Search found 21 matches
- Thu Dec 07, 2017 1:19 pm
- Forum: Lewis Acids & Bases
- Topic: Bronsted vs. Lewis
- Replies: 6
- Views: 946
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: 579
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: 1360
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: 1065
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: 490
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: 710
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: 770
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: 943
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: 573
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: 968
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: 455
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: 349
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: 758
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: 368
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: 435
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: 703
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: 1204
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: 755
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: 612
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: 942
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: 3227
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?