## Search found 21 matches

Thu Dec 07, 2017 1:19 pm
Forum: Lewis Acids & Bases
Topic: Bronsted vs. Lewis
Replies: 6
Views: 377

### Bronsted vs. Lewis

How are you supposed to tell if it's a Bronsted or Lewis acid or base? Are you supposed to just be able to tell from the reaction or by looking at the equation? Or is it given? Or is there another way to tell?
Thu Dec 07, 2017 12:58 pm
Forum: Bronsted Acids & Bases
Topic: Bronsted vs. Lewis
Replies: 4
Views: 339

### Bronsted vs. Lewis

Just wanted to clarify, Bronsted acids and bases have to do with proton donation/acception while Lewis acids and bases have to do with electrons? And when determining if it is strong or weak, is it the same for both types?
Sun Dec 03, 2017 5:04 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Problem 11.81
Replies: 3
Views: 415

### Re: Problem 11.81

Since the equilibrium constant at 600.K (1.7 x 10^-3) is greater than the equilibrium constant at 700.K (7.8 x 10^-5), less ammonia will be formed with the higher temperature. Therefore raising the temperature will favor the formation of reactants. Hopefully this clarifies it!
Sun Dec 03, 2017 4:45 pm
Forum: Dipole Moments
Topic: Dipole Moments and Polarity
Replies: 9
Views: 537

### Dipole Moments and Polarity

Can someone please clarify how to find/determine the dipole of a molecule and how you can find polarity with that?
Thu Nov 23, 2017 10:11 am
Forum: Naming
Topic: Naming the metal
Replies: 4
Views: 284

### Re: Naming the metal

Not sure if this helps, but I believe -ate is used for anion transition metals only!
Wed Nov 22, 2017 1:11 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: How would you know which reactants/products create certain compounds (ex J.7)?
Replies: 2
Views: 495

### Re: How would you know which reactants/products create certain compounds (ex J.7)?

Can someone please explain where the H2O came from in the example above? Or is it just always a product in these types of reactions?
Thu Nov 16, 2017 10:46 am
Forum: Hybridization
Topic: Order of s,p,d in Names of Hybrid Orbitals
Replies: 3
Views: 290

### Re: Order of s,p,d in Names of Hybrid Orbitals

In my discussion today, we talked about this issue, and my TA said that it shouldn't matter what order you put it in, whether the d be in the front or end. The reason the order is so important in electron configuration is to help with the charged atoms. But for hybrid orbitals, it shouldn't matter!
Thu Nov 16, 2017 10:43 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angle
Replies: 7
Views: 425

### Re: Bond Angle

The bond angle depends on the repulsion which takes bonds and lone pairs into consideration. So, I guess you can memorize the angle depending on the shape, but there are many possibilities. For me, I base it on my drawing of the molecule.
Thu Nov 09, 2017 7:07 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: delta v
Replies: 4
Views: 374

### Re: delta v

Yes! Multiply the indeterminacy by two because this gives the range for the velocity.
Thu Nov 09, 2017 7:02 am
Forum: Trends in The Periodic Table
Topic: Electron Affinity - P, Na, Ar
Replies: 4
Views: 338

### Re: Electron Affinity - P, Na, Ar

Yes! Just remember that noble gases are an exception when it comes to electron affinity!
Thu Nov 02, 2017 12:12 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Exceptions to the Configuration Rules
Replies: 3
Views: 262

### Re: Exceptions to the Configuration Rules

Just to make sure, there are no other exceptions to the rules that we need to know right? It's just copper and chromium?
Wed Nov 01, 2017 11:52 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Sample Problem (Example 1.7// Textbook)
Replies: 2
Views: 219

### Re: Sample Problem (Example 1.7// Textbook)

Yes! Even though you weren't specifically given a velocity, you can find the delta v by multiplying the uncertainty in velocity by two to account for adding and subtracting 1.00x10^-3 m/s.
Tue Oct 24, 2017 7:54 am
Forum: Ionic & Covalent Bonds
Topic: Ionization Energy [ENDORSED]
Replies: 5
Views: 389

### Ionization Energy[ENDORSED]

To clarify, ionization energy is the energy needed to remove an electron from an atom? Is this a consistent number for each atom? Or does it depend on the situation? Or basically, is it known? Or does it need to be solved for?
Tue Oct 24, 2017 7:17 am
Forum: Trends in The Periodic Table
Topic: 2.75
Replies: 2
Views: 226

### Re: 2.75

This doesn't mean reactive to a certain element or anything, but it means that the s-block metals are more unstable than the p-block ones. And the answer from the solutions manual states "the ionization energies of the s-block metals are considerably lower, thus making it easier for them to los...
Thu Oct 19, 2017 10:30 pm
Forum: *Shrodinger Equation
Topic: The "H" Term in the Schrodinger Equation
Replies: 2
Views: 322

### Re: The "H" Term in the Schrodinger Equation

I believe it refers to the double derivative of sin or cos wave functions. Because when you take the derivative of sin or cos twice, you return back to sin or cos (despite the negatives). Hopefully that makes some sense!
Thu Oct 19, 2017 10:24 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: 2.19 Part B
Replies: 5
Views: 407

### Re: 2.19 Part B

Justin Chu 1C wrote:That is correct. For the d-orbital, you can have 5 different numbers for your magnetic quantum number, specifically -2, -1, 0, 1, 2.

Can someone please explain how you get the magnetic quantum numbers of -2, -1, 0, 1, 2?
Sat Oct 14, 2017 12:08 am
Forum: Properties of Electrons
Topic: Constructive vs. Destructive Interference [ENDORSED]
Replies: 4
Views: 687

### Constructive vs. Destructive Interference[ENDORSED]

Can someone please explain the difference between the two? And what exactly is diffraction? I'm sorry, I'm really confused.
Fri Oct 13, 2017 11:59 pm
Forum: Photoelectric Effect
Topic: Photon vs. Energy [ENDORSED]
Replies: 6
Views: 423

### Photon vs. Energy[ENDORSED]

Is "photon" and "energy" interchangeable? When question talks about a photon, does that mean the energy?
Thu Oct 05, 2017 1:45 pm
Forum: Empirical & Molecular Formulas
Topic: Mass Percent Composition
Replies: 4
Views: 339

### Mass Percent Composition

When finding empirical formulas, do you always have to find the mass percent composition? How do you know when you need to find it? For example, in problem F.13 I didn't need to find it.
Wed Oct 04, 2017 10:46 pm
Forum: Balancing Chemical Reactions
Topic: H1 // Book Problem [ENDORSED]
Replies: 7
Views: 532

### Re: H1 // Book Problem[ENDORSED]

Yes, you cannot just simply add an element to the chemical equation if it isn't produced. To balance an equation, you need to add stoichiometric coefficients, not add elements to the reaction.
Wed Oct 04, 2017 10:21 pm
Forum: SI Units, Unit Conversions
Topic: Sig Figs
Replies: 12
Views: 1215

### Re: Sig Figs

I get confused with sig figs when there are zeros. For example, if the number is 0.020, is there 2 or 3 sig figs?