## Search found 58 matches

Fri Mar 16, 2018 4:39 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: porous disk
Replies: 3
Views: 243

### Re: porous disk

in a cell diagram?
Fri Mar 16, 2018 4:38 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: porous disk
Replies: 3
Views: 243

### porous disk

What is a porous disk?
Fri Mar 16, 2018 4:29 pm
Forum: Balancing Redox Reactions
Topic: Basic conditions with OH
Replies: 3
Views: 249

### Re: Basic conditions with OH

awesome! thank you!
Fri Mar 16, 2018 3:08 pm
Forum: Balancing Redox Reactions
Topic: increasing pH
Replies: 1
Views: 152

### increasing pH

why would increasing the pH of the solution increase the cell potential?
Fri Mar 16, 2018 3:06 pm
Forum: Balancing Redox Reactions
Topic: Basic conditions with OH
Replies: 3
Views: 249

### Basic conditions with OH

This is probably from 14A, but how can you get the concentration of OH and the pOH, when you are given the pH value ?
Fri Mar 16, 2018 3:04 pm
Forum: Calculating Work of Expansion
Topic: Conversion of R
Replies: 7
Views: 559

### Re: Conversion of R

what if pressure was not given to you? Would you use 8.314?
Fri Mar 16, 2018 2:15 pm
Forum: Calculating Work of Expansion
Topic: Conversion of R
Replies: 7
Views: 559

### Conversion of R

When using the Pv=nRt formula, do you represent R as 8.314 or 8.206 x10^-2?
Sun Mar 11, 2018 5:40 pm
Forum: Balancing Redox Reactions
Topic: redox
Replies: 6
Views: 417

### redox

How do you determine the oxidizing and reducing agent of a reaction?
Sun Mar 11, 2018 3:10 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Elementary Step
Replies: 4
Views: 264

### Elementary Step

What exactly is the definition of an elementary step? How does it relate to the concept of rate laws?
Sat Mar 03, 2018 2:57 pm
Forum: General Rate Laws
Topic: rate law
Replies: 3
Views: 218

### rate law

How do you determine the rate law for a reaction with more than one reactant?
Sat Mar 03, 2018 2:52 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Forward/Reverse [ENDORSED]
Replies: 1
Views: 136

### Forward/Reverse[ENDORSED]

How is the equilibrium constant related to the forward and reverse rate constants of elementary reactions contributing to an overall reaction?
Sat Mar 03, 2018 2:51 pm
Forum: General Rate Laws
Topic: half-life
Replies: 8
Views: 433

### half-life

What is the purpose of determining a half life?
Sat Mar 03, 2018 2:49 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Learning Models [ENDORSED]
Replies: 1
Views: 154

### Learning Models[ENDORSED]

How does the collision model and the activated complex model account for the temperature dependence of reactions ?
Tue Feb 20, 2018 6:48 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: homework question
Replies: 1
Views: 198

### homework question

In homework question 14.33, why do they change the sign of the given gibbs free energy to negative?
Tue Feb 20, 2018 4:59 pm
Forum: Balancing Redox Reactions
Topic: oxidation
Replies: 4
Views: 347

### oxidation

What is the oxidation state of o2 ? is it neutral?
Mon Feb 19, 2018 12:45 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Equilibrium constant
Replies: 3
Views: 277

### Equilibrium constant

what is the relationship between standard cell potential and equilibrium constant of a reaction.?
Sun Feb 18, 2018 9:35 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: n
Replies: 3
Views: 252

### n

How do you calculate the value of n when finding gibbs free energy when given a chemical equation?
Sun Feb 18, 2018 7:01 pm
Forum: Balancing Redox Reactions
Topic: Balancing
Replies: 3
Views: 221

### Balancing

I'm having a bit trouble adding how many electrons to a redox or oxidation half reaction.. Is there a specific method I use or an easier way to find the net charge of electrons?
Sat Feb 10, 2018 9:19 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Third law
Replies: 3
Views: 237

### Third law

What do you need to know about the third law of thermodynamics
Sat Feb 10, 2018 9:19 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Gibbs free
Replies: 5
Views: 344

### Gibbs free

What is the difference between Gibbs free energy and enthalpy ?
Sat Feb 10, 2018 9:18 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Entropy
Replies: 3
Views: 258

### Entropy

What equations do you need to solve entropy problems
Tue Feb 06, 2018 8:05 pm
Forum: Balancing Redox Reactions
Topic: oxidation
Replies: 4
Views: 275

### oxidation

How do you find the oxidation state number?
Tue Feb 06, 2018 8:04 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: exothermic
Replies: 5
Views: 355

### exothermic

If a flask turns cold, can you automatically assume that the reaction is exothermic?
Tue Feb 06, 2018 8:03 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: formula
Replies: 3
Views: 194

### formula

When do we use the delta s= qrev/t formula?
Sat Jan 27, 2018 6:34 pm
Forum: Calculating Work of Expansion
Topic: equation
Replies: 2
Views: 171

### equation

When do you use w=-pdeltav equation? and when do you use the equation that includes the gas constant
Fri Jan 26, 2018 1:01 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Reversible and Irreversible
Replies: 3
Views: 217

### Reversible and Irreversible

Is there an easier explanation to describe when a system is reversible or irreversible?
Wed Jan 24, 2018 6:50 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Calorimetry
Replies: 4
Views: 275

### Calorimetry

In calculating calorimetry problems, do you need to change Celcius to Kelvin in the initial and final temperatures? Or can you leave it as either or ?
Tue Jan 16, 2018 8:59 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: First Law
Replies: 2
Views: 200

### First Law

Can someone explain how the knowledge of the first law will help us in calculations?
Tue Jan 16, 2018 8:57 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: reaction enthalpies
Replies: 1
Views: 96

### reaction enthalpies

How do you find how much heat is absorbed in a reaction?
Tue Jan 16, 2018 8:56 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: internal energy
Replies: 5
Views: 293

### internal energy

How do you find the change of internal energy?
Sat Jan 13, 2018 4:32 pm
Forum: Phase Changes & Related Calculations
Topic: Methods of Enthalpy
Replies: 8
Views: 473

### Re: Methods of Enthalpy

Possibly, it depends on the type of question that Lavelle puts on his test, and whether or not there will be an A, B or C. Just be prepared for anything at this point.
Sat Jan 13, 2018 4:28 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Specific Heat
Replies: 2
Views: 147

### Specific Heat

In order to find the specific heat capacity, is there a go to formula that I need to use to solve the problems in the homework?
Sat Jan 13, 2018 4:27 pm
Forum: Administrative Questions and Class Announcements
Topic: Re-registering
Replies: 1
Views: 147

### Re-registering

Ive recently reregistered my account so that aligns with my discussion in 14B, but my posts and number of posts from 14A still show on my account. Is that okay?
Sat Jan 13, 2018 4:20 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond enthalpies
Replies: 2
Views: 134

### Bond enthalpies

What exactly is the purpose for determining the specific bond enthalpy of a chemical reaction? What is the specific purpose?
Sat Dec 09, 2017 9:39 pm
Forum: Conjugate Acids & Bases
Topic: Protanation
Replies: 2
Views: 311

### Protanation

What is acid/base protonation ?
Sat Dec 09, 2017 9:38 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Conjugate seesaw
Replies: 3
Views: 395

### Conjugate seesaw

What exactly is the conjugate seesaw again?
Sat Dec 02, 2017 10:31 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: difference in acids
Replies: 3
Views: 329

### difference in acids

Is a Bronsted acid/base the opposite of a Lewis acid/base?
Sat Dec 02, 2017 10:30 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: strength
Replies: 2
Views: 237

### strength

How can you calculate which acid/base is the stronger acid/base?
Fri Nov 24, 2017 5:19 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination number [ENDORSED]
Replies: 3
Views: 334

### Coordination number[ENDORSED]

When finding the coordination number, do you have to always draw the lewis structure to find the number of bonds? or is there a simpler way?
Fri Nov 24, 2017 5:18 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxidation number
Replies: 1
Views: 121

### Oxidation number

How do you find the oxidation number in coordination compounds?
Sun Nov 19, 2017 9:43 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: MOT
Replies: 2
Views: 231

### MOT

Will we be covering Molecular orbital theory in lecture?
Sun Nov 19, 2017 9:41 pm
Forum: Hybridization
Topic: Hybridization
Replies: 2
Views: 197

### Hybridization

To find hybridization, do you always have to draw a Lewis Structure?
Tue Nov 07, 2017 7:17 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant
Replies: 3
Views: 356

### Limiting Reactant

Is it correct to assume that the limiting reactant is always the value that has the smallest amount of moles out of the two that are being compared?
Mon Nov 06, 2017 9:59 am
Forum: Ionic & Covalent Bonds
Topic: Characterization [ENDORSED]
Replies: 2
Views: 223

### Characterization[ENDORSED]

How do you tell when a compound has more ionic character or covalent character?
Sat Nov 04, 2017 11:04 pm
Forum: Lewis Structures
Topic: Formal Charge
Replies: 1
Views: 118

### Formal Charge

For finding the formal charge, would it be okay to just do valence electrons - the total number of electrons?
Thu Nov 02, 2017 7:16 pm
Forum: Lewis Structures
Topic: Expanded rules
Replies: 4
Views: 194

### Expanded rules

How do you know which elements can be used as an expanded octet when forming a Lewis Structure?
Sat Oct 28, 2017 4:01 pm
Forum: Trends in The Periodic Table
Topic: Electron affinity [ENDORSED]
Replies: 4
Views: 310

### Electron affinity[ENDORSED]

How does electron affinity affect the elements/ electrons of an element ?
Thu Oct 26, 2017 8:47 pm
Forum: Trends in The Periodic Table
Topic: Periodic Trends
Replies: 2
Views: 194

### Periodic Trends

When a question asks, "determine the highest SECOND ionization energy" how do you determine that? Its different from determining which ionization energy is greater.
Sat Oct 21, 2017 9:07 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Solving
Replies: 2
Views: 169

### Solving

When solving for the Heisenberg uncertainty, does the greater than or equal to sign turn into just an equal sign?
Mon Oct 16, 2017 8:43 pm
Forum: DeBroglie Equation
Topic: Conversions
Replies: 3
Views: 320

### Conversions

When converting g to kg, do we just multiply the grams by 10^-3 ?
Sun Oct 15, 2017 11:50 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Upcoming Test
Replies: 5
Views: 373

### Re: Upcoming Test

Okay, also, for homework due in our discussion, will it be covering Chapter 2 or Chapter 3. Since, we have yet to start chapter 2?
Sun Oct 15, 2017 4:23 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Upcoming Test
Replies: 5
Views: 373

### Upcoming Test

Should we be familiar with Uncertainty problems for the test this coming week?
Tue Oct 10, 2017 7:56 pm
Forum: Properties of Light
Topic: Calculating the wavelength of light [ENDORSED]
Replies: 5
Views: 457

### Calculating the wavelength of light[ENDORSED]

Exactly when do you use the equation E= hc/ lambda (wavelength) ?
Sun Oct 08, 2017 6:56 pm
Forum: Properties of Light
Topic: Conversions
Replies: 3
Views: 221

### Conversions

How would you convert m to nm when finding the wavelength?
Sun Oct 08, 2017 6:41 pm
Forum: Properties of Light
Topic: Calculating the wavelength of light
Replies: 2
Views: 172

### Calculating the wavelength of light

In example 1.1 of "The Quantum World", the book uses 2.998 x 10^8 as the speed of light to calculate the wavelength, however, the book gives the speed of light as 3 x 10^8 . Which one is sufficient?
Thu Oct 05, 2017 11:34 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant info [ENDORSED]
Replies: 6
Views: 566

### Limiting Reactant info[ENDORSED]

When asking for the limiting reagent, is the smallest amount of moles that you get of a certain compound always going to be the limiting reagent?
Tue Oct 03, 2017 2:34 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant- Excess
Replies: 4
Views: 368

### Limiting Reactant- Excess

When a question asks for a limiting reactant or reagent, does finding the excess mean the other substance that has more product or is there another formula?
Tue Oct 03, 2017 2:31 pm
Forum: Balancing Chemical Reactions
Topic: Combustion Question
Replies: 9
Views: 746

### Re: Combustion Question

Yes, combustion (anything that burns or is burning) always has the product of carbon dioxide and water.