CHEMISTRY COMMUNITY

Drishti_Jain_1D

When is an OH group on an organic molecule named as a -hydroxy- and when is it named as an -ol?

A specific example of this can be seen on Winter 2015 Final Question 9B where in 1,3,4,5,6-pentahydroxy-2-hexanone hydroxy is also an -OH group.

Drishti_Jain_1D

If the first step is the rate limiting step and it is a reaction that goes in the forward and reverse direction, why isn't the overall reaction rate the forward reaction rate over the reverse reaction rate in the rate limiting step?

Drishti_Jain_1D

Why is CH3Cl an electrophile if Cl is full of lone pairs?
Is it only the carbon region that is an electrophile?
Does that make CH3Cl both a nucleophile and an electrophile?

Thanks!

Drishti_Jain_1D

Q: What do you do with a sick chemist?

A: First you try to helium, then you try to curium, but if that fails, then you have to barium.

Drishti_Jain_1D

Can someone please explain why the half reaction for oxidation of the reaction in this problem is O3 --> O2 when both the oxidation charges of these molecules are 0? Doesn't oxidation need to have a loss of electrons from the reactant to product?

Drishti_Jain_1D

For some textbook problems, the change in entropy when temperature changes uses the equation S=nCln(T2/T1) and for some, the equation S=nRln(T2/T1) is used. How do you know which equation to use under certain conditions?

Drishti_Jain_1D

Is there anyway to obtain the change in entropy when only change in enthalpy is known? Is there a derivation in which this would be possible, or do you just assume change in enthalpy acts like a heat (q)?

Drishti_Jain_1D

Homework Question 8.41 asks for a the final temperature when an ice cube has been placed in water at a certain temperature. Using the correct equations for heat and enthalpy, I am continuously getting the same answer for the final temperature: 33 degrees Celsius. However, the solutions manual says t...

Drishti_Jain_1D

What did the policeman say to the atom?

I've got my ion you!

Drishti_Jain_1D

Hi,

I wanted to review Lecture 3 on bruincast. I was able to do it on my computer, but I was wondering if the iphone version wasn't working for anyone else, or if it'll be working anytime soon?

Thank you.

Drishti_Jain_1D

For question 13.23, how do you know that you're only supposed to add 30 mL of HCl to calculate final pH since there was no indication of when to stop the titration in the problem?

Drishti_Jain_1D

2HCl --> H2 + Cl2
Pressures in order of HCl, H2, and Cl2 are 2.0, 1.0, 3.0. Why do you have to push the reaction as far to the left as possible? And how do you do this? Why can't you first find Q and use that to determine which eay the reaction moves when using ICE?

Drishti_Jain_1D

Are polyprotic acids always weak acids, or are there any examples of strong polyprotic acids?

Drishti_Jain_1D

For problem 11.3 in the textbook, how can you determine that it is Flask 3 that is at equilibrium without any value of K?

Drishti_Jain_1D

How do you draw the molecular orbital diagram for HF? I tried looking up the answer but was confused by the energy states for H.

Drishti_Jain_1D

What is the significance of finding bond order when you have already drawn a Lewis Structure? In other words, what can bond order tell you about the strength of a bond that the Lewis structure can't show you?

Drishti_Jain_1D

When do we know if an electron will be promoted or not? And also, how do you know when promotion will lead to a lower energy state for the atom or not?

Drishti_Jain_1D

Thank you for your help!

Drishti_Jain_1D

How many (a) nodal planes, (b) radial nodes are there in a 3p-orbital? Focusing on part b, in the textbook, number of radial nodes = n - l -1. For this problem, using the 3p orbital, I concluded that n = 3, due to the shell of the electron and l =1, due to the fact that this is the p orbital. These ...

Drishti_Jain_1D

In the equation En= -hR/n^2, does En represent the potential energy of the photon? If not, what type of energy is this equation alone solving for?

Drishti_Jain_1D

I understand that #15 in the textbook is supposed to be solved using Rydberg's Equation; however, is it possible to use the equation we covered in class for an H-atom (En = -hR/n^2) in order to solve it? And if not, is Rydberg's Equation given to us on quizzes or tests?

Drishti_Jain_1D

In the setup of an Atomic Spectroscopy experiment, does the detector read the wavelengths of light absorbed and emitted or the frequencies of light absorbed and emitted? Also, why does it matter which one is detected if you can use the equation c= frequency x wavelength in order to solve for the mis...

CHEMISTRY COMMUNITY

Search found 22 matches

OH Group Hydroxy vs. Alcohol

The Rate Limiting Step

CH3Cl

Re: Post All Chemistry Jokes Here

HW 14.5

Change in entropy when temperature changes

Entropy

Homework 8.41

Re: Post All Chemistry Jokes Here

Bruincast

Homework 13.23

HW 11.67 Reasoning

Polyprotic Acids and strength

Textbook 11.7 (a)

Molecular Orbital Diagram for HF [ENDORSED]

Bond Order Conceptual Question

Conceptual question

Re: Energy in the Atomic Spectroscopy

Chapter 2 Homework #15

Energy in the Atomic Spectroscopy

Chapter 1, Problem #15

The Atomic Spectroscopy Experiment