## Search found 21 matches

Sat Mar 12, 2016 10:35 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: 2013 Final Q3C
Replies: 2
Views: 483

### Re: 2013 Final Q3C

I think if the temperature is at 25 degrees celsius, you can use either. If it isn't you would use ln.
Thu Mar 10, 2016 8:40 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Winter 2012 Final Exam Q1B
Replies: 1
Views: 334

### Re: Winter 2012 Final Exam Q1B

I think what it is saying is that the heat of the reaction is negative that of the heat of the water. This is the same as what you are saying because the reaction is losing heat(which is why it is negative) and the water is gaining heat.
Tue Mar 08, 2016 12:33 am
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Winter 2012 Final Exam question 1B
Replies: 2
Views: 500

### Re: Winter 2012 Final Exam question 1B

I think it assumes the reaction occurs at 298K because that is the starting temperature given in the original question for the reaction.
Mon Feb 29, 2016 1:15 pm
Forum: *Alkanes
Topic: "Tert-" Prefix
Replies: 5
Views: 610

### Re: "Tert-" Prefix

When naming a molecule using the tert prefix, is it taken into consideration for the alphabetical ordering? I am asking because I was a little confused about the order of the solution to 1.17 in the organic textbook, 4-tert-Butyl-1,2-dimethylcyclohexane.
Sat Feb 27, 2016 12:01 pm
Forum: *Alcohols
Topic: Propanol
Replies: 1
Views: 418

### Re: Propanol

The oxygen would actually be attached to the carbon in the center(the second carbon), because the first and last carbons are CH3.
Wed Feb 17, 2016 8:25 pm
Forum: General Rate Laws
Topic: Rate Laws & Constants
Replies: 1
Views: 330

### Re: Rate Laws & Constants

The book is correct, because the order of the reactant does not depend on the stoichiometric coefficient.
Tue Feb 02, 2016 5:20 pm
Forum: Balancing Redox Reactions
Topic: Balancing Cell Reactions
Replies: 1
Views: 229

### Re: Balancing Cell Reactions

As far as I know, you would have to reverse a half reaction if it is the oxidation reaction because the values used to calculate cell potential would be standard reduction potential, and this would be reversed for oxidation. Also, the electrons on each side of the equation need to cancel out when ad...
Tue Jan 26, 2016 3:24 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Units for Standard Enthalpies of Formation
Replies: 1
Views: 335

### Re: Units for Standard Enthalpies of Formation

The units would be in kJ/mol for standard enthalpy of formation.
Tue Jan 19, 2016 10:09 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.43 Heating Curve
Replies: 1
Views: 276

### Re: 8.43 Heating Curve

I was actually wondering the same thing. Could the gap maybe mean the temperature of the compound was increased before the start of the experiment?
Tue Jan 12, 2016 9:01 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpy
Replies: 1
Views: 343

### Re: Bond Enthalpy

I think if the molecules aren't in their gas state, you would use the values given of the enthalpy of formation for whatever state they are in to calculate bond enthalpy.
Sat Dec 05, 2015 3:55 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2007 Final question 2C
Replies: 1
Views: 299

### Re: 2007 Final question 2C

The question states that the the element is found in period 3. Therefore, it would be Si because it is in period 3 while C is in period 2.
Wed Nov 25, 2015 11:26 am
Forum: Conjugate Acids & Bases
Topic: formulas for conjugate bases
Replies: 1
Views: 381

### Re: formulas for conjugate bases

For CH3COOH, the conjugate base would be CH3COO-. To get the formula for the conjugate base, you would take away a hydrogen from the formula of the acid, because a base accepts protons and having a negative charge will allow it to do this.
Thu Nov 19, 2015 10:13 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Finding Equations Given Partial Pressures
Replies: 2
Views: 887

### Re: Finding Equations Given Partial Pressures

I'm not entirely sure about part a), but it might be because of how the curves change relative to each other. In part b), they might be dividing the kPa values by 100(in the solutions manual) because they want the answer in atm and 100 kPa is equal to 1 atm.
Thu Nov 19, 2015 9:48 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Carbonic acid classificiation
Replies: 1
Views: 2542

### Carbonic acid classificiation

Why is carbonic acid considered an inorganic acid when it contains carbon?
Sun Nov 15, 2015 6:36 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ethylenediamine and edta
Replies: 1
Views: 422

### Re: Ethylenediamine and edta

From what I remember, the coordination number would be the number of bonds, so since ethylenediamine is bidental and forms 2 bonds, the coordination number would reflect this(basically when calculating the coordination number you would add 2 instead of 1), and the same thing would apply for EDTA.
Sun Nov 15, 2015 6:33 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Chelates
Replies: 1
Views: 333

### Re: Chelates

A chelate is anything containing a ligand that forms a ring of atoms including a central metal atom. I'm not too sure about the second part of your question, though.
Mon Nov 09, 2015 1:14 pm
Forum: Lewis Structures
Topic: Sulfur Dioxide Formal Charges
Replies: 3
Views: 1522

### Re: Sulfur Dioxide Formal Charges

From what I heard, the actual structure found through experimentation involves 1 double bond and 1 single bond, but for the purpose of having the lowest formal charges we would use the model with 2 double bonds.
Sat Oct 31, 2015 12:16 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Bond Order
Replies: 4
Views: 618

### Re: Bond Order

From what I remember, higher bond order means a shorter, stronger bond.
Sun Oct 18, 2015 9:23 pm
Forum: Quantum Numbers and The H-Atom
Topic: Negative electron energy
Replies: 2
Views: 629

### Re: Negative electron energy

I was wondering this also, and I think it might have to do with the fact that electrons are negatively charged particles.
Sun Oct 11, 2015 12:25 am
Forum: Administrative Questions and Class Announcements
Topic: Practice Quiz for Quiz 1
Replies: 3
Views: 512

### Re: Practice Quiz for Quiz 1

It is most likely the one that does not list the solutions at the end, so I'm pretty sure its the third quiz 1!
Sun Oct 04, 2015 7:37 pm
Forum: Molarity, Solutions, Dilutions
Topic: Titration
Replies: 2
Views: 642

### Re: Titration

Expanding on titration, I was looking at question L41 in the fundamental section which states: A chemist is titrating a solution of KOH of unknown concentration with 0.0101 M HCl(aq);a number of events occur during the titration. In the solutions manual, it states that a small amount of distilled wa...