Search found 21 matches
- Sun Dec 10, 2017 12:16 am
- Forum: Amphoteric Compounds
- Topic: Determining Amphoteric Compounds
- Replies: 3
- Views: 739
Re: Determining Amphoteric Compounds
amphoteric is when it can react with acids and bases right?
- Wed Dec 06, 2017 5:37 pm
- Forum: Conjugate Acids & Bases
- Topic: HW 12.45
- Replies: 4
- Views: 1218
HW 12.45
Arrange the following bases in order of increasing strength on the basis of the pKa values of their conjugate acids, which are given in parentheses: (a) ammonia (9.26); (b) methylamine (10.56); (c) ethylamine (10.81); (d) aniline (4.63) (see Exercise 12.44). Is there a simple pattern of strengths? I...
- Fri Dec 01, 2017 11:25 am
- Forum: Hybridization
- Topic: Do pi bonds only form with double/triple bonds?
- Replies: 5
- Views: 732
Re: Do pi bonds only form with double/triple bonds?
single bond = sigma bond
double bond = sigma + pi bonds
triple bond = sigma + 2pi bonds
so yes essentially pi bonds from double and triple bonds
double bond = sigma + pi bonds
triple bond = sigma + 2pi bonds
so yes essentially pi bonds from double and triple bonds
- Fri Dec 01, 2017 11:24 am
- Forum: Hybridization
- Topic: Hybridization and lone pairs
- Replies: 3
- Views: 539
Re: Hybridization and lone pairs
Yes, because lone pairs would simply be another area of electron density.
- Fri Dec 01, 2017 11:23 am
- Forum: Hybridization
- Topic: Delocalized π bonds
- Replies: 2
- Views: 528
Re: Delocalized π bonds
it helps explains resonance
- Wed Nov 29, 2017 8:58 am
- Forum: Ideal Gases
- Topic: Kc to Kp Conversion
- Replies: 5
- Views: 938
Re: Kc to Kp Conversion
also concentration is n/v in the PV = nRT equation. That's why we are able to get a correlation between them.
- Wed Nov 29, 2017 8:57 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Le Chatelier's Principle
- Replies: 4
- Views: 1164
Le Chatelier's Principle
Can someone explain how taking away heat affects the equilibrium reaction?
- Fri Nov 17, 2017 1:24 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3592126
Re: Post All Chemistry Jokes Here
Na: That was sodium funny
Ne: I slapped my neon that one
Ne: I slapped my neon that one
- Fri Nov 17, 2017 1:24 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3592126
Re: Post All Chemistry Jokes Here
What kind of dogs do chemists have?
laboratory dogs ;)
laboratory dogs ;)
- Sat Nov 11, 2017 5:23 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Uncertainty Principle [ENDORSED]
- Replies: 5
- Views: 684
Re: Uncertainty Principle [ENDORSED]
If it's +/- 4. its easier to write it out like this
(4+4)-(4-4)
(4+4)-(4-4)
- Sat Nov 11, 2017 5:21 pm
- Forum: Octet Exceptions
- Topic: Expanding an Octet [ENDORSED]
- Replies: 2
- Views: 467
Re: Expanding an Octet [ENDORSED]
It's not necessarily a rule but just as a guide that the more electronegative one will more likely hold the negative charge.
- Sun Nov 05, 2017 10:50 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Hund's Rule [ENDORSED]
- Replies: 6
- Views: 1206
Re: Hund's Rule [ENDORSED]
Spins basically just shows which direction the electron is going in. Counter clockwise or clockwise.
- Sun Nov 05, 2017 10:48 am
- Forum: Lewis Structures
- Topic: 3.57
- Replies: 2
- Views: 418
Re: 3.57
We are supposed to look at the name and get an idea of the structure. Like we know that Hydrogen is most probably going to be on the outside and we can tell by the valence electrons what is going to be the central atom.
- Mon Oct 30, 2017 4:51 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Confused on Problem 1.57 (regarding the Balmer Series)
- Replies: 9
- Views: 3947
Re: Confused on Problem 1.57 (regarding the Balmer Series)
Can you explain how to solve this problem in general?
- Sat Oct 28, 2017 12:46 pm
- Forum: DeBroglie Equation
- Topic: When to use De Broglie Equation [ENDORSED]
- Replies: 11
- Views: 5218
Re: When to use De Broglie Equation [ENDORSED]
De Broglie's Equation is used to get a direct relationship between wavelength and momentum.
- Sat Oct 21, 2017 10:17 pm
- Forum: DeBroglie Equation
- Topic: λ=c/v VS. λ=h/mv
- Replies: 9
- Views: 13095
Re: λ=c/v VS. λ=h/mv
DeBroglie's equation is used because it is the only equation that is a direct link between wavelength and momentum.
- Sat Oct 21, 2017 10:07 pm
- Forum: Properties of Light
- Topic: Photoelectric Effect Post-module Question
- Replies: 2
- Views: 748
Re: Photoelectric Effect Post-module Question
Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 105 m.s-1. The work function for sodium is 150.6 kJ.mol-1. What is the frequency of the incident light on the metal surface? E(photon) = work function + Kinetic Energy h * frq = work function + (1/2)(mass)(velocity)^2
- Fri Oct 13, 2017 8:17 pm
- Forum: Properties of Light
- Topic: Prefix Conversion
- Replies: 12
- Views: 1366
Re: Prefix Conversion
I think it just depends on the specific problem and your preference!
- Fri Oct 13, 2017 8:00 pm
- Forum: Photoelectric Effect
- Topic: Confused about photoelectric effect! [ENDORSED]
- Replies: 6
- Views: 986
Re: Confused about photoelectric effect! [ENDORSED]
Hi! The photoelectric effect simply explains that light acts as a particle not as a wave. In a wave the higher the intensity the more energy was released. But this experiment instead showed that changing the intensity did not make a difference but instead the frequency had to be different. Light is ...
- Fri Oct 06, 2017 1:21 pm
- Forum: Limiting Reactant Calculations
- Topic: Limiting Reacant Problems made easy
- Replies: 2
- Views: 619
Re: Limiting Reacant Problems made easy
its also helpful to find a sample product by assuming that each reactant is the limiting reactant. the product that comes out to be the smallest will show which one is the limiting reactant!
- Fri Oct 06, 2017 1:18 pm
- Forum: Empirical & Molecular Formulas
- Topic: Empirical Coefficients [ENDORSED]
- Replies: 12
- Views: 5799
Re: Empirical Coefficients [ENDORSED]
From what I learned you round up when its bigger than .5 and round down when its smaller than .5