(a) Interpretation: The term valence electrons should be defined. Concept introduction: Valence electrons are electrons which are most like to involve in a chemical reaction .
(a) Interpretation: The term valence electrons should be defined. Concept introduction: Valence electrons are electrons which are most like to involve in a chemical reaction .
Solution Summary: The author explains the meaning of valence electrons, which are located at outermost shell of an atom.
Formula Formula Bond dissociation energy (BDE) is the energy required to break a bond, making it an endothermic process. BDE is calculated for a particular bond and therefore consists of fragments such as radicals since it undergoes homolytic bond cleavage. For the homolysis of a X-Y molecule, the energy of bond dissociation is calculated as the difference in the total enthalpy of formation for the reactants and products. X-Y → X + Y BDE = Δ H f X + Δ H f Y – Δ H f X-Y where, ΔHf is the heat of formation.
Chapter 10, Problem 131SAE
Interpretation Introduction
(a)
Interpretation:
The term valence electrons should be defined.
Concept introduction:
Valence electrons are electrons which are most like to involve in a chemical reaction.
Interpretation Introduction
(b)
Interpretation:
The term electronegativity should be defined.
Concept introduction:
Electronegativity of an atom is affected by both its atomic number and the size of the atom.
Interpretation Introduction
(c)
Interpretation:
The term bond dissociation energy should be defined.
Concept introduction:
Bond dissociation energy is the measure of the strength of a chemical bond.
Interpretation Introduction
(d)
Interpretation:
The term double covalent bond should be defined.
Concept introduction:
Covalent bonding is the sharing of electrons between two atoms. There are three types of covalent bonds such as single, double and triple bonds.
Interpretation Introduction
(e)
Interpretation:
The term coordinate covalent bond should be defined.
Concept introduction:
A coordinate covalent bond is a kind of 2-center, 2-electrons covalent bond.
A small artisanal cheesemaker is testing the acidity of their milk
before it coagulates. During fermentation, bacteria produce lactic
acid (K₁ = 1.4 x 104), a weak acid that helps to curdle the milk and
develop flavor. The cheesemaker has measured that the developing
mixture contains lactic acid at an initial concentration of 0.025 M.
Your task is to calculate the pH of this mixture and determine whether
it meets the required acidity for proper cheese development. To
achieve the best flavor, texture and reduce/control microbial growth,
the pH range needs to be between pH 4.6 and 5.0.
Assumptions:
Lactic acid is a monoprotic acid
H
H
:0:0:
H-C-C
H
:0:
O-H
Figure 1: Lewis Structure for Lactic Acid
For simplicity, you can use the generic formula HA to represent the acid
You can assume lactic acid dissociation is in water as milk is mostly water.
Temperature is 25°C
1. Write the K, expression for the dissociation of lactic acid in the space provided. Do not forget to
include state symbols.…
Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product
structures, draw the curved electron-pushing arrows for the following reaction or mechanistic step(s).
Be sure to account for all bond-breaking and bond-making steps.
:0:
:0
H.
0:0
:0:
:6:
S:
:0:
Select to Edit Arrows
::0
Select to Edit Arrows
H
:0:
H
:CI:
Rotation
Select to Edit Arrows
H.
<
:0:
:0:
:0:
S:
3:48 PM Fri Apr 4
K
Problem 4 of 10
Submit
Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product
structures, draw the curved electron-pushing arrows for the following reaction or mechanistic step(s).
Be sure to account for all bond-breaking and bond-making steps.
Mg.
:0:
Select to Add Arrows
:0:
:Br:
Mg
:0:
:0:
Select to Add Arrows
Mg.
Br:
:0:
0:0-
Br
-190
H
0:0
Select to Add Arrows
Select to Add Arrows
neutralizing workup
H
CH3
Chapter 10 Solutions
General Chemistry: Principles and Modern Applications, Loose Leaf Version (11th Edition)
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