CHEMISTRY COMMUNITY

JasmineChavez 1E

My TA actually said that we should know how to name molecules with two functional groups, or at least be able to recognize it because question 9B on the Winter 2015 practice final asks us to draw the molecules 1,3,4,5,6-pentahydroxy-2-hexanone and 3-hydroxypentanoic acid. These both have two functi...

JasmineChavez 1E

Hello,

I was just wondering if there was a place where the quiz solutions are posted so I might view them as a way to study for the final. I feel like i saw that somewhere for 14a but wasn't able to find anything on either website for 14b

JasmineChavez 1E

Hello, taking a chance here and requesting that there are no cycloheptane compounds on the final exam that we have to draw the line structure for. I know it has seven carbons but on the quiz we had one and i spent more time trying to figure out how to draw the shape out with seven carbons than I sho...

JasmineChavez 1E

Since the common names were made before the IUPAC do we HAVE to know the common names and their structure at this point .. for example will we be given problems with common names rather than IUPAC names and be expected to draw them or give the formula based on that on the quiz or final?

JasmineChavez 1E

Could someone draw out this compound and explain the different parts of the name in correspondence with the compound because I tried and I looked it up but its confusing me.

JasmineChavez 1E

Once I told a chemistry joke... there was no reaction

boy I really slapped my Neon that one!

JasmineChavez 1E

What is it? I know we get the values in a table but what exactly is it a measure of?

JasmineChavez 1E

If G products= G reactants then how is there a difference between the standard energies of the two that gives us the equation deltaG=-RT lnK ?

JasmineChavez 1E

I thought Gibbs was pretty simple but then when we go do problems things get a little confusing; if Gibbs represents the energy to do work for a spontaneous process, what is any energy that is not Gibbs and what is it doing?

JasmineChavez 1E

He only used C because we were talking about an aqueous solution in this example so it stood for concentration rather than using K in the other equation for a gas

JasmineChavez 1E

I am A female
Fe= Iron
Male=Man

therefore... I am Iron Man

JasmineChavez 1E

Daniela Contreras 3E wrote:What is the chemical formula for a banana?
BaNa2

Ha ha ha ha ha good one.

JasmineChavez 1E

The periodic table is incomplete....

Because only Chuck Norris knows the element of surprise >;)

JasmineChavez 1E

This still confuses me as well because I understand that steam has more energy because it underwent a phase change but how can we have steam and water in different phases but at the same temperature?? Also, is energy not also a measure of heat? How can steam have more energy but still be the same te...

JasmineChavez 1E

I know we're discussing enthalpy right now but I always get confused when thinking of the word because entropy is so similar... Does anyone have any suggestions for mnemonics device to distinguish between the two?

JasmineChavez 1E

In the book there is a table with the values, do we have to memorize them or are they things that will be given in the problems if asked on the final and/or future quizzes

JasmineChavez 1E

Why do you use moles in the ICE table if in the end your answer is in M? was that a mistake or do you not need to calculate Molarity first?

JasmineChavez 1E

in the video, pKa was looked up in a chart in the book... will this be given to us during the final or is this something we have to memorize? What chart exactly also??

JasmineChavez 1E

The salt is the provider of the conjugate base, therefore by adding the salt will increase the conjugate base concentration. We add salts because they do not change the volume of the solution and because the cation that is paired with the conjugate base does not affect the pH (usually Na + or K + )...

JasmineChavez 1E

Why don't weak acids completely dissociate and strong acids do even though a weaker acid also has a weaker bond? I would assume that with a weaker bond it would be easier to dissociate but that is not the case and I am not sure why or what key concept I am missing here

JasmineChavez 1E

I keep reviewing the video from last Wednesday's lecture but I still do not understand how it is stronger. If pKa=0.52 for tricholoro and pKa=4.75 for regular acetic acid how is it that the pKa is 10,000 times stronger? I see the trend that the larger the pKa the weaker the acid as it would be on th...

JasmineChavez 1E

Is there a correlation between ionic character and the strength of a bond? For example, if one ion has more ionic character than another, is the bond weaker or stronger? if you think about the trends of the periodic table you might be able to better visualize the correlation by when looking at a co...

JasmineChavez 1E

I think your best bet would be to go by definition and look at your chemical equation. "A solvent is a substance that dissolves a solute (a chemically different liquid, solid or gas), resulting in a solution. A solvent is usually a liquid but can also be a solid or a gas." SO look at the r...

JasmineChavez 1E

Rachel Song 3H wrote:I'm having difficulty being able to watch the video. I downloaded the software and installed it to my computer but it keeps telling me to install the software again. Is there another medium the review session could be uploaded to, like youtube?

See my last reply ^^

JasmineChavez 1E

Franca Park 3I wrote:I'm having technical difficulty. I downloaded the plug in but it still won't load. it says plug in failure

If you're trying to watch the video off of Chrome it won't work. Try Mozilla Internet Explorer or Safari

JasmineChavez 1E

So when a chemical bond forms the resulting arrangement of the two nuclei and their electrons had a lower energy than the total energy of the separate atoms. I could totally mesmerize this fact, but I want to know why and what happens that makes this so

JasmineChavez 1E

Are we supposed to have the correct sig figs for each step or just the final answer? Thanks! Only the final answer requires the correct number of significant figures but for quizzes there are only a certain amount of points you can lose for significant figures. In others words you do not lose a poi...

JasmineChavez 1E

So as I am preparing for this first quiz coming up, I remember my TA telling us we should probably time ourselves when working through problems and it makes sense to me. I take it there are about 10 questions from the practice quizzes so I would have to average about four minutes per question, with ...

JasmineChavez 1E

So I keep reviewing The material in the beginning of the course reader and I never had the opportunity to learn Chemistry in high school so I am taking in a lot at once and some things are pretty broad, others are more detailed and I am just wondering how much of it I need to have memorized in order...

CHEMISTRY COMMUNITY

Search found 29 matches

Re: More than one functional group

quizzes 1-3 solutions

CycloHeptane Line structures

Common Names v IUPAC

Re: Quiz 3 Preparation

Re: Chemistry Jokes

Potential?

relationship between G and Gnot

Gibbs Free energy in a nutshell?

Re: Cp^n and Cr^n

Re: Chemistry Jokes

Re: Chemistry Jokes

Re: Chemistry Jokes

Re: Steam Burns vs. Water Burns

Enthalpy V Entropy

Table 12.1 and 12.2 Ka and Kb values

Re: Finding Chemical Equilibrium Concentrations

Re: Video: Buffer Solution, Henderson-Hasselbalch Equation

Re: Salts' Function In Buffers

Dissociation of Acids/base

Why is trichloroacetic acid stronger than acetic acid?

Re: Ionic Character and Strength of Bonds

Re: solvents in chemical equilibrium

Re: Video Recording of my Chem 14A Review Session Fall 2015

Re: Video Recording of my Chem 14A Review Session Fall 2015

How do Total energy from bonds work ?

Re: All students read this sig fig post [ENDORSED]

Quizzes

How much do I need to know for this class from course reader