Search found 20 matches

by Srivinay_Irrinki
Sat Mar 12, 2016 4:58 pm
Forum: *Cycloalkenes
Topic: 2013 Final Exam Question 6A
Replies: 1
Views: 340

2013 Final Exam Question 6A

For this Cycloalkene structure, why is there not a Z(cis) added to the name? Aren't the priority groups on the same side of the double bond?
by Srivinay_Irrinki
Wed Mar 09, 2016 4:47 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Textbook problem - chain structure with cis and trans
Replies: 1
Views: 304

Re: Textbook problem - chain structure with cis and trans

For this question look at the two substituents that are coming off the respective carbon-carbon double bonds, one is pointing up while the other is pointing down, meaning the substituents are on opposite sides of the double bonds indicating trans.
by Srivinay_Irrinki
Tue Mar 08, 2016 9:57 pm
Forum: *Alcohols
Topic: Naming Conventions
Replies: 1
Views: 309

Naming Conventions

On Page 54 of the Introduction to Organic Chemistry textbook, the molecule at the very top right is labeled as:

2-Methylbut-3-en-2-ol

Would it still be correct to name this molecule:

2-Methyl-3-buten-2-ol
by Srivinay_Irrinki
Sun Mar 06, 2016 6:13 pm
Forum: Administrative Questions and Class Announcements
Topic: Video Competition
Replies: 66
Views: 24955

Re: Video Competition

Chemistry Math Assistance Video on Calorimetry/Heat Transfer.

https://youtu.be/Ejv0cuFimk4


By: Srivinay Irrinki (Lecture 3)
Sandeep Gurram (Lecture 2)
Uma Ramaratnam (Lecture 2)
by Srivinay_Irrinki
Mon Feb 29, 2016 3:16 pm
Forum: *Cycloalkanes
Topic: double bonds
Replies: 1
Views: 267

Re: double bonds

For the most part, yes. Since the parent chain must have the double bond in it, you should number the parent chain starting from the end closest to a carbon atom double bond.
by Srivinay_Irrinki
Mon Feb 22, 2016 8:59 pm
Forum: *Alkanes
Topic: Finding the Main chain
Replies: 2
Views: 405

Re: Finding the Main chain

Yes, when determening the main chain, it does matter which carbon you start with. To expand on Ronald's example, consider a molecule that is seven carbons long if you go directly from left to right, but has a branch of 3 carbons on the 5th carbon. In this case, the chain starting with the branch and...
by Srivinay_Irrinki
Mon Feb 08, 2016 8:00 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Entropy Concepts
Replies: 1
Views: 240

Entropy Concepts

If there are two compounds, and one has a higher molecular weight, but the other is more molecularly complex, which one has a higher molar entropy under standard conditions?
by Srivinay_Irrinki
Tue Feb 02, 2016 12:03 am
Forum: Balancing Redox Reactions
Topic: oxidizing agents
Replies: 1
Views: 356

Re: oxidizing agents

Ce^4+ < In^3+ < Co^2+ < Cl2.

Oxidizing agents in simple terms are molecules that under go a reduction reaction, meaning they gain electrons. Therefore, you should order these molecules in order of which is more likely to under go reduction.
by Srivinay_Irrinki
Mon Jan 25, 2016 12:03 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Chapter 8 Problem 65 - Hess's Law
Replies: 1
Views: 426

Re: Chapter 8 Problem 65 - Hess's Law

In this problem, in order to obtain the formation equation, you must manipulate the given equations in a way that you end up with NO in the reactants, and N2O5 in the products. The way to do this is multiply Eq. 1 by 2, making it : 1: 4 NO + 2O2 ----> 4NO2 Delta H: -228.2 kJ 2: 4NO2 + O2 ---> 2N205 ...
by Srivinay_Irrinki
Wed Jan 13, 2016 12:46 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Mean Bond Enthalpy
Replies: 2
Views: 684

Re: Mean Bond Enthalpy

The reason that the H-O bond enthalpy is multiplied by 2, is that there are two H-O bonds within the H2O molecule. That means that two H-O bonds are formed during this reaction, which is why you must subtract the H-O bond enthalpy value twice.
by Srivinay_Irrinki
Sun Dec 06, 2015 10:40 pm
Forum: *Titrations & Titration Calculations
Topic: Weak acid/strong base titrations with M(OH)2 bases
Replies: 1
Views: 416

Re: Weak acid/strong base titrations with M(OH)2 bases

Hi Izzy, All steps would be carried out the same as if you were titrating with NaOH for example. The only difference would be that when you set up your ice table, it would be 2 OH -, and the change would be +2x, so when you set up your Kb Equation, the OH term would be: (2x)^2. Everything else will ...
by Srivinay_Irrinki
Sun Nov 29, 2015 11:29 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Strong acids
Replies: 1
Views: 377

Re: Strong acids

Hi Shreya,

Usually acids with a pKA value less than -1.74 are considered strong, but Chloric Acid has a pKA of about -1. Therefore, it is not considered a strong acid in technical terms. You should confirm with Professor Lavelle on why it is listed as strong in the textbook.
by Srivinay_Irrinki
Sun Nov 22, 2015 11:45 pm
Forum: Lewis Acids & Bases
Topic: Identifying Acids and Bases
Replies: 2
Views: 425

Re: Identifying Acids and Bases

Hi Catherine, When looking at a chemical reaction, the way you will be able to identify which compound is an acid or a base, is by looking at the transfer of protons throughout the reaction. A base will accept a proton (usually in the form of a hydrogen ion), so if the number of hydrogens is greater...
by Srivinay_Irrinki
Sun Nov 15, 2015 10:53 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Determining Change in Concentration
Replies: 1
Views: 272

Re: Determining Change in Concentration

Hi Ashlee,

When calculating the amount by which the concentrations of reactants and products change, you should always use the molar ratio (coefficients) from your balanced chemical equation. Put these into your Ice Table in forms such as (X, 2X, Etc..).
by Srivinay_Irrinki
Sun Nov 08, 2015 11:00 pm
Forum: Ideal Gases
Topic: Equilibrium Constant and Phases
Replies: 1
Views: 382

Re: Equilibrium Constant and Phases

Hi Heisenberg, I think the reason solids and liquids are not included in the EQ constant calculation is that the concentrations of solids and liquids do not change throughout the course of a reaction, so it would not make sense to include them in the calculation formula. On the other hand, the conce...
by Srivinay_Irrinki
Mon Nov 02, 2015 12:05 am
Forum: Lewis Structures
Topic: FC when drawing Lewis Structures on ionic compounds
Replies: 1
Views: 369

Re: FC when drawing Lewis Structures on ionic compounds

Hi Keirsten, I think that in this situation, it would be best to draw the lewis structure where both atoms had the 1- charge, as they will both be more individually stable. However, I think that in most cases this problem will not arise, and it will be pretty clear on which lewis structure in the mo...
by Srivinay_Irrinki
Sun Oct 25, 2015 11:39 pm
Forum: Lewis Structures
Topic: exceptions to octets
Replies: 2
Views: 419

Re: exceptions to octets

Hi Amy,

You are correct as Boron is also an exception to the octet rule as it can fill its "octet" with only 3 formed bonds. Other exceptions you should also remember are the elements that can have expanded octets such as sulfur and phosphorus.
by Srivinay_Irrinki
Sun Oct 18, 2015 11:25 pm
Forum: Resonance Structures
Topic: Which Resonance Structure to Use?
Replies: 2
Views: 492

Re: Which Resonance Structure to Use?

Hi Heisenberg, When drawing lewis structures that have resonance, you should make sure to draw out each individual resonance structure as they vary slightly from one another in terms of formal charge on their respective atoms. The actual lewis structure of this molecule will be the "average&quo...
by Srivinay_Irrinki
Sun Oct 11, 2015 10:28 pm
Forum: Quantum Numbers and The H-Atom
Topic: Understanding the ml (Magnetic Quantum Number)
Replies: 2
Views: 977

Understanding the ml (Magnetic Quantum Number)

I understand that N represents the shell and that l represents the subshell, but I am not understanding what part of the electron's orbital orientation ml represents? Can we determine which value of ml corresponds to which electron, or do we just chose any value in the range determined by what l is?
by Srivinay_Irrinki
Sat Oct 03, 2015 11:48 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Atomic Spectra
Replies: 1
Views: 258

Atomic Spectra

Can the Rydberg equation through the Atomic Spectra model work for other atoms when considering energy release through electron movement, or is it only applicable to the hydrogen atom?

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