Search found 20 matches

by Iris Shim 1E
Sun Dec 10, 2017 1:10 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Delocalized Electrons
Replies: 3
Views: 427

Delocalized Electrons

How is delocalization affected by resonance?
by Iris Shim 1E
Tue Dec 05, 2017 11:52 pm
Forum: Bronsted Acids & Bases
Topic: Bronsted Acids and Bases versus Lewis Acids and Bases
Replies: 3
Views: 365

Bronsted Acids and Bases versus Lewis Acids and Bases

I don't understand why there are two names for acids and bases. Are there instances where a Bronsted acid is not a Lewis acid or a Bronsted base is not a Lewis base or vice versa? What is the difference between the two definitions?
by Iris Shim 1E
Sun Dec 03, 2017 10:44 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Weak Acids and Bases
Replies: 2
Views: 207

Weak Acids and Bases

What does it mean for an acid or base to disassociate completely? How does that affect the reaction and its equilibrium?
by Iris Shim 1E
Mon Nov 27, 2017 3:02 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Question 4.13 Part C
Replies: 1
Views: 162

Question 4.13 Part C

The answer for the Lewis structure for this question says that there are more resonance structures available, but what would be the best resonance structure? And do different resonance structures affect the structure of the molecule?
by Iris Shim 1E
Mon Nov 27, 2017 2:57 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Double and Triple Bonds
Replies: 1
Views: 188

Double and Triple Bonds

Do double or triple bonds affect the structure of a molecule? For example, on question 4.11 part b, there's a double bond between the O and the P, but would it push the other atoms further away affecting the angles in between the atoms, thus the structure?
by Iris Shim 1E
Sun Nov 26, 2017 10:17 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs [ENDORSED]
Replies: 3
Views: 245

Lone Pairs [ENDORSED]

If there are lone pairs on an atom that's NOT the central atom, does it affect the angles of the bonding in the VSEPR model?
by Iris Shim 1E
Sun Nov 26, 2017 9:55 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Question 4.1 Part B
Replies: 1
Views: 126

Question 4.1 Part B

For question 4.1 part b, how come the second model may have lone pairs on the central atom? If there was a lone pairs on the central atom, wouldn't the bonding pairs move away from the lone pair making the angle less than 180 degrees?
by Iris Shim 1E
Mon Nov 20, 2017 11:51 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K=1 [ENDORSED]
Replies: 2
Views: 174

K=1 [ENDORSED]

Even though it is rare, what does it mean when K=1? Qualitatively, how would this affect the reaction in the hypothetical scenario that k=1
by Iris Shim 1E
Mon Nov 20, 2017 11:39 am
Forum: Lewis Structures
Topic: Question 4.5
Replies: 2
Views: 187

Re: Question 4.5

When you're drawing the Lewis structure, you have to get minimize the formal charge overall and on each ion. The less formal charge, the more stable it is. The correct answer shown in the book minimizes the overall formal charge.
by Iris Shim 1E
Sun Nov 12, 2017 1:58 am
Forum: Resonance Structures
Topic: Understanding Resonance Structures
Replies: 6
Views: 504

Understanding Resonance Structures

When the Lewis structures of molecules have multiple Resonance Structures, what does that mean for the molecule? Does that mean a more stable (has less formal charge) resonance structure occurs more frequently for the molecule in nature than a resonance structure with more formal charge?
by Iris Shim 1E
Sun Nov 12, 2017 1:53 am
Forum: Dipole Moments
Topic: Dipole Moments
Replies: 2
Views: 207

Dipole Moments

Can someone explain in a concise manner what dipole moments actually do to a molecule? Do they help the molecule bond to other molecules?
by Iris Shim 1E
Sun Nov 05, 2017 8:22 pm
Forum: Lewis Structures
Topic: Problem 3.59 Part A
Replies: 4
Views: 270

Re: Problem 3.59 Part A

But how is this molecule able to exist in the first place?
by Iris Shim 1E
Sun Nov 05, 2017 6:40 pm
Forum: Lewis Structures
Topic: Problem 3.59 Part A
Replies: 4
Views: 270

Problem 3.59 Part A

How come in the Lewis structure of ClO, why does chlorine only have 7 electrons? How come the octet rule does not have to be fulfilled with ClO?
by Iris Shim 1E
Sun Nov 05, 2017 5:36 pm
Forum: Resonance Structures
Topic: Homework Problem 3.41Part C
Replies: 1
Views: 225

Homework Problem 3.41Part C

I don't understand how to be able to interpret how to set up the structure for glycine, more specifically the COOH. How do you determine which atom the oxygen atoms for the COOH attach to and where the Hydrogen attaches?
by Iris Shim 1E
Sun Oct 29, 2017 7:32 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Atomic and Molecular Orbitals [ENDORSED]
Replies: 1
Views: 186

Atomic and Molecular Orbitals [ENDORSED]

Do atomic orbitals always form molecular orbitals when they overlap in bonding?
by Iris Shim 1E
Sun Oct 29, 2017 7:25 pm
Forum: Conjugate Acids & Bases
Topic: Acids and Bases [ENDORSED]
Replies: 8
Views: 695

Acids and Bases [ENDORSED]

Why do strong conjugate bases mean a weak acid?
by Iris Shim 1E
Sun Oct 22, 2017 8:28 pm
Forum: Photoelectric Effect
Topic: Work Function [ENDORSED]
Replies: 5
Views: 359

Work Function [ENDORSED]

Does the energy of a photon have to be greater than the work function in order to remove the electron? If the energy of the photon is exactly equal to the work function, would the electron still jump an energy level?
by Iris Shim 1E
Sun Oct 22, 2017 8:24 pm
Forum: Properties of Light
Topic: Heisenberg's indeterminacy principle
Replies: 2
Views: 230

Heisenberg's indeterminacy principle

What does ħ mean in the equation of the Heisenberg's indeterminacy principle? What is the value (and units) of ħ and where does it come from?
by Iris Shim 1E
Sun Oct 15, 2017 5:14 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Question 1.17
Replies: 1
Views: 160

Re: Question 1.17

You use the Rydberg Equation (page 7) except you have to multiply the Rydberg equation by Z^2 since the question states that the energy levels differ by a factor of Z^2 from those of hydrogen and the Rydberg equation is used for hydrogen. You use the modified equation to solve for frequency. Then, y...
by Iris Shim 1E
Sun Oct 15, 2017 12:36 am
Forum: Properties of Light
Topic: Understanding the Rydberg Formula [ENDORSED]
Replies: 6
Views: 531

Re: Understanding the Rydberg Formula [ENDORSED]

The negative sign means the electron's energy has decreased, and the energy is released as electromagnetic radiation.

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