Search found 49 matches

by Sofia Q
Sun Dec 01, 2019 9:37 pm
Forum: Bronsted Acids & Bases
Topic: Final
Replies: 13
Views: 166

Final

Can someone list all the topics we should be extremely familiarized with for our final?
by Sofia Q
Sun Dec 01, 2019 9:31 pm
Forum: Lewis Acids & Bases
Topic: Lewis Structures
Replies: 1
Views: 26

Lewis Structures

How can a lewis structure help us identify bases and acids?
by Sofia Q
Sun Dec 01, 2019 9:30 pm
Forum: Lewis Acids & Bases
Topic: Final
Replies: 4
Views: 47

Final

Although our final is accumulative, is it good to assume it will showcase more heavily the subjects we have recently been looking at?
by Sofia Q
Sun Dec 01, 2019 9:29 pm
Forum: Lewis Acids & Bases
Topic: Oxoacids
Replies: 3
Views: 32

Oxoacids

What is a an oxoacid?
by Sofia Q
Sun Dec 01, 2019 9:28 pm
Forum: Lewis Acids & Bases
Topic: Acids
Replies: 1
Views: 29

Acids

How does the resulting anion being stable relate to the strength of the acid?
by Sofia Q
Sun Dec 01, 2019 9:26 pm
Forum: Lewis Acids & Bases
Topic: Strong Acids
Replies: 5
Views: 47

Strong Acids

What is the relationship between bond of A---H regarding the strength of the acid?
by Sofia Q
Fri Nov 22, 2019 2:17 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Homework
Replies: 1
Views: 22

Homework

From what section must we complete homework problems for?
by Sofia Q
Fri Nov 22, 2019 2:17 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Acids
Replies: 6
Views: 49

Acids

What makes an acid either strong or weak?
by Sofia Q
Fri Nov 22, 2019 2:16 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Naming
Replies: 1
Views: 37

Naming

What are the rules for naming the coordination compounds?
by Sofia Q
Fri Nov 22, 2019 2:15 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Sphere
Replies: 6
Views: 48

Coordination Sphere

What constitutes a coordination sphere?
by Sofia Q
Fri Nov 22, 2019 2:14 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Definition of a Ligand
Replies: 4
Views: 39

Definition of a Ligand

Could someone explain what an ligand is?
by Sofia Q
Sat Nov 16, 2019 9:04 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Symmetry and Polarity
Replies: 13
Views: 123

Re: Symmetry and Polarity

Lewis structures should be mainly used to determine the shape in VSPER, and from that shape you can determine polarity more accurately.
by Sofia Q
Sat Nov 16, 2019 9:00 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Melting Points
Replies: 7
Views: 64

Re: Melting Points

You would just be asked to predict the melting point, nothing exact but more on the lines of high and low, or perhaps comparing two molecules and predicting which one would have a higher or lower melting point due to the bonds they have.
by Sofia Q
Sat Nov 16, 2019 8:58 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test #2
Replies: 4
Views: 50

Re: Test #2

He said during lecture on Friday that he would be going over sigma and pi bonds on Monday. :)
by Sofia Q
Sat Nov 16, 2019 8:57 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 8
Views: 78

Re: Bond Angles

Bond angle measurements have to be done experimentally but certain angles you can tell right away by seeing the lewis structure, such as those of a linear molecule or trigonal planar.
by Sofia Q
Sat Nov 16, 2019 8:55 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: What is VSPER
Replies: 14
Views: 235

Re: What is VSPER

VSPER is the acronym for Valence Shell Electron Pair Repulsion, a model that explains the experimentally observed shape of a molecule.
by Sofia Q
Mon Nov 11, 2019 7:26 pm
Forum: Ionic & Covalent Bonds
Topic: Homework for week 7
Replies: 5
Views: 84

Homework for week 7

Are we still doing homework for chemical bonds ?
by Sofia Q
Mon Nov 11, 2019 7:25 pm
Forum: DeBroglie Equation
Topic: Velocity
Replies: 13
Views: 349

Re: Velocity

It would be considered unreasonable.
by Sofia Q
Mon Nov 11, 2019 7:24 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal charge
Replies: 16
Views: 159

Re: Formal charge

If all of them can't be 0, then you want them to be the smallest they can be, agreeing with any charge the compound hay have. A tip would be to keep the central 0 is possible, however.
by Sofia Q
Mon Nov 11, 2019 7:22 pm
Forum: Electronegativity
Topic: Formula for Difference
Replies: 7
Views: 168

Re: Formula for Difference

At most you will be given the differences and you will have to subtract those, but I doubt we personally have to find the electronegativity.
by Sofia Q
Mon Nov 11, 2019 7:21 pm
Forum: Trends in The Periodic Table
Topic: Ionization energy
Replies: 6
Views: 162

Re: Ionization energy

by looking at the periodic table one would assume nitrogen to be less electronegative than oxygen following the trend on the periodic table, but that in fact due to the symmetry that the nitrogen atom has in the 2p subshell(compared to that of oxygen), more clearly seen in a arrow diagram, gives it ...
by Sofia Q
Sat Nov 02, 2019 4:50 pm
Forum: Quantum Numbers and The H-Atom
Topic: Equations we need for midterm
Replies: 7
Views: 233

Equations we need for midterm

Hi guys, as I do homework problems in preparation for the midterm I can't help to notice that some of them require equations that we did not practice with, or in some cases, not mention at all... Will we be expected to use them still? Or should we mainly focus on the application of equations that Dr...
by Sofia Q
Sat Nov 02, 2019 4:27 pm
Forum: Ionic & Covalent Bonds
Topic: Electronegativity difference >1.5 but <2
Replies: 3
Views: 34

Re: Electronegativity difference >1.5 but <2

There is an a cut out rule that says what compounds in between these ranges are, experimenting with the compound would be needed. A type of test we talked about in class is solubility in water. Salts, another term for ionic compounds, will completely dissolve in water, but as the covalent character ...
by Sofia Q
Sat Nov 02, 2019 4:20 pm
Forum: Lewis Structures
Topic: BF3
Replies: 3
Views: 44

Re: BF3

Additionally, the lack of the octet will make BF3 highly reactive, turning to BF4^- as a fluorine atom is attracted.
by Sofia Q
Sat Nov 02, 2019 4:14 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Cu and Cr
Replies: 11
Views: 97

Re: Cu and Cr

It was mentioned during one of the chemistry reviews that these configuration exceptions are favorable due to the symmetry that is created within them.
by Sofia Q
Sat Nov 02, 2019 4:03 pm
Forum: Ionic & Covalent Bonds
Topic: covalent character of ionic bonds
Replies: 4
Views: 47

Re: covalent character of ionic bonds

A larger anion will create a larger distorted electron cloud that in turn allows for more covalent character.
by Sofia Q
Sat Nov 02, 2019 3:58 pm
Forum: Electronegativity
Topic: Oxygen and Electronegativity
Replies: 5
Views: 51

Re: Oxygen and Electronegativity

Hi! I thought that maybe it can be helpful to see it visually. Considering that valence electrons are those found within the s and p subshells added together. A noble gas such as neon ([He] 2s2 2p6) has both their s and p orbitals filled, meaning 2 + 6= 8. This makes it stable and have a low electro...
by Sofia Q
Sun Oct 27, 2019 1:52 pm
Forum: Octet Exceptions
Topic: 8 valence electrons
Replies: 3
Views: 42

8 valence electrons

In class we said how elements P, S, and Cl can have exceptions to the octet rule, but I was wondering if any other elements could too, or should I just keep these three in mind?
by Sofia Q
Sun Oct 27, 2019 1:47 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Central atom
Replies: 8
Views: 137

Central atom

When setting up Lewis structures, should we always ensure that the formal charge of our central atom is 0? Are there any exceptions?
by Sofia Q
Sun Oct 27, 2019 1:43 pm
Forum: Lewis Structures
Topic: Bond lengths
Replies: 3
Views: 36

Bond lengths

Would it be expected of us to know or know how to calculate observed bond lengths?
by Sofia Q
Sun Oct 27, 2019 1:39 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent bonds
Replies: 5
Views: 75

Covalent bonds

A compound can only called covalent if it does not contain any metals? Or can someone provide an example of a covalent compound that contains a metal?
by Sofia Q
Sun Oct 27, 2019 1:36 pm
Forum: Lewis Structures
Topic: Bond Lengths
Replies: 2
Views: 37

Bond Lengths

Friday in class we talked about how the bond lengths were different in Benzene depending on whether there was a single or double bond between two carbons, do these lengths apply only to bonds or carbon, or are they universally what double or single bond lengths are for any atoms of any element?
by Sofia Q
Sun Oct 27, 2019 1:31 pm
Forum: Lewis Structures
Topic: Homework for week 5
Replies: 1
Views: 19

Homework for week 5

Just to be sure, this week we do start doing homework purely from the problems annotated in "Chemical Bonds" correct?
by Sofia Q
Sat Oct 19, 2019 1:17 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Inner e- and Outer e-
Replies: 14
Views: 129

Inner e- and Outer e-

What results from the position of inner and outer e-?
by Sofia Q
Sat Oct 19, 2019 1:13 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Hund's rule
Replies: 5
Views: 53

Hund's rule

Why do the e- in the same subshell occupy different orbitals with parallel spin?
by Sofia Q
Sat Oct 19, 2019 1:11 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Quantum Numbers
Replies: 3
Views: 55

Quantum Numbers

Hi,
Could someone explain to me how many subshells there would be if n=4?
by Sofia Q
Sat Oct 19, 2019 1:09 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Midterm
Replies: 3
Views: 37

Midterm

Should we focus entirely on quantum world for our upcoming midterm?
by Sofia Q
Sat Oct 19, 2019 1:04 pm
Forum: General Science Questions
Topic: Homework for week 4
Replies: 1
Views: 37

Homework for week 4

Hi guys, I was wondering if we should continue doing homework from the problems listed under Quantum World, or if there are other sections we should start working on?
by Sofia Q
Sat Oct 12, 2019 7:41 pm
Forum: Properties of Electrons
Topic: Wavelength and Electrons
Replies: 4
Views: 71

Wavelength and Electrons

What is the wavelength of an electron?
by Sofia Q
Sat Oct 12, 2019 7:38 pm
Forum: Properties of Electrons
Topic: History of the QM Equations
Replies: 2
Views: 28

History of the QM Equations

During what years where the QM equations developed?
by Sofia Q
Sat Oct 12, 2019 7:37 pm
Forum: Properties of Electrons
Topic: Diffraction
Replies: 2
Views: 31

Diffraction

What happens during constructive interference?
by Sofia Q
Sat Oct 12, 2019 7:34 pm
Forum: Properties of Electrons
Topic: Planck's constant
Replies: 2
Views: 51

Planck's constant

I read somewhere we can derive Planck's constant from plotted data that demonstrated the directly proportional relationship of energy and frequency, is it true?
by Sofia Q
Sat Oct 12, 2019 7:31 pm
Forum: Properties of Electrons
Topic: Weight of Particles
Replies: 4
Views: 41

Weight of Particles

Can someone please tell me the masses of an electron, proton, and neutron?
by Sofia Q
Thu Oct 03, 2019 6:02 pm
Forum: Molarity, Solutions, Dilutions
Topic: Fundamentals G5
Replies: 3
Views: 80

Fundamentals G5

I was attempting to do problem G5 and I got a bit confused when it came to transferring volumes of solution to obtain a certain number of mmols, could someone explain?
by Sofia Q
Wed Oct 02, 2019 9:45 pm
Forum: SI Units, Unit Conversions
Topic: Homework 2
Replies: 7
Views: 96

Re: Homework 2

I'm not quite sure but it would make more sense to pick 5 problems from the new Quantum section.
by Sofia Q
Wed Oct 02, 2019 9:43 pm
Forum: Balancing Chemical Reactions
Topic: Stoichiometric Coefficients [ENDORSED]
Replies: 8
Views: 187

Re: Stoichiometric Coefficients [ENDORSED]

Technically while the stoichiometric coefficients follow the same ratio, whatever number they are multiplied by will remain a correct answer, but generally this would not be helpful, and the smallest ratio is preferred. Try to simplify it down as much as you can while remaining with whole numbers.
by Sofia Q
Wed Oct 02, 2019 9:21 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Chemical Reaction
Replies: 6
Views: 84

Re: Balancing Chemical Reaction

Remember the law of conservation of mass while balancing the equation, your number of atoms should be present in the reactants side of the equation should match those in the product side. If yours match like that then you know that you balanced it with the correct coefficients.
by Sofia Q
Wed Oct 02, 2019 7:06 pm
Forum: Significant Figures
Topic: Powers of 10
Replies: 10
Views: 137

Re: Powers of 10

Calculations should be done in the power of 10 to avoid any misunderstandings. For example, if in a problem regarding molarity, the formula calls for the number of moles over liters, however, if you were to be given mL and not convert it before inserting, without future modification your calculated ...
by Sofia Q
Wed Oct 02, 2019 7:00 pm
Forum: Empirical & Molecular Formulas
Topic: H25 Fundamental Question
Replies: 3
Views: 87

Re: H25 Fundamental Question

Hi! Phosphorus trioxide and phosphorus apart from pentoxide having different chemical formulas, respectively P4O6 and P4O10, the roman numerals refer to the different oxidation states that each phosphorus has in their respective molecule.

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