Search found 20 matches

by janavi_patel_2K
Fri Mar 17, 2017 10:07 am
Forum: *Alcohols
Topic: Double bonds and functional groups
Replies: 1
Views: 670

Re: Double bonds and functional groups

Yes. We will not be given a compound that has both a functional group and a double bond.
by janavi_patel_2K
Wed Mar 08, 2017 12:14 pm
Forum: *Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
Topic: Common Names
Replies: 1
Views: 526

Re: Common Names

I believe that you need to know common names.
by janavi_patel_2K
Mon Mar 06, 2017 10:25 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Reaction Profiles
Replies: 2
Views: 412

Re: Reaction Profiles

I know that if the exergonic reaction is favorable and K>1, then Gibbs free energy is negative. If the endergonic reaction if favorable and K<1, then Gibbs free energy is positive.
by janavi_patel_2K
Tue Feb 21, 2017 11:04 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Pre-Equilibrium Method for Reaction Mechanisms
Replies: 3
Views: 449

Re: Pre-Equilibrium Method for Reaction Mechanisms

I believe you can use this method no matter which step the slow step is. The only important thing is to remember that the slow step is the rate determining step.
by janavi_patel_2K
Sun Feb 12, 2017 5:10 pm
Forum: Balancing Redox Reactions
Topic: 2014 Midterm #8 [ENDORSED]
Replies: 3
Views: 521

Re: 2014 Midterm #8 [ENDORSED]

I am still a little confused. In the textbook and the solutions manual, it states that the one with the more positive reduction potential is where reduction occurs and, therefore, contains the oxidizing agent. This means that the one with the higher reduction potential would be at the cathode. Howev...
by janavi_patel_2K
Sun Feb 12, 2017 4:59 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Oxidation Numbers
Replies: 4
Views: 563

Re: Oxidation Numbers

Typically, O is always going to be -2 and H is always going to be +1. Based on those oxidation numbers, you can use those to determine the oxidation of the other atoms in the molecule.
by janavi_patel_2K
Sun Feb 05, 2017 12:46 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Charge for Anode and Cathode
Replies: 2
Views: 292

Re: Charge for Anode and Cathode

Yes. In a Galvanic cell, the anode is negative and the cathode is the positive electrode. The reaction at the anode is oxidation and the reaction at the cathode is reduction.
by janavi_patel_2K
Sat Jan 28, 2017 12:49 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.53 / W=0 for Bomb Calorimeters ??
Replies: 1
Views: 287

Re: 8.53 / W=0 for Bomb Calorimeters ??

A bomb calorimeter is an isolated system in thermodynamics, which means that matter nor energy can be exchanged. Because of this, a bomb calorimeter means the volume is fixed. If there is no change in volume and there is a constant pressure, there is no work being done on the system. Therefore, the ...
by janavi_patel_2K
Tue Jan 17, 2017 6:12 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 8.87 Heat Capacity
Replies: 1
Views: 286

Re: 8.87 Heat Capacity

On page 269 of the textbook, in table 8.2, there is a list of specific and molar heat capacities of common compounds. In the table, the gives the specific heat capacity for H2O as a solid, liquid, and vapor.
by janavi_patel_2K
Sun Jan 15, 2017 4:16 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Ch 8 #31 (8.31)
Replies: 3
Views: 723

Re: Ch 8 #31 (8.31)

The formula to calculate the heat released is q = m*C*change in temperature. To calculate the heat capacity, C, for a constant pressure, the formula is 5/2R, which gives a value of 20.8 (J/mol)/(degree C). m is for the mass of the substance so you have to get the mass in grams. To do so, you do 5.02...
by janavi_patel_2K
Mon Nov 28, 2016 2:02 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Calculating pH and Ionization percentage
Replies: 1
Views: 305

Calculating pH and Ionization percentage

On page 156 of the course reader, in the example, it asks to find the pH and the percentage of ionization of acetic acid. However, the work shows finding the concentration of H3O+ and using that value to find the pH and the ionization percentage. Could someone explain why the pH and ionization perce...
by janavi_patel_2K
Sat Nov 26, 2016 8:38 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: change in temperature
Replies: 2
Views: 410

Re: change in temperature

Like you said, if a reaction is endothermic, it means it requires heat while forming a product. Therefore, increasing the temperature will favor product formation because it requires heat.If a reaction is exothermic, it means a reaction gives off heat. Therefore by increasing the temperature, it wil...
by janavi_patel_2K
Sun Nov 20, 2016 9:46 pm
Forum: Amphoteric Compounds
Topic: Inverse Relationship Between H3O+ and OH- [ENDORSED]
Replies: 2
Views: 5823

Inverse Relationship Between H3O+ and OH- [ENDORSED]

On Pg. 150-151 of the course reader, there is a calculation completed in order to calculate pH and pOH. The equation is Ba(OH)2 --> Ba^2+ + 2OH-. One of the first steps was to find the concentration in H3O+. I understand the how the value was obtained, but I do not understand why the concentration o...
by janavi_patel_2K
Sat Nov 12, 2016 9:59 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Chem Equilibrium
Replies: 3
Views: 393

Re: Chem Equilibrium

No, on the class website, it says we only need to know the first 4 pages of the lecture notes.
by janavi_patel_2K
Sat Nov 12, 2016 9:46 pm
Forum: Ideal Gases
Topic: Partial Pressure
Replies: 1
Views: 285

Re: Partial Pressure

I believe this is because gaseous reaction equilibria are expressed in terms of partial pressure. The equilibrium constant of pressure gives the ratio of pressure of products over reactants for a reation that is at equilibrium.
by janavi_patel_2K
Sun Oct 30, 2016 1:23 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: #17
Replies: 1
Views: 281

Re: #17

Since their are unpaired electrons on the central atom of Oxygen, the molecular geometry is AX2N1, which is angular. Therefore, the bond angle that is formed is slightly less than 120 degrees.
by janavi_patel_2K
Thu Oct 20, 2016 8:18 pm
Forum: Trends in The Periodic Table
Topic: Why is the second ionization energy of an atom always higher than its first ionization energy? [ENDORSED]
Replies: 2
Views: 315

Re: Why is the second ionization energy of an atom always higher than its first ionization energy? [ENDORSED]

I believe that this is because removing the second electron is always harder than removing the first electron. Once the first electron is removed, the electrostatic attraction energy increases and there is a net positive charge because one electron with a negative charge has already been removed. It...
by janavi_patel_2K
Sun Oct 16, 2016 3:44 pm
Forum: Ionic & Covalent Bonds
Topic: The Structure of Polyatomic Species
Replies: 1
Views: 288

Re: The Structure of Polyatomic Species

It just means "pair." SO, one pair of electrons would mean a single bond.
by janavi_patel_2K
Sun Oct 09, 2016 4:32 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Numbers and Atomic Orbitals
Replies: 3
Views: 559

Quantum Numbers and Atomic Orbitals

Hi! So, I understand that n is related to the size and energy of the orbital and is also referred to as the shell. Then, l describes the shape of the orbital and its values can be equal to 0,1,2,...,n-1. When l=0, is corresponds to the s-orbital, when it equals 1, it corresponds to the p-orbital, wh...
by janavi_patel_2K
Wed Sep 28, 2016 9:12 pm
Forum: Properties of Light
Topic: Rydberg Formula [ENDORSED]
Replies: 2
Views: 419

Rydberg Formula [ENDORSED]

When using the Rydberg Formula, how do you know which value is n1 and which value is n2? Is n1 always the smallest number, or does it depend how the question is phrased?

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