CHEMISTRY COMMUNITY

Minu Reddy

Hi Everyone,
I was wondering if we need to know how to draw a boat conformation?

Thank you

Minu Reddy

So is it correct to assume that due to the electron electron repulsion that occurs in the eclipsed conformation, there is always torsional strain ONLY in the eclipsed conformation?

Thank you!

Minu Reddy

Can someone please help me to understand when to use iso-, neo-, sec-, and tert, when doing IUPAC naming?

Thank you

Minu Reddy

The pre equilibrium approach is used when you are trying to write the rate law for a mechanism and there is a fast step followed by a slow step. You know that the overall rate law is dependent on the rate law of the slowest step, but since the slowest step is preceded by a fast step then there may b...

Minu Reddy

The reason you add less ice is because the orange juice has a lower heat capacity and therefore does not need as much heat to be cooled.

Minu Reddy

Hi Everyone,
I was wondering how you would covert the gas constant and other constants that have units in K to units in C?

Thank you so much!

Minu Reddy

Hi everyone,
I was wondering if someone could please explain how in a concentration cell, the standard potential difference is = to 0V when the components are at different concentrations?

Thank you

Minu Reddy

Hi Everyone,
I have a question on #10.

So when I did the problem, I divided 200/20, but I was wondering if someone can please explain the conversion factor to get the answer on the key?

Thank you

Minu Reddy

Hi everyone,

I was wondering if someone could please explain to me how caliometry allows us to calculate specific heat capacity?

Thank you so much,
Minal Reddy

Minu Reddy

Hi everyone, I have a question regarding elements that are in their most stable form. Specifically, I know that Oxygen for example is in its most stable form when it is O2 and likewise for the rest of the diatomic molecules, but I was wondering if we need to know other examples of elements in their ...

Minu Reddy

Hi Everyone,
I was wondering if anyone happens to know if the same policy (the workbook points can replace the lowest grade) that was used for the quizzes in Chem 14A with Dr. Lavelle is going to be used this quarter as well?

Thank you so much

Minu Reddy

Dr. Lavelle recently answered this question. But it is based on the concept that that top left nitrogen has two bonds and two lone pairs therefore the formal charge is 5-6=-1.

Minu Reddy

The HH equation is used when considering the idea for a buffer that a weak acid and its conjugate base or a weak base and a conjugate acid must be in equal concentrations for optimum buffering capacity. Therefore when you solve the equation considering their equal concentrations, you will get that P...

Minu Reddy

I'm so sorry if this question has already been asked. But am I correct in remembering that Dr. Lavelle mentioned if the k value is less than 10^-4 then it is ok to approximate? Or do you just have to look at if the value of x is less than 5% of the initial concentration?

Thank you!

Minu Reddy

When the reaction is exothermic and you add heat to the products side, and if there is an increase in heat then wouldn't the reaction shift to the left not to the right?

Thank you

Minu Reddy

When we draw the atomic orbitals in an MO diagram for anions or cations do we show the added or removed electrons in our atomic orbitals or just in our molecular orbitals?

Thank you! :)

Minu Reddy

If you are asking in regards to the vsepr structures, I would say that we do not need to know anything outside of what was covered in the course reader and on the midterm.

Minu Reddy

Ok thank you very much.

But isn't this a concept that we have not covered yet?

Minu Reddy

Hi, I was wondering if someone could please explain that if a question asks how an increase in the pressure or a decrease in the volume of a reaction will affect the direction the reaction favors how do you figure it out? For an example, can someone please explain Fall 2014, Question 6. What conditi...

Minu Reddy

I am a little confused on chelates and the monodentates and polydentates. Are chelates and polydentates ligands that can form a coordinate covalent bond with a transition metal in more than 1 place? In other words, the chelate is a name for a single ligand that has more than one electron rich atom t...

Minu Reddy

I have a very basic question regarding drawing the molecular orbital diagrams.

Just to confirm, we draw the diagram using the number of valence electrons not the atomic number. But the atomic number determines which type of molecular orbital diagram we draw. (Z>=8 or Z<8)?

Thank you.

Minu Reddy

Remember that when trying to deal with isoelectronic atoms, it is often the cations and the anions that cause atoms to be isoelectronic. For example when you have a cation, you remove electrons and when you have an anion you add electrons. The adding and removing of electrons is based on the charge ...

Minu Reddy

To correctly determine the polarity of a molecule, it is very important to draw the molecule according to its actual shape because attempting to determine the polarity solely by looking at the lewis structure can cause you cancel out dipole moments and get a nonpolar molecule when the molecule is ac...

Minu Reddy

In general, the trend of ionization energy is that is increases across a period and decreases down a group. The highest ionization energy elements exist on the upper right hand corner of the periodic table. All you have to remember for the exceptions is that Nitrogen and elements with a half filled ...

Minu Reddy

Remember that the ionization energy increases across a period and decreases across a group.

So you would want to pick elements that are on the bottom left hand corner of the periodic table.

Minu Reddy

Could anyone please remind me what the periodic trend is for electronegativity?

I was also wondering what the difference between electronegativity and ionization energy is?

Thank you so much

Minu Reddy

The reason is because the third row in the periodic table corresponds to the third energy level which is n=3. Given that n=3, you can have l values of 0,1,2. l=2 corresponds to a d sub level and because there are 5 orbitals in a d sub level, you can have a total of 10 electrons which is why elements...

Minu Reddy

I remember that this is a two part question so you have to use the threshold energy from the first part of the experiment!

You can't solve the problem without this value:)

Minu Reddy

I spoke to some TA's regarding the same questions about listing the states of matter, and they said that for the purposes of this quiz, you should mainly focus on the balancing part of the equation. But I don't think that it hurts if you list the states of matter if you know them!

Minu Reddy

Perhaps, there is an error in your calculations because when you multiply the given wavelength by the mass of the electron you get a value that is 6.63*10^-39. Then when you divide "h" Planck's constant by that value you must get 1*10^5. In regards to if the answer is reasonable, I know th...

Minu Reddy

I have a question regarding including si units when we are solving a problem on any form of assessment?
Is it necessary to include units at all times or only in the final answer?

Thnak you very much.

CHEMISTRY COMMUNITY

Search found 31 matches

Re: Final Exam Details and Review Sessions Winter 2017

Re: steric and torsional strain

Re: Quiz 3 Winter 2017

Re: Pre-equilibrium

Re: Winter 2013 Midterm Q2A

Gas Constants and other constants

Concentration Cell

Re: Quiz 1 Preparation Answers

Caliometry

Re: Enthalpy: State Properties

Quiz Policy

Re: Charge of ligand

Re: Henderson-Hasselbalch Equation

Re: Treating Systems that have Small Equilibrium Constants

Re: Exothermic and Endothermic

Atomic Orbitals in MO theory

Re: Drawings for Final

Re: Ideal Gas Law and Equilibrium Constant

Ideal Gas Law and Equilibrium Constant

Chelates

Re: What is MO theory for? [ENDORSED]

Re: Ground state

Re: Polarity

Re: Ionization Energy

Re: Central Atom

Re: Electronegativity and Electron Affinity. [ENDORSED]

Re: Octet Rule Exception [ENDORSED]

Re: Module question

Re: Determining States of Matter in Reactions

Re: Post Module Question [ENDORSED]

Including Units in a Problem