.

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Textbook Question

Trifluoroacetic acid has the chemical formula CF₃CO₂H. It is a colorless liquid that has a density of 1.489 g/mL. (d) How many milliliters of a 0.500 M solution of NaOH would it take to neutralize 10.5 mL of trifluoroacetic acid?

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Textbook Question

Ammonia reacts with boron trifluoride to form a stable compound, as we saw in Section 8.7. (a) Draw the Lewis structure of the ammonia–boron trifluoride reaction product.

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Trifluoroacetic acid has the chemical formula CF3CO2H. It is a colorless liquid that has a density of 1.489 g/mL (a) Trifluoroacetic acid contains one CF3 unit and is connected to the other C atom which bonds with both O’s. Draw the Lewis structure for trifluoroacetic acid.

Verified video answer for a similar problem:

Key Concepts

Lewis Structures

Functional Groups

Molecular Geometry

Trifluoroacetic acid has the chemical formula CF₃CO₂H. It is a colorless liquid that has a density of 1.489 g/mL (a) Trifluoroacetic acid contains one CF₃ unit and is connected to the other C atom which bonds with both O’s. Draw the Lewis structure for trifluoroacetic acid.