Search found 18 matches
- Sun Mar 19, 2017 8:54 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3619254
- Sun Mar 19, 2017 8:01 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3619254
- Sun Mar 05, 2017 7:01 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: Sign of the Gibbs for a reaction profile
- Replies: 3
- Views: 785
Re: Sign of the Gibbs for a reaction profile
In this case we were given a specific example of the reaction HBr and Propene which is defined to have products that are in lower energy than reactants. For now the organic textbook only went through three examples for each type of reaction (electrophilic addition, aromatic substitution, and the SN2...
- Sun Feb 26, 2017 11:50 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3619254
Re: Post All Chemistry Jokes Here
Since organics is coming up
- Sun Feb 19, 2017 3:43 pm
- Forum: First Order Reactions
- Topic: Chapter 15 question 19
- Replies: 2
- Views: 835
Re: Chapter 15 question 19
You can also look at experiments 2 and 3 to calculate the order for B.
If you calculate for the coefficient m below, it should equal to 2.
If you calculate for the coefficient m below, it should equal to 2.
- Sun Feb 12, 2017 2:47 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Winter Midterm 2015 Q4,5 D
- Replies: 1
- Views: 409
Winter Midterm 2015 Q4,5 D
I noticed that there is a three step calculation for the entropy - I understand why the first and second steps are there, but why is it necessary to include the third step in which the temperature goes back to room temperature?
- Sun Feb 05, 2017 9:16 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Standard Hydrogen Electrode
- Replies: 1
- Views: 432
Standard Hydrogen Electrode
Just to confirm, the standard hydrogen electrode is used as a reference to measure the reduction potentials of other elements?
- Sun Jan 22, 2017 4:09 pm
- Forum: Student Social/Study Group
- Topic: Chemistry Joke
- Replies: 28
- Views: 6517
- Sat Dec 03, 2016 11:32 pm
- Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
- Topic: Significant Figures for pH
- Replies: 1
- Views: 1045
Significant Figures for pH
When calculating pH, is it right that we always assume 3 significant figures for the pH?
- Sun Nov 27, 2016 11:21 pm
- Forum: Bronsted Acids & Bases
- Topic: Bronsted Acids and Bases
- Replies: 3
- Views: 919
Re: Bronsted Acids and Bases
If the compound is able to donate a proton, then it is a bronsted acid (e.g CH3COOH). If the compound is able to accept a proton, then it is a bronsted base (e.g. CH3COO-) - notice that the proton is denoted as H+
- Sun Nov 20, 2016 1:11 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Pressure/Expansion effect on products and reactants
- Replies: 2
- Views: 656
Re: Pressure/Expansion effect on products and reactants
Increase in pressure equals to a decrease in volume; what an increase in pressure does is that it increases all the molar concentrations within the system. What Le Chatelier's principle tells us is that in order to minimize this sudden increase in molar concentration, the equilibrium shifts to the s...
- Tue Nov 08, 2016 2:06 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: How to determine if ligands are polydentates?
- Replies: 2
- Views: 776
How to determine if ligands are polydentates?
This question is based on the homework question 33 in chapter 17; I understand that ligands have an atom with an electron pair to donate to form a coordinate bond; but how do you determine e.g. whether H2O is a monodentate and CO3(2-) is a mono/bidentate?
- Sun Nov 06, 2016 9:31 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Cis Vs. Trans
- Replies: 2
- Views: 678
Re: Cis Vs. Trans
I think the cis and trans deals with organic chemistry and will not likely be discussed heavily until then
- Mon Oct 24, 2016 5:50 pm
- Forum: Lewis Structures
- Topic: Question on 3.41
- Replies: 1
- Views: 504
Re: Question on 3.41
The order that you draw them in is presented by the name of the compound. NH2 and COOH are functional groups in organic compounds, so they always have the same structure (in which for NH2 two H's are bonded to N and for COOH, one O shares a double bond with C while the other O shares a bond with C a...
- Mon Oct 24, 2016 8:42 am
- Forum: Lewis Structures
- Topic: Question 61 Chapter 3
- Replies: 1
- Views: 454
Re: Question 61 Chapter 3
We'll be talking about molecular shapes soon during the lecture regarding the positions of the bonds and lone pairs that contribute to the final structure. In this case, since there are two lone pairs and 4 bonds, the shape forms an octahedral and the angle between the I and Cl atoms are drawn at a ...
- Sun Oct 23, 2016 5:59 pm
- Forum: Lewis Structures
- Topic: Homework #3.97
- Replies: 2
- Views: 595
Homework #3.97
The question states to draw the lewis structure of P4 in which each P atom is connected to 3 other P atoms. In the textbook answer section, it draws the P4 structure with a diagonal bond between the 4 P atoms. Is there an explanation for the diagonal bonds?
- Sun Oct 23, 2016 5:50 pm
- Forum: Sigma & Pi Bonds
- Topic: Quiz 2 Preparation (Question 1)
- Replies: 2
- Views: 809
Re: Quiz 2 Preparation (Question 1)
Pi bonds are double bonds and Sigma bonds are single bonds - if you draw out that compound, then there will be 12 sigma bonds (it includes the single bond within the double bond), and 1 pi bond
- Fri Sep 30, 2016 10:46 pm
- Forum: Limiting Reactant Calculations
- Topic: Multiple Limiting Reactants? [ENDORSED]
- Replies: 4
- Views: 3975
Re: Multiple Limiting Reactants? [ENDORSED]
I agree as well since limiting reagents determine the amount of the product in the reaction. The concept that two limiting reagents exist in a single-step reaction would be hard to visualize since that would mean both would determine the amount of product - which cannot be as calculations will differ.