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NMSU / Chemistry / CHEM 112 / What is a dipole in chemistry called?

What is a dipole in chemistry called?

What is a dipole in chemistry called?

Description

School: New Mexico State University
Department: Chemistry
Course: General Chemistry II
Professor: Deanna dunlavy
Term: Fall 2018
Tags: chem112
Cost: 50
Name: Chem 112 Exam 2 notes
Description: These notes cover what will be covered in the upcoming exam. Hope you all study!
Uploaded: 09/16/2018
2 Pages 32 Views 2 Unlocks
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Exam Study Guide


What is a dipole in chemistry?



study sou

bh

& Ionic bond - A bond with a cat-ion & an anion

- usually ametal & nonmetal however Hy & makes a change

- like ametal X Covalent bond- 2 atoms sharing one or more electrons

Ex. Ha H&H (share electrons to be stable) * Dipole -Dipole forces- attraction of polar molecules with opposite


How do you know if a molecule has london dispersion forces?



partial charges & I think of it as an Ionic bond who a London dispersion - In everything!! Anything forced together on not Don't forget about the age old question of Relative and absolute can be used to describe which theme?

forced together has london clispersion. TEMPORARY

- The LDF increases as mass increases * Hyclrogen Bond-H & N, O, or F (Hydrogen bonding is FON)


Which molecules can form hydrogen bonds?



If you want to learn more check out When does the marketing of a product begin?

Polar of Non polar depend on Electronegativity

Electronegativitus the ability of an atom to attract electrons

I to ittelf Tonic

moleculan Intrer

Ionic borting

no H Bond yes LDE

Polar?

H-Bonel

Antre

Inter

yes

CF

LDE

Example:

Dipole-dipole H-C-FS LIDE

I-U

Ia}LDF

-

I

- H-C-N-H

Dipde-Dipole

HBond © Dipole Dipole

HBr

HH JLDF

Intra molecular

CO2} LDF

Intermolecular

are

stronger

than

Endothermic-heat absore © Exothermic-heat given of We also discuss several other topics like What are the 3 different types of inequality?

Solid

Study Soup

Sublimation

freezing

cleposition

condensation

A

& liquid

Vaporization

Study

vapor pressure - amount of vapor at given pressure XD Hvap - Energy needed to vaporize

EX- weak intermolecular forces - high vapor pressure - lowat vap high low low

VP Atvap viscosity Boiling point * The higher molar mas

the higher Hvap UP DHvap viscosity Boiling point * Hydrogen bonds

increase Boiling point * soluble - liquid & solid * Miscible-liquid & liquid

solute - dissolved in the solvent solvent - whatever has the most grams or me Henrys Law - solubility of a gas increaces with pressime We also discuss several other topics like What are metric multipliers?

think of the soda can- When the can is closed there is a lot of pressure the gas Mixes, with the u

Tauid but when opened the sas escapes

» Study

You really have to practice. Soluble linsoluble 4 Electrolytes 6 memorize strong acids (soluble) Special solubles If you want to learn more check out What makes a social problem?

HCL

- Acetate CH3COO! HC104 any of these used Ammonium NH4 HBr

Barium Ba o are strong most HT

Nitrate NO2 HNO3 electrolytes,

Cyanide CN H2SO4

Sodium Na

Potassium K.

. Also any Alkali Metal G1 C NH2 & NH3 are bases & make OH- & are weak electrolytes. Don't forget about the age old question of Will the persistent avoidance of situations that a person fears trigger another panic attack?

coot is a weak crid-weak electrolyte

- so if an H is on the end of acetate it is weak

EX: CH3OH+H2O NR nonelectrolyte

Mn(NO3)2 h 2+ + NO3 Strong Electrolyte pbco 2Pb+ + cošo weak Electrolyte

metal corbonate

Ionic

V SOU

Study

If Ionic it has to be weak or strong

Then you can memorize the special solubles

above and use the Ionic solubility Chart

Study

stody Soup

g of solute adoled

Molality (m)- nsolute

J Bg Soluent Could write it like

moles (n) = šoluto molar mass

Stadys

( g sol la I mm solo

ka solu

means it

you need to find moles you t multiply but

if not you divide

top

If looking for

multiply Lt Molari

nsol

I gsol

I solution

L

of soluto

(mm sol

n by

a bottom, divide

Mole fraction (x) = nsot

nsol nsoln

mole solute

moles solution

when

nsoltnsolv

or

o

g soln

No

of Imsol Insol

gsol or

- X 100 at = Imsoltmsolu?

Colligative properties Characteristics of solutions that depend on the concentration

and not the solute dissolved in the solvent

V * vapor Pressure Reduction pure is highest TX Boiling pont Elevation pure is Lowest & * freezing point depression lowest has highest hoff factor

hoff factor = í =ration Fe(NO3)3 Fe +30 Raoults Law = PA=XAPA

PA= vapor pressure above a solition CH3 COOHE H0+ CH3C00 XA = mole fraction of Solvent A

T + T = 2>i> 1 PA =vapor Pressure of solvent

- If no reaction iall

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