## Search found 67 matches

Thu Mar 14, 2019 10:22 am
Forum: *Free Energy of Activation vs Activation Energy
Topic: Modelks of Reactions
Replies: 1
Views: 446

### Modelks of Reactions

In the 7th edition for topic 7D how much do we need to know about models of reactions?
Mon Mar 11, 2019 3:20 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagram and Ecell [ENDORSED]
Replies: 10
Views: 39449

### Re: Cell Diagram and Ecell[ENDORSED]

how can you tell which is the anode and which is the cathode?
Mon Mar 11, 2019 3:19 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Concentration cell textbook question 6N. 3A self test [ENDORSED]
Replies: 4
Views: 39869

### Re: Concentration cell textbook question 6N. 3A self test[ENDORSED]

so its correct that the anode is always on the left of the concentration cell right?
Mon Mar 11, 2019 3:17 pm
Forum: *Electrophiles
Topic: final
Replies: 7
Views: 756

### final

how evenly is the final going to be distributed among topics?
Wed Mar 06, 2019 2:57 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Volume and Temperature
Replies: 2
Views: 96

### Volume and Temperature

do we need to know what happens if both the entropy and temperature changes in a reaction?
Wed Mar 06, 2019 2:55 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Arrhenius Equation
Replies: 1
Views: 135

### Arrhenius Equation

In the Arrhenius equation, what is the A?
Wed Mar 06, 2019 2:54 pm
Forum: Zero Order Reactions
Topic: Reaction orders
Replies: 2
Views: 195

### Reaction orders

How can you tell the difference between a first/second/and third order reaction?
Tue Feb 26, 2019 3:41 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: galvanic/voltaic
Replies: 2
Views: 85

### galvanic/voltaic

whats the difference between an galvanic and a voltaic cell?
Tue Feb 26, 2019 3:41 pm
Forum: Balancing Redox Reactions
Topic: common charges
Replies: 2
Views: 104

### common charges

are there any common charges that we should know besides the fact that oxygen is 2-?
Tue Feb 26, 2019 3:27 pm
Forum: Balancing Redox Reactions
Topic: basic
Replies: 3
Views: 119

### basic

When balancing basic reactions, how can you tell how many -OH should be added?
Tue Feb 19, 2019 12:46 pm
Forum: General Rate Laws
Topic: Rate constant units
Replies: 6
Views: 544

### Re: Rate constant units

It's helpful to just write all your units out and then see which ones cancel!
Tue Feb 19, 2019 12:45 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Activation energy
Replies: 8
Views: 301

### Re: Activation energy

The activation energy is the energy required for a reaction to happen!
Tue Feb 19, 2019 12:42 pm
Forum: General Rate Laws
Topic: test 3
Replies: 6
Views: 227

### test 3

Do we know which sections test 3 will be on yet?
Mon Feb 11, 2019 4:17 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: linear molecules vs nonlinear molecules [ENDORSED]
Replies: 1
Views: 232

### linear molecules vs nonlinear molecules[ENDORSED]

will we be expected to know the vsepr shapes for molecules to determine whether they are linear or not?
Mon Feb 11, 2019 4:12 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Positional Disorder
Replies: 1
Views: 110

### Positional Disorder

what is the difference between positional disorder and other types of disorder?
Mon Feb 11, 2019 4:05 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: systems [ENDORSED]
Replies: 2
Views: 393

### systems[ENDORSED]

is there a correlation between open/closed/isolated systems and exothermic/endothermic systems?
Thu Feb 07, 2019 1:12 pm
Forum: Environment, Fossil Fuels, Alternative Fuels
Topic: midterm
Replies: 3
Views: 496

### midterm

Is this information about the environment and fossil fuels included on the midterm?
Thu Feb 07, 2019 1:10 pm
Forum: Administrative Questions and Class Announcements
Topic: How to find my posts
Replies: 57
Views: 48528

### Re: How to find my posts

You have to first click on the class your'e in and the topics to be able to post!
Thu Feb 07, 2019 1:05 pm
Forum: Phase Changes & Related Calculations
Topic: sections
Replies: 4
Views: 201

### sections

Which sections specifically are we going to be tested on on the midterm?
Mon Jan 28, 2019 1:23 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Le Chatelier's Principle
Replies: 3
Views: 205

### Le Chatelier's Principle

does le chatelier's principle apply to all chemical reactions or only those at equilibrium?
Mon Jan 28, 2019 1:23 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Le Chatelier's Principle
Replies: 2
Views: 169

### Le Chatelier's Principle

What effect does Le Chatelier's principle have when the pressure is increased in a reaction that has an even amount of moles on either side?
Mon Jan 28, 2019 1:22 pm
Forum: Ideal Gases
Topic: sre
Replies: 5
Views: 205

### sre

What is a standard reaction enthalpy?
Mon Jan 28, 2019 1:22 pm
Forum: Phase Changes & Related Calculations
Topic: Properties
Replies: 2
Views: 128

### Properties

What's the difference between an extensive and intensive property?
Mon Jan 28, 2019 1:21 pm
Forum: Phase Changes & Related Calculations
Topic: SI Unit
Replies: 2
Views: 121

### SI Unit

Is this official SI unit joules or kilojoules?
Mon Jan 28, 2019 1:21 pm
Forum: Phase Changes & Related Calculations
Topic: Heat Capacity
Replies: 10
Views: 420

### Heat Capacity

Whats the difference between heat capacity and molar heat capacity?
Sat Jan 19, 2019 10:15 pm
Forum: Ideal Gases
Topic: kc vs kp
Replies: 19
Views: 847

### kc vs kp

can kp also be used in place of kc?
Sat Jan 19, 2019 10:14 pm
Forum: Ideal Gases
Topic: ice
Replies: 4
Views: 244

### ice

what's the difference between the ice tables for acid base reactions and for regular equilibrium reactions?
Thu Jan 17, 2019 1:28 pm
Forum: Ideal Gases
Topic: office hours
Replies: 1
Views: 97

### office hours

will office hours this coming monday and other sessions be cancelled because of mlk day?
Fri Jan 11, 2019 5:16 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ICE
Replies: 2
Views: 95

### ICE

What does ICE stand for?
Fri Jan 11, 2019 5:16 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kp vs Kc
Replies: 6
Views: 204

### Kp vs Kc

Is one of Kp or Kc more important?
Fri Jan 11, 2019 5:15 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equations
Replies: 6
Views: 223

### Equations

What is the difference between Kc and Kp?
Sat Dec 08, 2018 11:51 am
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 4
Views: 240

### VSEPR

For something with the formula AXE3, would the bond angles be 180 because the molecular shape is linear?
Tue Dec 04, 2018 7:32 pm
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Definitions of Acids and Bases
Replies: 1
Views: 232

### Definitions of Acids and Bases

What is the most commonly used and accepted definition of acids and bases?
Tue Dec 04, 2018 7:31 pm
Forum: Identifying Acidic & Basic Salts
Topic: Acids and Bases
Replies: 4
Views: 443

### Acids and Bases

What is a method for identifying the salts that are produced from the acid- base neutralization reactions?
Mon Dec 03, 2018 10:36 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: acids and bases
Replies: 3
Views: 153

### acids and bases

should we memorize the strong acids??
Sat Dec 01, 2018 11:53 am
Forum: Naming
Topic: Naming
Replies: 3
Views: 165

### Naming

For the final, should we probably memorize some of the common names of polyatomic ions for the naming?
Sat Dec 01, 2018 11:11 am
Forum: Naming
Topic: Naming [ENDORSED]
Replies: 1
Views: 159

### Naming[ENDORSED]

For the final, should we probably memorize some of the common names of polyatomic ions for the naming?
Mon Nov 26, 2018 5:21 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 1
Views: 398

### Bond Angles

How can you tell when bond angles are going to be "slightly less than" 109.5/120, etc.??
Mon Nov 26, 2018 4:59 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test [ENDORSED]
Replies: 1
Views: 146

### Test[ENDORSED]

On the test if they asked us to draw the Lewis Structure, would the Lewis Structure that we've been drawing be fine or should we draw a Lewis structure that shows the angles??
Mon Nov 26, 2018 3:41 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 1
Views: 120

### VSEPR

For the molecule thionyl chloride (SOCl2), why is the shape trigonal pyramidal? Shouldn't the shape be T-shaped/trigonal bipyramidal?
Mon Nov 26, 2018 3:23 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining Shape
Replies: 4
Views: 177

### Determining Shape

For the compound ClO2+, how is the arrangement trigonal planar while the shape is angular?
Mon Nov 19, 2018 6:42 pm
Forum: Bond Lengths & Energies
Topic: double bonds vs. single bonds
Replies: 5
Views: 227

### double bonds vs. single bonds

Are double bonds or single bonds more stable?
Mon Nov 19, 2018 6:41 pm
Forum: Bond Lengths & Energies
Topic: VSEPR
Replies: 6
Views: 557

### VSEPR

how can you find the shape of GeF4 molecule?
Mon Nov 19, 2018 6:39 pm
Forum: Bond Lengths & Energies
Topic: Ball and Stick
Replies: 2
Views: 1590

### Ball and Stick

How does the ball and stick model change and the angles between the bonds change?
Tue Nov 13, 2018 1:14 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge
Replies: 4
Views: 232

### Formal Charge

Which is more important when it comes to stability- making sure that the formal charge is zero on everything or making sure that the octet rule is satisfied?
Tue Nov 13, 2018 1:13 pm
Forum: Octet Exceptions
Topic: Exceptions
Replies: 10
Views: 713

### Exceptions

How should we know which ones are exceptions?
Tue Nov 13, 2018 1:13 pm
Forum: Electronegativity
Topic: Polarity
Replies: 3
Views: 114

### Polarity

When we draw Lewis structures of polarizable things, should we label within the Lewis structure which ends is more polar?
Thu Nov 08, 2018 1:32 pm
Forum: Electronegativity
Topic: Polarity
Replies: 1
Views: 98

### Polarity

How are polarity and resonance connected? Do they vary in any way with each other?
Thu Nov 08, 2018 1:32 pm
Forum: Resonance Structures
Topic: Resonance Structures
Replies: 3
Views: 255

### Resonance Structures

Are resonance structures generally stronger/more stable than other structures?
Thu Nov 08, 2018 1:31 pm
Forum: Ionic & Covalent Bonds
Topic: Chemical Bonds
Replies: 5
Views: 219

### Chemical Bonds

Which bonds are longer, ionic or covalent? Or is the comparison not relevant?
Mon Oct 29, 2018 8:12 pm
Forum: DeBroglie Equation
Topic: Uncertainty
Replies: 4
Views: 288

### Uncertainty

For everyday objects, is it true that the uncertainty of any object is nonsignificant compared to how big the object is usually?
Mon Oct 29, 2018 8:11 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Energy Levels
Replies: 2
Views: 171

### Energy Levels

Why does energy increase when an electron goes up an energy level?
Mon Oct 29, 2018 8:11 pm
Forum: Trends in The Periodic Table
Topic: Coulombic potential energy
Replies: 2
Views: 152

### Coulombic potential energy

How do you write an expression for total coulombic potential energy and what does total coulombic potential energy mean?
Mon Oct 22, 2018 6:23 pm
Forum: Properties of Electrons
Topic: Orbitals
Replies: 5
Views: 475

### Orbitals

How many orbitals are present in the 4p subshell? How can you find this out?
Mon Oct 22, 2018 6:22 pm
Forum: Properties of Electrons
Topic: Predicting Nodal Planes
Replies: 2
Views: 214

### Predicting Nodal Planes

How do you predict the number of nodal planes expected for a 4f orbital?
Mon Oct 22, 2018 6:18 pm
Forum: Properties of Electrons
Topic: Nodal surfaces
Replies: 3
Views: 244

### Nodal surfaces

What is the difference between a radial node and an angular nodal surface?
Mon Oct 22, 2018 6:16 pm
Forum: Properties of Electrons
Topic: Electron Energy
Replies: 3
Views: 254

### Electron Energy

Why does the energy of the electron change when the hydrogen atom undergoes a transition from the 1s orbital to the 2p orbital because it says that "there are one 2s- and three 2p- orbitals in the shell and in hydrogen they all have the same energy"?
Wed Oct 17, 2018 1:21 pm
Forum: Properties of Light
Topic: Series
Replies: 4
Views: 193

### Series

Will we have to know the classifications of the series such as the differences between the Balmer and Lyman series for the test?
Wed Oct 17, 2018 1:17 pm
Forum: Properties of Light
Topic: Rydberg formula
Replies: 8
Views: 323

### Rydberg formula

How do you solve this problem: "In the ultraviolet spectrum of atomic hydrogen, a line is observed at 102.6 nm. Determine the values of n for the initial and final energy levels of the electron during the emission of energy that leads to this spectral line". I'm not really sure where to st...
Wed Oct 17, 2018 1:12 pm
Forum: Properties of Light
Replies: 3
Views: 173

Why is it that when frequency decreases, the extent of change in the electrical field at a given point also decreases?
Sat Oct 13, 2018 12:49 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect Initial Purpose
Replies: 4
Views: 203

### Re: Photoelectric Effect Initial Purpose

The purpose of the photoelectric effect was to explore how light was transmitted. They believed that light was transmitted based on the intensity of the light that can be seen. However, it was discovered that light is actually transmitted based on the frequency and wavelength of the electron light w...
Sat Oct 13, 2018 12:46 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reagent
Replies: 10
Views: 865

### Re: Limiting Reagent

There is no difference between there being two limiting reagants and just one. You still find the mole ratio and the reagant with the smallest mole ratio is the limiting reagant.
Fri Oct 12, 2018 8:09 pm
Forum: DeBroglie Equation
Topic: Measurable wave length properties
Replies: 3
Views: 136

### Re: Measurable wave length properties

It depends on the wavelength- if the wavelength is too small, it will not be measurable. Around 10 x ^-18 nm is when wavelengths become measurable. Smaller than that, the wavelengths are not measurable.
Sun Oct 07, 2018 7:00 pm
Forum: Limiting Reactant Calculations
Topic: Theoretical Yield
Replies: 7
Views: 363

### Re: Theoretical Yield

The theoretical yield is always larger than the actual yield because the theoretical yield is the calculated yield. When we calculate the yield, we use perfect numbers and assume that the reaction will go perfectly as planned. However, in the real world, there are many different factors involved in ...
Sun Oct 07, 2018 12:03 am
Forum: Balancing Chemical Reactions
Topic: Balancing reactions tips
Replies: 29
Views: 1177

### Re: Balancing reactions tips

I balance the equation based on whether the elements are in a compound or not! I balance the elements in compounds first, because the elements not in compounds or in compounds of just themselves (ex: O2) are easier to change around later.
Sun Oct 07, 2018 12:00 am
Forum: Empirical & Molecular Formulas
Topic: Calculation/Finding the Empirical Formula
Replies: 2
Views: 187

### Re: Calculation/Finding the Empirical Formula

It is neither an educated guess nor an approximation- using the method of solving the empirical formula that we found in class, you should be able to find the exact empirical formula. While the numbers may not be exact, they should be relatively close (within a tenth). Since the numbers are within a...
Sun Oct 07, 2018 12:00 am
Forum: Empirical & Molecular Formulas
Topic: Calculation/Finding the Empirical Formula
Replies: 2
Views: 187

### Re: Calculation/Finding the Empirical Formula

It is neither an educated guess nor an approximation- using the method of solving the empirical formula that we found in class, you should be able to find the exact empirical formula. While the numbers may not be exact, they should be relatively close (within a tenth). Since the numbers are within a...