Search found 32 matches

by kevinav
Fri Dec 07, 2018 1:14 pm
Forum: Naming
Topic: Naming Fe coordination compounds
Replies: 4
Views: 84

Naming Fe coordination compounds

On one of the homework problems regarding naming a coordination compound with an Fe ion as the central transition metal, the answer contained the word "ferrous" for the name of the metal. Do you have to use "ferrous" instead of "iron"? Does the oxidation state of the ir...
by kevinav
Fri Dec 07, 2018 1:03 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxalate Structure
Replies: 1
Views: 45

Oxalate Structure

What is the structure of the polydentate oxalate?
by kevinav
Fri Dec 07, 2018 12:38 pm
Forum: Naming
Topic: Ligand Naming: -ido vs. -o
Replies: 2
Views: 52

Ligand Naming: -ido vs. -o

What is the correct way to write the name of a ligand when naming a coordination compound? For example, would the correct name be "cyano" or "cyanido"?
by kevinav
Fri Dec 07, 2018 12:36 pm
Forum: Naming
Topic: Polydentate Ligands
Replies: 2
Views: 62

Polydentate Ligands

Are we expected to know the names and structures of some polydentate ligands? If so, which ones?
by kevinav
Fri Dec 07, 2018 12:33 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Kw
Replies: 1
Views: 44

Kw

What is Kw? How do you find the Kw of an acid/base reaction?
by kevinav
Fri Dec 07, 2018 12:27 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Difference Between Ka and Kb
Replies: 2
Views: 130

Difference Between Ka and Kb

What is the difference between Ka and Kb? How would you find the Kb of an equation where an acid is ionized?
by kevinav
Tue Dec 04, 2018 6:57 pm
Forum: Lewis Acids & Bases
Topic: Problem 12.15 6th Edition
Replies: 2
Views: 57

Problem 12.15 6th Edition

This problem asks to draw the lewis structure for SO2 and Cl-, and the lewis structure of the product they would form. I drew the lewis structure of SO2 with S in the middle, with a double bond to each oxygen. O=S=O Because sulfur is in row 3, it can break the octet rule, and this lewis structure ha...
by kevinav
Tue Dec 04, 2018 5:51 pm
Forum: Amphoteric Compounds
Topic: Acidic, Basic, and Amphoteric Oxides
Replies: 2
Views: 60

Acidic, Basic, and Amphoteric Oxides

How can you know if an oxide will be acidic, basic, or amphoteric?
by kevinav
Sun Dec 02, 2018 11:57 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent vs angular?
Replies: 15
Views: 213

Re: Bent vs angular?

Bent and Angular are two names for the same shape
by kevinav
Sun Dec 02, 2018 11:56 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: AX3E
Replies: 18
Views: 273

AX3E

What would be the molecular shape for the general formula AX3E
by kevinav
Sun Dec 02, 2018 11:55 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Net Dipole
Replies: 1
Views: 126

Net Dipole

Would ClO3- have a net dipole even though oxygen and chlorine have similar electronegativities?
by kevinav
Tue Nov 27, 2018 6:04 pm
Forum: Hybridization
Topic: Ethene Hybrid Orbitals
Replies: 4
Views: 70

Ethene Hybrid Orbitals

In lecture, the example of ethene (C2H4) came up. Dr. Lavelle said each carbon uses 3 sp^2 orbitals and maintains one p orbital, with with it forms a pi bomb with the other carbon. How do you know when a central atom will maintain a nonhybrid orbital such as the carbons do in this molecule?
by kevinav
Sat Nov 17, 2018 11:24 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Seesaw Shape
Replies: 2
Views: 42

Seesaw Shape

In a seesaw-shaped molecule, there are 5 regions of electron density, one of them being a lone pair. The general formula is AX4E. If the lone pair is replacing on of the atoms on the axial plane of the trigonal bipyramidal shape, then the lone pair forms 90 degree angles with two of the atoms. Why d...
by kevinav
Sat Nov 17, 2018 11:18 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Square Pyramidal
Replies: 2
Views: 65

Square Pyramidal

What general formula would give a square pyramidal shape? Is this shape even possible through VSEPR?
by kevinav
Tue Nov 13, 2018 2:31 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Vapor Pressure
Replies: 2
Views: 139

Vapor Pressure

What is the relationship between vapor pressure and intermolecular interactions?
by kevinav
Wed Oct 31, 2018 4:31 pm
Forum: Photoelectric Effect
Topic: Test 2 Question 3c
Replies: 1
Views: 160

Test 2 Question 3c

Question 3, part c on test 2 asks the following: In an X-ray photoelectron experiment, chromium metal is irradiated with light of wavelength 9.020x10^(-11)m. c)Calculate the wavelength of the ejected electron. From part a we know that the work function is 2.18x10^(-15) J and we know from the graph t...
by kevinav
Tue Oct 30, 2018 11:33 pm
Forum: Lewis Structures
Topic: NH4+
Replies: 1
Views: 57

NH4+

To form an octet, N can form 3 bonds. In NH4, however, N forms 4 bonds. How is this possible? Also if there is an additional bond, wouldn't that mean there is an extra electron in the N? If so, how does NH4 have a positive charge?
by kevinav
Tue Oct 30, 2018 8:39 pm
Forum: Ionic & Covalent Bonds
Topic: 6th Edition, Problem 3.25
Replies: 1
Views: 45

6th Edition, Problem 3.25

The problem is the following: 3.25 On the basis of the expected charges on the monatomic ions, give the chemical formula of each of the following compounds: (a) magnesium arsenide; (b) indium(III) sulfide; (c) aluminum hydride; (d) hydrogen telluride; (e) bismuth(III) fluoride. What do the roman num...
by kevinav
Tue Oct 23, 2018 4:55 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configuration for Tungsten
Replies: 1
Views: 40

Electron Configuration for Tungsten

Question 2.43 on the sixth edition of the book asks for the electron configuration of tungsten (W). On the periodic table, tungsten comes after the lanthanoids and its atomic number is 74. How do I find the electron configuration for W?
by kevinav
Fri Oct 19, 2018 11:36 pm
Forum: Quantum Numbers and The H-Atom
Topic: 4th Quantum Number [ENDORSED]
Replies: 1
Views: 46

4th Quantum Number [ENDORSED]

Can somebody explain the concept behind the 4th quantum number? As in, what exactly are the terms magnetic spin, spin up, and spin down?
by kevinav
Fri Oct 19, 2018 11:34 pm
Forum: Quantum Numbers and The H-Atom
Topic: ml Quantum Number
Replies: 4
Views: 100

ml Quantum Number

If ml can be any value equivalent to l-l, l, or -l, how can the ml values for a d orbital be -2, -1, 0, 1, and 2?
by kevinav
Fri Oct 19, 2018 11:31 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: dz^2 Orbital
Replies: 1
Views: 69

dz^2 Orbital

How is the dz^2 orbital come about? Is it along a certain plane?
by kevinav
Fri Oct 12, 2018 11:12 am
Forum: Properties of Light
Topic: Kinetic Energy
Replies: 3
Views: 34

Re: Kinetic Energy

Correction: Ek= (1/2)mv^2
by kevinav
Fri Oct 12, 2018 11:10 am
Forum: Properties of Light
Topic: De Broglie Equation
Replies: 3
Views: 34

De Broglie Equation

Where does the De Broglie equation, λ= h/mv, come from? Is it related to the equation for kinetic energy?
by kevinav
Fri Oct 12, 2018 11:04 am
Forum: Properties of Light
Topic: Hz to S-1
Replies: 4
Views: 44

Re: Hz to S-1

Hertz are measured as 1 cycle per second, or 1 cycle x 1 second^-1. Think of Hz as being synonymous with "per second" and it will make it easier to understand how the units cancel. Therefore, when you have a problem where you are finding frequency, the unit that doesn't cancel will most li...
by kevinav
Fri Oct 12, 2018 11:00 am
Forum: Properties of Light
Topic: Kinetic Energy
Replies: 3
Views: 34

Kinetic Energy

Can kinetic energy, obtained from the equation Ek=mv^2, be used in the equation E=h(frequency)? Is kinetic energy the same as the energy used in this equation?
by kevinav
Tue Oct 09, 2018 2:46 pm
Forum: Limiting Reactant Calculations
Topic: 6th Edition, Problem M.11
Replies: 1
Views: 146

6th Edition, Problem M.11

I tried to do this problem and got part A right, but not part B. The problem is the following: M.11 A reaction vessel contains 5.77 g of white phosphorus and 5.77 g of oxygen. The first reaction to take place is the formation of phosphorus(III) oxide, P4O6: P4 (s) + 3 O2(g) --- P4O6 (s). If enough o...
by kevinav
Thu Oct 04, 2018 10:08 pm
Forum: Molarity, Solutions, Dilutions
Topic: 6th Edition, Problem G.21 Follow-Up
Replies: 1
Views: 52

Re: 6th Edition, Problem G.21 Follow-Up

Upon writing out my post and reviewing my work from this problem I answered my own question. I realize now that instead of using (1 K+ ion/2 atoms in KCl) and the factor to find the # of K ions in a sample, the proper factor of conversion would be (1 K+ ion/1 KCl molecule). If there are 6.71 x 10^-3...
by kevinav
Thu Oct 04, 2018 10:03 pm
Forum: Molarity, Solutions, Dilutions
Topic: 6th Edition, Problem G.21 Follow-Up
Replies: 1
Views: 52

6th Edition, Problem G.21 Follow-Up

The problem is as follows: G.21 A solution is prepared by dissolving 0.500 g of KCl, 0.500 g of K2S, and 0.500 g of K3PO4 in 500. mL of water. What is the concentration in the final solution of (a) potassium ions; (b) sulfide ions? I converted each quantity to moles, using the molar mass of each com...
by kevinav
Wed Oct 03, 2018 11:46 pm
Forum: Molarity, Solutions, Dilutions
Topic: 6th Edition, Problem G.21
Replies: 1
Views: 46

6th Edition, Problem G.21

Can anyone help me out with this question from the homework? I converted each quantity to moles of each compound, but I am unsure of how to find the moles of K in each compound. Would it be based on the ratio of atoms in each molecule (i.e. 1:1 ratio in KCl)? The problem is the following: G.21 A sol...
by kevinav
Tue Oct 02, 2018 2:55 pm
Forum: Significant Figures
Topic: Rules For Significant Figures
Replies: 6
Views: 152

Rules For Significant Figures

Can sombody explain the rules for what is considered a significant figure?

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