CHEMISTRY COMMUNITY

nanditasundarapandian1D

amphoteric is when it can react with acids and bases right?

nanditasundarapandian1D

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...

nanditasundarapandian1D

single bond = sigma bond

double bond = sigma + pi bonds

triple bond = sigma + 2pi bonds

so yes essentially pi bonds from double and triple bonds

nanditasundarapandian1D

Yes, because lone pairs would simply be another area of electron density.

nanditasundarapandian1D

it helps explains resonance

nanditasundarapandian1D

also concentration is n/v in the PV = nRT equation. That's why we are able to get a correlation between them.

nanditasundarapandian1D

Can someone explain how taking away heat affects the equilibrium reaction?

nanditasundarapandian1D

Na: That was sodium funny

Ne: I slapped my neon that one

nanditasundarapandian1D

What kind of dogs do chemists have?

laboratory dogs ;)

nanditasundarapandian1D

If it's +/- 4. its easier to write it out like this

(4+4)-(4-4)

nanditasundarapandian1D

It's not necessarily a rule but just as a guide that the more electronegative one will more likely hold the negative charge.

nanditasundarapandian1D

Spins basically just shows which direction the electron is going in. Counter clockwise or clockwise.

nanditasundarapandian1D

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.

nanditasundarapandian1D

Can you explain how to solve this problem in general?

nanditasundarapandian1D

De Broglie's Equation is used to get a direct relationship between wavelength and momentum.

nanditasundarapandian1D

DeBroglie's equation is used because it is the only equation that is a direct link between wavelength and momentum.

nanditasundarapandian1D

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

nanditasundarapandian1D

I think it just depends on the specific problem and your preference!

nanditasundarapandian1D

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 ...

nanditasundarapandian1D

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!

nanditasundarapandian1D

From what I learned you round up when its bigger than .5 and round down when its smaller than .5

CHEMISTRY COMMUNITY

Search found 21 matches

Re: Determining Amphoteric Compounds

HW 12.45

Re: Do pi bonds only form with double/triple bonds?

Re: Hybridization and lone pairs

Re: Delocalized π bonds

Re: Kc to Kp Conversion

Le Chatelier's Principle

Re: Post All Chemistry Jokes Here

Re: Post All Chemistry Jokes Here

Re: Uncertainty Principle [ENDORSED]

Re: Expanding an Octet [ENDORSED]

Re: Hund's Rule [ENDORSED]

Re: 3.57

Re: Confused on Problem 1.57 (regarding the Balmer Series)

Re: When to use De Broglie Equation [ENDORSED]

Re: λ=c/v VS. λ=h/mv

Re: Photoelectric Effect Post-module Question

Re: Prefix Conversion

Re: Confused about photoelectric effect! [ENDORSED]

Re: Limiting Reacant Problems made easy

Re: Empirical Coefficients [ENDORSED]