## Search found 24 matches

Wed Mar 15, 2017 10:24 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: How to determine which chemicals produce a high voltage
Replies: 7
Views: 5416

### Re: How to determine which chemicals produce a high voltage

So, in order to solve this problem, we would need to be given the half reactions, right? We wouldn't be expected to know which elements is the higher/lower oxidizing or reducing agent.
Wed Mar 15, 2017 9:58 am
Forum: *Amines
Topic: Final 2013 5A
Replies: 3
Views: 799

### Final 2013 5A

Will we be expected to know primary or secondary amines on the final?
Thu Mar 02, 2017 12:12 pm
Forum: *Alkanes
Topic: Alphabetical Naming Order After Lowest Carbon?
Replies: 1
Views: 319

### Re: Alphabetical Naming Order After Lowest Carbon?

Yes, always you make sure that the substituents are bonded to the lowest carbons possible. However, in naming based on the IUPAC, you just concern yourself with the alphabetical order. It does not matter, in naming, whether the numbers are in the correct order. As you recall in lecture, we had an ex...
Mon Feb 20, 2017 7:14 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 2 Winter 2017
Replies: 160
Views: 17186

### Re: Quiz 2 Winter 2017

What problems out of the textbook given in the course reader would be sufficient in covering kinetics? Because some of the problems begin to cover activation energies, which we are not being tested on in this quiz. Would it be up until 5.55?
Mon Feb 20, 2017 3:37 pm
Forum: First Order Reactions
Topic: Slope of k
Replies: 3
Views: 575

### Slope of k

Why do the zero order and first order reactions have a negative slope, while the second order has a positive slope? Will we need to know how to derive these formulas as well?
Sun Feb 12, 2017 11:59 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: HW 14.15 C
Replies: 1
Views: 278

### HW 14.15 C

Write the half-reactions and devise a cell diagram for Cd(s) + 2Ni(OH)3(s) --> Cd(OH)2(s) + 2Ni(OH)2(s)

The answer for the cell diagram is Cd(s)|Cd(OH)2(s)|KOH(aq)||Ni(OH)3(s)|Ni(OH)2(s)|Ni(s)

Where do you get the KOH from? And the Ni(s)?
Sun Feb 12, 2017 11:34 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Homework 14.13 D
Replies: 1
Views: 254

### Homework 14.13 D

The problem asks to write the half-rxns, the balanced equation for the cell reaction, and the cell diagram for Au+(aq) --> Au(s) + Au3+(aq) How am I supposed to do this problem and determine what would be the cathodes and anodes? With just one reactant, I don't know where to start. The book writes t...
Sat Feb 11, 2017 6:39 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8042
Views: 1412357

### Re: Post All Chemistry Jokes Here

Heisenberg and Schrödinger get pulled over for speeding. The cop asks Heisenberg “Do you know how fast you were going?” Heisenberg replies, “No, but we know exactly where we are!” The officer looks at him confused and says “you were going 108 miles per hour!” Heisenberg throws his arms up and cries,...
Wed Feb 08, 2017 10:44 pm
Forum: First Order Reactions
Topic: First vs. Second Order
Replies: 7
Views: 1126

### First vs. Second Order

What is the difference between First Order and Second Order Reactions?
Fri Feb 03, 2017 3:12 pm
Forum: Student Social/Study Group
Topic: 2007 Midterm Question 4
Replies: 1
Views: 366

### Re: 2007 Midterm Question 4

You don't need to memorize any specific heat values. On your formula sheet, you are provided with all you need to know. If there is further information needed, such as the specific heat, it will be provided with the question.
Wed Jan 25, 2017 9:38 am
Forum: Calculating Work of Expansion
Topic: Homework Problem 8.93
Replies: 1
Views: 295

### Homework Problem 8.93

For 8.93, it says to calculate the work that must be done against the atmosphere for the expansion of the gaseous products in the combustion of 1 mol C6H6 at 25 degrees C and 1 bar. So I figured that I would use the formula w=-P'delta'V and replace it to instead use w=-'delta'nRT. Looking at the sol...
Sun Jan 22, 2017 11:38 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Degeneracy
Replies: 1
Views: 380

### Degeneracy

What exactly is degeneracy? I am confused on what it is and how it applies to thermodynamics. Why can't it be found exactly?
Thu Jan 19, 2017 12:20 am
Forum: Calculating Work of Expansion
Topic: Provided conversions? [ENDORSED]
Replies: 2
Views: 431

### Provided conversions?[ENDORSED]

Will we be provided the conversions for tests? For example, on Chapter 8 question 3, 101.325J/L*atm was needed to convert units to joules.
Fri Jan 13, 2017 4:18 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8042
Views: 1412357

### Re: Post All Chemistry Jokes Here

My favorite frequency is 50,000 Hz.

You've probably never heard it before.
Wed Nov 30, 2016 10:50 pm
Forum: Calculating the pH of Salt Solutions
Topic: HW 12.33(c)
Replies: 1
Views: 443

### HW 12.33(c)

A student added solid Na2O to a 200.0-mL flask, which was then filled with water, resulting in 200.0 mL of NaOH solution. 5.00 mL of the solution was then transferred to another flask and diluted to 500.0mL. The pH of the diluted solution is 13.25. What is the concentration of OH- in (a) the diluted...
Sat Nov 26, 2016 12:17 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8042
Views: 1412357

### Re:Chemistry Jokes

Are you made of Nickel, Cerium, Arsenic and Sulfur?
Because you’ve got a NiCe [censored]!
Tue Nov 15, 2016 2:20 pm
Forum: *Molecular Orbital Theory Applied To Transition Metals
Topic: Bond Order
Replies: 2
Views: 1104

### Re: Bond Order

If atoms share a triple bond, that is surely shorter and stronger than that of a double bond, and a double bond is shorter and stronger than that of a single bond. The more bonds that atoms share, the more stable it is. Bond order tells us the number of chemical bonds between a pair of atoms, and th...
Sat Nov 12, 2016 10:19 am
Forum: Octet Exceptions
Topic: Chapter 2 Quiz #7: Expanded Octets
Replies: 1
Views: 509

### Re: Chapter 2 Quiz #7: Expanded Octets

It is because Ne is too small. If you were to draw the Lewis Structure for XeO2F2, 6 shared electron bonds (One bond from each F, and two bonds from each O) and 2 unpaired electrons would be attached to the central atom in order for the formal charges to all be zero. This makes sense because oxygen ...
Thu Nov 03, 2016 7:15 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Bonding vs Antibonding
Replies: 3
Views: 569

### Bonding vs Antibonding

I understand how to write the Molecular Orbital diagrams and how to include the bonding and antibonding orbitals. However, I don't completely understand what it means for an orbital to be bonding or antibonding. What is the difference?
Thu Oct 27, 2016 8:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSPER Model [ENDORSED]
Replies: 2
Views: 427

### VSPER Model[ENDORSED]

Is the VSPER Model the same thing as the VSPER Formula? Or does one get the other?
Fri Oct 21, 2016 7:11 am
Forum: Electronegativity
Topic: Difference between electron affinity and electronegativity
Replies: 3
Views: 1236

### Re: Difference between electron affinity and electronegativity

In order to transfer one electron from an atom to another, the electron affinity should be met. Electron affinity is a measure of how much energy is released when an electron is gained by a certain atom; it is also the amount of energy required in order to detach the electron from the other atom. So...
Tue Oct 11, 2016 3:48 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Question about Uncertainty in Velocity [ENDORSED]
Replies: 1
Views: 361

### Re: Question about Uncertainty in Velocity[ENDORSED]

∆v is change in velocity, and so the ± ____ m/s refers to the uncertainty of that value. For example, say that the ∆v is 50 m/s ± 2. This means that there is an uncertainty in which your velocity could range from 48 to 52, because you added or subtracted 2 from 50. If you now notice, finding ∆v is t...
Thu Oct 06, 2016 2:14 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orientation of the Orbitals
Replies: 3
Views: 539

### Orientation of the Orbitals

I am confused about the orientation of the orbitals. Do the various types of orbitals all overlap one another? For example, there are the three p-orbitals: px, py, and pz, and there are the 5 d-orbitals and the 7 f-orbitals. Can all of these different orbitals occur at the same n level? Looking at t...
Thu Sep 29, 2016 12:03 pm
Forum: Limiting Reactant Calculations
Topic: Homework Problem M11c
Replies: 1
Views: 363

### Homework Problem M11c

For question M11c in the Chemistry Review section, the problem asks to find the mass of the excess reactant. I assumed that it would need to find the excess amount of phosphorous. However, when I looked at the solutions manual, it solves for the excess reagent of phosphorous(III) oxide. Why do I sol...