Search found 20 matches

by alyssawhite1L
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

Re: Endothermic v. Exothermic Reactions

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...
by alyssawhite1L
Sat Dec 09, 2017 3:14 pm
Forum: Administrative Questions and Class Announcements
Topic: Practice Test Fall 2017 [ENDORSED]
Replies: 19
Views: 2088

Re: Practice Test Fall 2017 [ENDORSED]

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 ...
by alyssawhite1L
Thu Nov 30, 2017 1:35 pm
Forum: Naming
Topic: 17.31 c and d confusion
Replies: 5
Views: 352

Re: 17.31 c and d confusion

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.
by alyssawhite1L
Thu Nov 30, 2017 1:26 pm
Forum: Naming
Topic: Order of Ligands
Replies: 8
Views: 373

Re: Order of Ligands

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?
by alyssawhite1L
Thu Nov 30, 2017 1:23 pm
Forum: Student Social/Study Group
Topic: Naming Complexes
Replies: 6
Views: 988

Re: Naming Complexes

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.
by alyssawhite1L
Thu Nov 30, 2017 1:10 pm
Forum: Naming
Topic: Iron v ferrate in coordination compound naming
Replies: 8
Views: 1505

Re: Iron v ferrate in coordination compound naming

are there any other elements where the latin name is different from the name we know, other than iron?
by alyssawhite1L
Mon Nov 20, 2017 4:22 am
Forum: Octet Exceptions
Topic: Radical Question
Replies: 4
Views: 315

Re: Radical Question

so therefore a full set or full octet needs 4 pairs of electrons. so a full set could never contain a radical
by alyssawhite1L
Mon Nov 20, 2017 4:15 am
Forum: Octet Exceptions
Topic: Radical Question
Replies: 4
Views: 315

Re: Radical Question

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.
by alyssawhite1L
Mon Nov 13, 2017 9:34 am
Forum: Lewis Structures
Topic: Bond Lengths [ENDORSED]
Replies: 3
Views: 209

Bond Lengths [ENDORSED]

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...
by alyssawhite1L
Mon Nov 13, 2017 9:29 am
Forum: Lewis Structures
Topic: Radicals
Replies: 7
Views: 313

Re: Radicals

How do you know which atom in a molecule will have the radical, for example like in ClO
by alyssawhite1L
Wed Nov 01, 2017 7:45 pm
Forum: Trends in The Periodic Table
Topic: Exceptions to trends [ENDORSED]
Replies: 6
Views: 993

Re: Exceptions to trends [ENDORSED]

Or even better, what are the exceptions for EA and atomic radii?
by alyssawhite1L
Wed Nov 01, 2017 7:13 pm
Forum: Trends in The Periodic Table
Topic: Exceptions to trends [ENDORSED]
Replies: 6
Views: 993

Re: Exceptions to trends [ENDORSED]

So to clarify, the group 15/16 exception only applies to the trends of IE, and not EA and Radii? Why is this?
by alyssawhite1L
Mon Oct 30, 2017 1:36 am
Forum: Trends in The Periodic Table
Topic: Exceptions to trends [ENDORSED]
Replies: 6
Views: 993

Re: Exceptions to trends [ENDORSED]

It would also be helpful if someone could explain why these exceptions exist for each trend it applies to
by alyssawhite1L
Mon Oct 30, 2017 1:35 am
Forum: Trends in The Periodic Table
Topic: Exceptions to trends [ENDORSED]
Replies: 6
Views: 993

Exceptions to trends [ENDORSED]

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?
by alyssawhite1L
Mon Oct 23, 2017 12:49 pm
Forum: Properties of Electrons
Topic: Rydberg Equation [ENDORSED]
Replies: 6
Views: 411

Re: Rydberg Equation [ENDORSED]

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...
by alyssawhite1L
Mon Oct 23, 2017 12:40 pm
Forum: Quantum Numbers and The H-Atom
Topic: P-Orbital
Replies: 5
Views: 299

P-Orbital

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?
by alyssawhite1L
Sun Oct 15, 2017 8:15 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals as Probability
Replies: 2
Views: 178

Orbitals as Probability

In discussion, we talked about how each orbital shape is representative of probability. Can someone please explain what this means?
by alyssawhite1L
Sun Oct 15, 2017 8:04 pm
Forum: Properties of Light
Topic: Fig. 1.7 [ENDORSED]
Replies: 1
Views: 145

Fig. 1.7 [ENDORSED]

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 ...
by alyssawhite1L
Thu Oct 05, 2017 8:38 pm
Forum: Significant Figures
Topic: Sig Figs- Addition and Subtraction [ENDORSED]
Replies: 4
Views: 354

Re: Sig Figs- Addition and Subtraction [ENDORSED]

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 ...
by alyssawhite1L
Thu Oct 05, 2017 8:24 pm
Forum: Limiting Reactant Calculations
Topic: M. 15 Fundamentals
Replies: 4
Views: 295

M. 15 Fundamentals

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...

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