Aluminium, Silicon, Phosphorous and Sulphur forms fluoride. The kind of solid that formed by fluoride has to be identified. Concept introduction: Types of solid Molecular solid Metallic solid Ionic solid Covalent network Molecular solid: A solid which consist of atoms or molecule thought intermolecular force. Metallic solid: The solid which consist of metal atom held together by metallic bonds. Metallic bonding is chemical bond formed by attraction between cation of metal and the surrounding sea of electrons. Ionic solid: A solid which consist of anions and cations held together by ionic bond (electrical attraction of opposite charges). Covalent network: A solid that involves atoms held together by great network or shackles by covalent bonds. Diamond and graphite are great example.
Aluminium, Silicon, Phosphorous and Sulphur forms fluoride. The kind of solid that formed by fluoride has to be identified. Concept introduction: Types of solid Molecular solid Metallic solid Ionic solid Covalent network Molecular solid: A solid which consist of atoms or molecule thought intermolecular force. Metallic solid: The solid which consist of metal atom held together by metallic bonds. Metallic bonding is chemical bond formed by attraction between cation of metal and the surrounding sea of electrons. Ionic solid: A solid which consist of anions and cations held together by ionic bond (electrical attraction of opposite charges). Covalent network: A solid that involves atoms held together by great network or shackles by covalent bonds. Diamond and graphite are great example.
Solution Summary: The author explains that Aluminium, Silicon, Phosphorous, and Sulphur forms fluoride. The kind of solid formed by it has to be identified.
Definition Definition Connection between particles in a compound. Chemical bonds are the forces that hold the particles of a compound together. The stability of a chemical compound greatly depends on the nature and strength of the chemical bonding present in it. As the strength of the chemical bonding increases the stability of the compound also increases.
Chapter 11, Problem 11.108QP
Interpretation Introduction
Interpretation:
Aluminium, Silicon, Phosphorous and Sulphur forms fluoride. The kind of solid that formed by fluoride has to be identified.
Concept introduction:
Types of solid
Molecular solid
Metallic solid
Ionic solid
Covalent network
Molecular solid:
A solid which consist of atoms or molecule thought intermolecular force.
Metallic solid:
The solid which consist of metal atom held together by metallic bonds. Metallic bonding is chemical bond formed by attraction between cation of metal and the surrounding sea of electrons.
Ionic solid:
A solid which consist of anions and cations held together by ionic bond (electrical attraction of opposite charges).
Covalent network:
A solid that involves atoms held together by great network or shackles by covalent bonds.
Liquid chromatography has been used to track the concentration of remdesivir
(a broad-spectrum antiviral drug, structure shown at right) in COVID patients
undergoing experimental treatments.
Intensity
The authors provide the following details regarding standard solutions
preparation:
HN
CN
HO
OH
NH2
Remdesivir (RDV) stock solution (5000 µg/mL) was prepared by
dissolving RDV drug powder using the mixture of DMSO: MeOH (30:70
v/v). The RDV working standard solutions for calibration and quality
controls were prepared using methanol in concentrations of 100, 10, 1,
0.1, 0.01 µg/mL. 1, 2.5, 5, 7.5, 10, 25, 50, 75, 100, 250, 500, 1000, and 5000 ng/mL sample solutions
were prepared freshly by spiking calibration standard solutions into the blank human plasma samples
for method calibration.
a) What type of calibration method is being described? Why do you think the authors chose this
method as opposed to another?
b) Based on the details provided in part a, describe an appropriate method blank…
Recent advancements in liquid chromatography include the development of ultrahigh pressure liquid
chromatography (UHPLC) and an increased use of capillary columns that had previously only been used
with gas chromatography. Both of these advances have made the development of portable LC systems
possible. For example, Axcend Corp. makes a portable system that uses a capillary column with an
internal diameter of 150-μm-that is packed with 1.7-um stationary phase particles. In contrast, a traditional
LC column has a 4.6 mm internal diameter and utilizes 5-um stationary phase particles.
a) Explain one advantage that is afforded by the use of a capillary column in liquid chromatographic
separation. Explain one disadvantage of capillary columns.
b) Explain how the use of smaller stationary phase particles can improve the resolution of a separation.
Include any relevant equations that support your explanation.
c) A scientist at Rowan University is using
the Axcend LC to conduct analyses of F…
This paper describes the use of fullerene molecules, also known as buckyballs, as a stationary phase for
liquid chromatography. The performance of the fullerene-modified stationary phase (FMS) is compared to
that of a more common C18 stationary phase and to two other carbon-based stationary phases, PGC and
COZ.
A.
10A
OM
B.
-
Figure 1. Idealized drawing of the
cross-section of a pore inside a silica
particle, showing the relative densities
of aminopropylsilyl (red/green) and
fullerene (blue) groups: (A) full cross-
section; (B) detailed view of covalent
bonding of fullerene to the silica
surface. Surface densities of silyl and
fullerene groups were inferred from
elemental composition results obtained
at each stage of the synthesis (see Table
1).
Absorbance (mAU, 220 nm)
700
600
500
400
300
200
100
a. Define selectivity, a, with words and an equation.
b. Explain how the choice of stationary phase affects selectivity.
c. Calculate the resolution of the nitrobenzene and toluene peaks in…
Chapter 11 Solutions
OWLv2 for Ebbing/Gammon's General Chemistry, 11th Edition, [Instant Access], 1 term (6 months)
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