Search found 20 matches
Search found 20 matches • Page 1 of 1
- Sun Dec 10, 2017 12:20 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Endothermic v. Exothermic Reactions
- Replies: 9
- Views: 902
In an endothermic reaction, heat is absorbed and can therefore be thought of as basically a reactant. Therefore increasing the temp would cause the reaction to favor the products. Decreasing the temp would cause the rxn to favor the reactants. For exothermic reactions, heat is released. Therefore he...
- Sat Dec 09, 2017 3:14 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Practice Test Fall 2017 [ENDORSED]
- Replies: 19
- Views: 2088
On the back of the Practice Midterm, I was not sure how to do question 2. Its a 2 step reaction that produces hydrogen from methane and water. I got the correct answer by solving for the limiting reactant (CH4) of the first reaction and using that to solve for the amount of H2 produced in the first ...
The ligands should be in alpabetical order according to their names, ignoring the prefixes (bi, tri, tetra, etc.). HOWEVER, when you use the other prefixes, (Bis, tris, tetris, etc) you order those (and only those) in alphabetical order according to all the prefixes.
They are meant to be in alphabetical order, ignoring the prefixes. However, I heard in a study session that you should take into account the prefixes bis, tris, etc in the alphabetical order. Is this true?
- Thu Nov 30, 2017 1:23 pm
- Forum: Student Social/Study Group
- Topic: Naming Complexes
- Replies: 6
- Views: 988
it applies to dien and edta the same was as en because they all contain prefixes (di, tri, etc). However it would not apply to oxo because it does not have a prefix.
- Thu Nov 30, 2017 1:10 pm
- Forum: Naming
- Topic: Iron v ferrate in coordination compound naming
- Replies: 8
- Views: 1505
are there any other elements where the latin name is different from the name we know, other than iron?
Its less that the radical goes to the least electronegative ion, and more that the MOST electronegative atom is going to attract the maximum amount of electrons possible, which for those that obey the octet is 8.
- Mon Nov 13, 2017 9:34 am
- Forum: Lewis Structures
- Topic: Bond Lengths [ENDORSED]
- Replies: 3
- Views: 209
There was a question that asked us to compare the bond lengths of different molecules. In part a it had us compare a single to double to triple bond. However, in part b, it had us compare a molecule that had 1 single bond and one double bond, and a molecule that had 2 single bonds and one double bon...
- Mon Oct 30, 2017 1:35 am
- Forum: Trends in The Periodic Table
- Topic: Exceptions to trends [ENDORSED]
- Replies: 6
- Views: 993
In discussion, I became a bit confused about the exceptions to the trends the relative E.A, I.E, and radii as you move down and across the periodic table. For example, group 15 has a higher ionization level than group 16? Can someone please clarify if this exception applies to all 3 of these trends?
- Mon Oct 23, 2017 12:49 pm
- Forum: Properties of Electrons
- Topic: Rydberg Equation [ENDORSED]
- Replies: 6
- Views: 411
This question is largely why Lavelle would prefer we use the equation E = -hR/n^2 and couple it with the equation ΔE=Efinal-Einitial. This way you never have to be concerned about whether or not to use the higher energy level. You only have to know which energy level it started at (initial) and whic...
- Mon Oct 23, 2017 12:40 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: P-Orbital
- Replies: 5
- Views: 299
For the P-orbital, we use the subscripts x,y, and z. In class, he said something about how these only work if we explicitly define each level as x, y, and z. Does this mean we can use other symbols instead of these to define the different sets of electrons?
- Sun Oct 15, 2017 8:04 pm
- Forum: Properties of Light
- Topic: Fig. 1.7 [ENDORSED]
- Replies: 1
- Views: 145
In section 1.2, it states that "As a light ray passes an electron, its electric field pushes the electron first in one direction and then pulls in the opposite direction" creating the oscillating field shown in 1.7. My question is why would the electric field first push and then pull? Why ...
- Thu Oct 05, 2017 8:38 pm
- Forum: Significant Figures
- Topic: Sig Figs- Addition and Subtraction [ENDORSED]
- Replies: 4
- Views: 354
I believe that that section is simply proposing a trick to facilitate counting sig figs when you are only dealing with numbers with decimal places, ex. .10 + .024 = .12. However when you are adding a whole number to a decimal, 12 + .123, you can use this rule, with your answer thus being rounded to ...
- Thu Oct 05, 2017 8:24 pm
- Forum: Limiting Reactant Calculations
- Topic: M. 15 Fundamentals
- Replies: 4
- Views: 295
Here is the problem: Aluminum metal reacts with chlorine gas to produce aluminum chloride. In one preparation, 255g of aluminum is placed in a container holding 535 g of chlorine gas. After reaction ceases, it is found that 300g of aluminum chloride has been produced. (a) Write the balanced equation...