Search found 64 matches

by Kiara1F
Sat Mar 18, 2017 5:41 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Winter 2016 Final Exam Q2A [ENDORSED]
Replies: 7
Views: 790

Re: Winter 2016 Final Exam Q2A [ENDORSED]

why is there an x^2 on the bottom?
Is it because there are 2 reactants?
It just threw me off because I was thinking in terms of only squaring the number if they had coefficients in front of them but they don't. But there are 2 sets of reactants....
by Kiara1F
Sat Mar 18, 2017 2:50 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Midterm 2013 "Stochiometric amount"?
Replies: 1
Views: 325

Midterm 2013 "Stochiometric amount"?

How does one find the "stoichiometric amount" of a particular gas?
by Kiara1F
Sat Mar 18, 2017 9:33 am
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Can you start anywhere in chairs? Diaxial strain?
Replies: 1
Views: 410

Can you start anywhere in chairs? Diaxial strain?

Can someone explain the explanation for this chair? What does it mean to limit 1,3 diaxial strain? Why didn't the solution just explain that the biggest substituent is equatorial? And why did the positioning start on that particular equatorial area instead of the one above where it would be (axial u...
by Kiara1F
Sat Mar 18, 2017 9:15 am
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Can you start anywhere in chairs? Diaxial strain?
Replies: 2
Views: 466

Can you start anywhere in chairs? Diaxial strain?

Can someone explain the explanation for this chair? What does it mean to limit 1,3 diaxial strain? Why didn't the solution just explain that the biggest substituent is equatorial? And why did the positioning start on that particular equatorial area instead of the one above where it would be (axial u...
by Kiara1F
Sat Mar 18, 2017 12:00 am
Forum: *Amines
Topic: 2010 W Final Q7E ethyl before methyl?
Replies: 1
Views: 432

2010 W Final Q7E ethyl before methyl?

Q7E. give IUPAC name of methyl ethyl amine

Answer: N- methylethanamine

Why isn;t the answer N-ethylmethanamine ( where the e in ethyle comes before the m in methyl in the name prioritization?)
Would N-ethylmethanamine be wrong?
by Kiara1F
Fri Mar 17, 2017 9:29 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: 2010 Q4B How to get the Q
Replies: 1
Views: 254

2010 Q4B How to get the Q

My particular question : how did they come up with Q? I know Q is product/ reactant HA --> H+ A- But in the problem it says " because in a buffer system (A ) = (HA) we can write Q =(H+) Why is this? Problem for reference: "When a PH meter was standardized with a boric acid- borate buffer w...
by Kiara1F
Fri Mar 17, 2017 7:56 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: (W 2010 Final )Which requires more heat?
Replies: 2
Views: 324

(W 2010 Final )Which requires more heat?

Hey so I have a question regarding problem number 1B on the Winter 2010 Final "On heating the following pairs from 10 to 20 Celsius, which requires more heat: 1kg water or 1kg copper ? Answer: 1kg of water - why is it water and not copper? How dow we tell? Does atomic mass have anything to do w...
by Kiara1F
Sun Mar 05, 2017 5:54 pm
Forum: *Cycloalkenes
Topic: Help with where to start counting
Replies: 2
Views: 280

Re: Help with where to start counting

Okay thank you so much! This is clears it up so much
by Kiara1F
Sun Mar 05, 2017 10:45 am
Forum: *Cycloalkenes
Topic: Help with where to start counting
Replies: 2
Views: 280

Help with where to start counting

Picture attached Why cant we start at the double bond all the way to left for the attached problem? If we did the isopropyl would be at the 5 position giving it a lower count that the solutions which is a 6. Is it because the other bond has a methyl group and that takes priority when deciding where ...
by Kiara1F
Fri Mar 03, 2017 1:45 pm
Forum: *Free Energy of Activation vs Activation Energy
Topic: 4(36) Why z Gibbs Activation always + for reactions
Replies: 1
Views: 262

4(36) Why z Gibbs Activation always + for reactions

Can someone explain problem 4(36) in the Intro to Organic Chem book... Why is the standard Gibbs free energy of activation always a positive value?
I thought - value was spontaneous.. and therefore favorable ( or does that have nothing to do with this?)
by Kiara1F
Fri Mar 03, 2017 1:15 pm
Forum: *Alkenes
Topic: how to name double bond problem #21 c
Replies: 1
Views: 210

how to name double bond problem #21 c

Hey , I have a question about whether my answer is correct The problem 21c is attached my answer: 3 isopropyl-1,2 dimethyl - 1,4 cyclohexene Book solution: 3 isopropyl- 1,2 dimethylecyclohexa- 1,4 diene Can you knot write it how I wrote it? *Can someone give me a run down on how to write the positio...
by Kiara1F
Thu Mar 02, 2017 4:59 pm
Forum: *Alkenes
Topic: Does order matter in Line structure? [ENDORSED]
Replies: 4
Views: 504

Re: Does order matter in Line structure? [ENDORSED]

(looking at 12c)
by Kiara1F
Thu Mar 02, 2017 4:58 pm
Forum: *Alkenes
Topic: Does order matter in Line structure? [ENDORSED]
Replies: 4
Views: 504

Does order matter in Line structure? [ENDORSED]

Im working on some of the problems and when it gives you the molecular formula does it matter which way you start the line structure? Some problems like the one attached will start the carbon lines in order of the formula, others will show the triple bond first even though in the molecular formula t...
by Kiara1F
Mon Feb 27, 2017 10:33 am
Forum: *Complex Reaction Coordinate Diagrams
Topic: Lewis structure and Shape Question
Replies: 1
Views: 598

Lewis structure and Shape Question

I have a question regarding the Lewis structure - homework problem 4(25) Write Lewis structure and determine if its polar or nonpolar CH2Cl2 why is it that the solutions has it written with C as central atom and Cl at the bottom and the other Cl to the left of it with the H to the right and the othe...
by Kiara1F
Mon Feb 20, 2017 4:45 pm
Forum: Zero Order Reactions
Topic: 15(25) part c (where does negative sign go?)
Replies: 1
Views: 247

15(25) part c (where does negative sign go?)

in solving for the time in takes for the concentration of N2O5 to decrease from 0.0567 to 0.0135M ( in first order with the rate given)

We are to use the following equation according to the solution manual : ln [A]not/ [A]t = kt

Why isn't the kt --> " -kt"
by Kiara1F
Mon Feb 20, 2017 2:48 pm
Forum: Experimental Details
Topic: HW 15(17)
Replies: 2
Views: 480

HW 15(17)

when trying to solve for theorder of the third reactant C, we see that the exponent is 0 - sice its 0 does that make it independent of the rate and therefore not included? or should we still include it and just put 0 so that it is known?
by Kiara1F
Wed Feb 08, 2017 4:27 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Order of Species in balanced equation (matters?)
Replies: 1
Views: 192

Order of Species in balanced equation (matters?)

So for question 14.11 part (b)
We are writing balanced equations from a Galvanic cell

My answer is Cl2 +H2 --> 2Cl^- +2H^+

The solutions answer is Cl2 +H2 --> 2H^+ +2Cl^-

Does the order of the species matter on tests or in general?
by Kiara1F
Tue Jan 31, 2017 11:39 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 13715

Re: Quiz 1 Preparation Answers

For number 3, what equation do we use since there seems to be a change in pressure? I can't seem to get the answer posted here by any method I've tried. Thanks. Use w=-nRT ln V2/V1 So then you'd get -(2.00 mol)(8.314 J/K mol)(300 K)(ln 18.00/6.00) to get -5480 J or -5.48 kJ. how do you then find th...
by Kiara1F
Wed Jan 25, 2017 5:06 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Why is the oxygen (1/2)02instead of 02?
Replies: 2
Views: 440

Why is the oxygen (1/2)02instead of 02?

"Use the data in Table 9.3 or Appendix 2A to calculate the standard reaction entropy for each of the following reactions at 25 degrees Celsius. Fro each reaction, interpret the sign and magnitude of the reaction entropy. (a) The formation of 1.00 mol H2O(l) from the elements in their most stabl...
by Kiara1F
Tue Jan 24, 2017 10:17 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Help on Example Problem
Replies: 3
Views: 253

Re: Help on Example Problem

Basically.. is qrev (reversible) the same as the enthalpy?
by Kiara1F
Tue Jan 24, 2017 10:11 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Help on Example Problem
Replies: 3
Views: 253

Re: Help on Example Problem

Are we to use a specific heat capacity for ice.. Im not understanding how they got -0.18 J/K
by Kiara1F
Tue Jan 24, 2017 8:42 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Help on Example Problem
Replies: 3
Views: 253

Help on Example Problem

Can anyone explain / work through the following problem?

Calculate the change in entropy of a large block of ice when a 50 J of energy is removed reversibly from it as heat at 0 Celsius in a freezer
by Kiara1F
Fri Jan 20, 2017 12:12 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 2015 Practice Workbook question: Calc Delta H
Replies: 1
Views: 507

2015 Practice Workbook question: Calc Delta H

If anyone can post a picture of their work for this problem it would be greatly appreciated. I feel like its simple but I am not understanding one of the steps Problem 4 (2015 practice workbook) The chemical reaction involved is the oxidation of hydroquinone by hydrogen peroxide to produce quinine a...
by Kiara1F
Thu Jan 19, 2017 10:09 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Calculating work (Reversible & Isothermal)
Replies: 1
Views: 208

Calculating work (Reversible & Isothermal)

In the study guide it lists 2 equations for calculating work for an ideal gas when it is said to be a reversible isothermal reaction. I understand the firs one but why is is the second equation regarding pressure - have the P Initial over Pfinal instead on Pfinal over Pinitial like the first equatio...
by Kiara1F
Sun Jan 15, 2017 11:07 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Reaction Enthalpies
Replies: 1
Views: 145

Re: Reaction Enthalpies

Problems listed in the syllabus ( solutions manual really comes in handy), PLF sessions ( they give practice problem sheets), end of the course reader midterm questions
by Kiara1F
Wed Jul 27, 2016 1:02 pm
Forum: Biological Examples
Topic: Fe and proteins
Replies: 6
Views: 684

Fe and proteins

Hemoglobin and myoglobin are considered proteins correct?
by Kiara1F
Wed Jul 27, 2016 1:01 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Strength
Replies: 1
Views: 356

Strength

When there is a longer bond the bond is weaker.. so does that mean the acid is stronger because the bond can be broken more easily? i think I wrote the opposite.. to where because the bond was weaker the acid was weaker ....:/
by Kiara1F
Mon Jul 25, 2016 7:49 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Ka from Molarity?
Replies: 1
Views: 1031

Ka from Molarity?

Can one calculate the Ka value if the problem only gives the molarity of the solution? If so can anyone walk through it?
by Kiara1F
Mon Jul 25, 2016 5:54 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Difference between KA and PKA
Replies: 4
Views: 912

Re: Difference between KA and PKA

what is pKA though? I know that Ka is the acidity constant...
by Kiara1F
Mon Jul 25, 2016 4:44 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Ch.12 #59b [ENDORSED]
Replies: 2
Views: 342

Re: Ch.12 #59b [ENDORSED]

Are they giving us the Kb? Because they don't in the problem but in the solutions manuel the KB pops up. Are they calculating it or are we just assuming that its given?
by Kiara1F
Mon Jul 25, 2016 4:21 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Difference between KA and PKA
Replies: 4
Views: 912

Difference between KA and PKA

What is the difference between pKA and the KA
by Kiara1F
Mon Jul 25, 2016 3:52 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Calculating Ka and PKA hw 12(57) [ENDORSED]
Replies: 1
Views: 250

Calculating Ka and PKA hw 12(57) [ENDORSED]

For this particular problem i don't understand how they got .10-0.06 in the denominator. Shouldn't it just be .10 since thats the reactant? Did they do an equilibrium table?
The problem:
: When t he pH of of.10M HCLO2was measured it was found to have a pH of 1.2. What are the KA and PKA values?"
by Kiara1F
Mon Jul 25, 2016 12:12 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Why is HCLO2 stronger than BRO2?
Replies: 2
Views: 1179

Why is HCLO2 stronger than BRO2?

I dont understand why HCL is a stronger acid than HF and HCLO2 is a stronger acid than HBrO2. HCL has a weaker bond than HF so it would be able to release a proton easier .. so I understand that one but doesnt HCLO2 have a longer bond than HBrO2? If it was between HCL and HBr which would be stronger?
by Kiara1F
Fri Jul 22, 2016 3:31 pm
Forum: Amphoteric Compounds
Topic: Bi2O3 [ENDORSED]
Replies: 1
Views: 365

Bi2O3 [ENDORSED]

Isn't Bi a metal? Why is it amphoteric and not basic?
by Kiara1F
Fri Jul 22, 2016 3:06 pm
Forum: Conjugate Acids & Bases
Topic: Conjugate bases and acids homework 12(11) [ENDORSED]
Replies: 1
Views: 243

Conjugate bases and acids homework 12(11) [ENDORSED]

a) HCO3-

For question A in particular the answer is as listed:
Hco3-(acid) and CO3 2-(base), H20(base) and H30+(acid)

Is the H20 the actual able or is it the conjugate base? Or is the CO3 2- the conjugate base?
by Kiara1F
Wed Jul 20, 2016 4:19 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Bond Order
Replies: 2
Views: 319

Bond Order

The smaller the value of a bond order the stringer it is right? Or is it the one with the lower number for the bond order is stronger?
by Kiara1F
Mon Jul 18, 2016 8:57 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: chemical Equilibrium [ENDORSED]
Replies: 2
Views: 583

Re: chemical Equilibrium [ENDORSED]

In finding Q one can always tell the direction of the reaction
by Kiara1F
Mon Jul 18, 2016 2:02 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: "More thermodynamically stable"..?
Replies: 1
Views: 167

"More thermodynamically stable"..?

Homework problem11(45) part c asks us to find the equilibrium compositions of CL2 and F2 rxns.. But then part c asks which one is more thermodynamically stable.. The answer key says its F2 as the equilibrium constant is larger .. Can anyone explain why this is? It mentions something about dissociati...
by Kiara1F
Thu Jul 14, 2016 4:36 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: "Stating hybridization" vs "Hybridized orbitals"
Replies: 1
Views: 284

"Stating hybridization" vs "Hybridized orbitals"

So for homework problem 4.33 it says to state the hybridization of the boldface atom and for 4.35 it said to identify the hybridized orbitals. I just need clarification.. For stating the hybridization its basically just the number of atoms around it..? And identifying the hybrid orbitals include the...
by Kiara1F
Thu Jul 14, 2016 4:13 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: "Largest dipole moment" hw 4.29 [ENDORSED]
Replies: 1
Views: 409

"Largest dipole moment" hw 4.29 [ENDORSED]

Screen Shot 2016-07-14 at 4.11.53 PM.png

Can anyone explain why one is the largest dipole moment and not 2. 2 has an angle between that is about 120 degrees doesn't this cover more area to cancel than the dipole moment in one that only has an angle about 60?
by Kiara1F
Thu Jul 14, 2016 3:57 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: hw 4.25(d) [ENDORSED]
Replies: 2
Views: 400

hw 4.25(d) [ENDORSED]

Why isn't SF4 non polar? In the book it says its polar. When we do the lewis structure there is a lone pair on the S .. is this why the dipole moments don't cancel all out?
by Kiara1F
Tue Jul 12, 2016 8:37 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: HW 21d ( "Slightly less bond angle")
Replies: 1
Views: 285

HW 21d ( "Slightly less bond angle")

If we have a tribunal pyramidal shape because of a lone pair doesn't the bond become slightly less than 109.5? One problem in the homework, number 21 d says the angle is 107... is this just more precise? What should we put on the exams?
by Kiara1F
Tue Jul 12, 2016 8:26 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Homework Question 4.9
Replies: 2
Views: 270

Re: Homework Question 4.9

So AX3E2 is T shaped and AX3E is trigonal pyramidal
by Kiara1F
Tue Jul 12, 2016 8:23 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Homework #4.9 [ENDORSED]
Replies: 4
Views: 426

Re: Homework #4.9 [ENDORSED]

I believe so.. those are thinly angles. I don't think they would ask for the angle going across with the CL I CL so it would be the L shaped angle
by Kiara1F
Tue Jul 12, 2016 8:20 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: lone pairs causing shape to be bent
Replies: 2
Views: 337

lone pairs causing shape to be bent

The Professor mentioned it in class..... but what is it exactly that makes the shape become bent when the lone pair is added to the top of the central atom? Is it the electron repulsion... and if so repulsion with the other bonds.. or?
by Kiara1F
Thu Jun 30, 2016 12:49 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Fall 2014 Quiz 1 Preparation
Replies: 3
Views: 441

Re: Fall 2014 Quiz 1 Preparation

Which constant is the2.18
by Kiara1F
Wed Jun 29, 2016 6:50 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Quiz prep number 5 [ENDORSED]
Replies: 1
Views: 319

Quiz prep number 5 [ENDORSED]

How many mole of CO2 is produced when 1 Kg of CaCo3 is used to neutralize an acid spill? The equation for the reactant 1atm and 25 celsius is CaCO3 + H2SO4--> CaSO4 + CO2 + H2O I am confused with the "Kg" are we supposed covert everything to Kg? if we did it would no longer be a representa...
by Kiara1F
Tue Jun 28, 2016 4:40 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: How many electrons canthe quantum numbers in an atom? [ENDORSED]
Replies: 2
Views: 482

Re: How many electrons canthe quantum numbers in an atom? [ENDORSED]

The question is: How many electrons can have the following quantum numbers in an atom? (a)n=2, l=1 (b)n=4,l=2, ml=-2 (c)n=2 (d) n=3,l=2, ml=+1 Please give me a basic run through of how to solve this problem by: carlacruzm in 1C Summer 2016 Quick explanation: (a) n=2 means its in the 2nd energy leve...
by Kiara1F
Fri Jun 24, 2016 12:15 pm
Forum: Properties of Light
Topic: Exercise 1.3 ( explanation needed) [ENDORSED]
Replies: 1
Views: 244

Exercise 1.3 ( explanation needed) [ENDORSED]

image.jpeg
What is underlined in red
image.jpeg
What is underlined in red
Can anyone explain the symbol/ correlation of whats underlined in red in the attachment
by Kiara1F
Fri Jun 24, 2016 11:44 am
Forum: Properties of Electrons
Topic: Orbitals [ENDORSED]
Replies: 3
Views: 394

Orbitals [ENDORSED]

In lecture it was mentioned that after the f orbital ..(it was some type of trick question) that there was another orbital -- can anyone explain this?

I think he called it a g-orbital or state..? Does this mean that the electrons just end up back in the ground energy state?
by Kiara1F
Tue Mar 01, 2016 11:32 pm
Forum: *Alkenes
Topic: Confused! Alkene example
Replies: 1
Views: 275

Confused! Alkene example

In the attached photo I have the example.

Why is the methyl number 2 when she numbered the double bond (substituent) number 2?

Wouldn't it be 2methyl- 1,2 pentadiene as there are two double bonds?

Screen Shot 2016-03-01 at 11.27.32 PM.png
by Kiara1F
Tue Mar 01, 2016 6:01 pm
Forum: *Alkenes
Topic: Naming Cyclo alkenes
Replies: 1
Views: 301

Naming Cyclo alkenes

I have a figure that is an alkene. It is a pentagon because of the 5 carbons and has 2 double bonds on 1st and 3rd carbon. Theres one methyl group coming from 5th carbon. Answer: "5-methylcyclopenta-1,3 diene"\ * Could I write it "5-methyl-1,3cyclopentene" and stile correct or no?
by Kiara1F
Sat Feb 27, 2016 2:53 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Aromaticity
Replies: 1
Views: 243

Aromaticity

Friedal Craft alkylation gives us a way to alkylate benzene molecules without destroying their "aromatically"- what exactly is "aromaticity"?
by Kiara1F
Wed Feb 17, 2016 1:28 pm
Forum: Zero Order Reactions
Topic: Units and Orders
Replies: 2
Views: 327

Units and Orders

besides the units of K are there any other key words in the problem that will allow us to infer the order of the reaction? Or will the problem on the quizzes tell us the reaction orders ?
by Kiara1F
Tue Jan 26, 2016 10:58 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Calculating Enthalpy
Replies: 2
Views: 274

Calculating Enthalpy

In the course reader an in my notes, to calculate the enthalpy of reaction, it subtracts the enthalpy of the bonds formed from that of the bonds broken (reactants - products). But on the chapter 8 homework problem number 37: "vaporization of .579 mol CH4 requires 4.76kj of heat.. what is the en...
by Kiara1F
Fri Dec 04, 2015 12:36 am
Forum: Lewis Acids & Bases
Topic: acid and base chem video
Replies: 1
Views: 2617

acid and base chem video

I been trying to post this since last week
by Kiara1F
Sat Nov 21, 2015 10:59 pm
Forum: Amphoteric Compounds
Topic: polyprotic
Replies: 1
Views: 303

polyprotic

I'm still slightly confused about polypro tic acid and bases. Can anyone provide a brief precise explanation?
by Kiara1F
Sat Nov 14, 2015 3:49 pm
Forum: Ideal Gases
Topic: P=nRT
Replies: 3
Views: 425

Re: P=nRT

PV=nRT in the context of this equation
by Kiara1F
Sat Nov 14, 2015 3:49 pm
Forum: Ideal Gases
Topic: P=nRT
Replies: 3
Views: 425

P=nRT

How is R determined? Is it a particular constant?
I was watching a video o you tubing and there were different listings of R, but I'm not sure where he got it from.

R= 8.3145 m^3Pa/mol *K

R=8.3145 L* K*Pa/ mol*K

R=.082 L*atm/mol*K
by Kiara1F
Mon Nov 09, 2015 6:45 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Chelates
Replies: 2
Views: 311

Re: Chelates

Production of some chelates release toxic chemicals such as cyanides to the environment. It is said that there are new types of chelates that manipulate or "sequester" d block metals and bind and remove them from the solution are actually helpful to the environment. Polydentate ligands can...
by Kiara1F
Sun Oct 25, 2015 5:59 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: formal charge
Replies: 3
Views: 397

formal charge

For the best structure does the central atom have to have a formal charge of 0?
by Kiara1F
Sun Oct 11, 2015 1:54 pm
Forum: Properties of Electrons
Topic: How do I know which formula to use to find photons?
Replies: 2
Views: 531

Re: How do I know which formula to use to find photons?

Wow, Grace I forgot about the combination of the two equations. That's very convenient and so helpful. I used the light equation to find the frequency c= lambda/ nu ..and then I solved for nu (the frequency) to get the new equation : nu=speed of light/lambda. Once I have the frequency I then use the...

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