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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Acrylamide, H2C=CHCONH2, is a known neurotoxin and possible carcinogen. It was a shock to all consumers of potato chips and french fries a few years ago when it was found to occur in those products.

  1. (a) Sketch the molecular structure of acrylamide and identify all bond angles.
  2. (b) Indicate which carbon-carbon bond is the stronger of the two.
  3. (c) Is the molecule polar or nonpolar?
  4. (d) The amount of acrylamide found in potato chips is 1.7 mg/kg. If a serving of potato chips is 28 g, how many moles of acrylamide are you consuming?

(a)

Interpretation Introduction

Interpretation:

The molecular structure of acrylamide and the bond angles has to be given.

Concept Introduction:

  • In VSEPR, the geometry of the molecule is explained based on minimizing electrostatic repulsion between the molecules’ valence electrons around a central atom
  • Bond angle is the angle between two bonds of a molecule and it is determined based on the electron-domain geometry.

[Bond angles: tetrahedral = 109.5o, trigonal planar = 120o, T-shape = 90o]

Electron geometry is the shape of a molecule predicted by considering both bond electron pairs and lone pair of electrons.

Molecular geometry is the shape of a molecule predicted by considering only bond pair of electrons.

Explanation

Given molecule is acrylamide.

Amide is a molecule having CONH2 group as the functional group.

The molecular structure of acrylamide is given below:

(b)

Interpretation Introduction

Interpretation:

The stronger carbon-carbon bond has to be determined.

Concept Introduction:

Bond order: It is the measure of number of electron pairs shared between two atoms.

Bondorder=12(NumberofelectronsinbondoingMOs-NumberofelectronsinantibondingMOs)

Bond length is inversely proportional to the bond order.

(c)

Interpretation Introduction

Interpretation:

The molecule is polar or non-polar has to be determined.

Concept Introduction:

Polar covalent bond involves an unequal sharing of electrons between two bonded atoms; it creates a partial separation of charge and a dipole moment.

Covalent bonds are polar, if there is a difference in electronegativity between the bonded atoms.

(d)

Interpretation Introduction

Interpretation:

The number of moles of acrylamide has to be identified.

Concept Introduction:

No.ofmoles=massmolarmass

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