## Search found 34 matches

Tue Aug 01, 2017 2:44 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 11.49
Replies: 1
Views: 301

### 11.49

With the last part of this homework problem can someone please explain to me why and how they found those values for [NH^3] and [H^2S]?
Tue Aug 01, 2017 11:26 am
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: 12.55 Part A
Replies: 2
Views: 314

### 12.55 Part A

I am having trouble finding or figuring out the value for the CH^3CO^2- which is the value we need to plug-in in order to find the value of
[H^3O+]? I can post a picture of what I mean, I just know you need to plug in the values to find H^3o+ but I have every other values except that one?
Mon Jul 31, 2017 3:57 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: 12.23
Replies: 1
Views: 346

### 12.23

I need help with 12.23 I do no understand tis problem? Can someone please help and explain it to me? I looked at the solution in the solution manual but I don't see how they get the x^2
Mon Jul 31, 2017 3:44 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: 12.21
Replies: 1
Views: 293

### 12.21

How or where did we get the [OH-] from?
Mon Jul 31, 2017 3:12 pm
Forum: Lewis Acids & Bases
Topic: HW #12.17
Replies: 1
Views: 259

### HW #12.17

What does it mean for an oxide to be amphoteric? What are the characteristics to look for when knowing if it is amphoteric or not?
Mon Jul 31, 2017 3:04 pm
Forum: Lewis Acids & Bases
Topic: HWK 12.13.c
Replies: 2
Views: 496

### Re: HWK 12.13.c

How do you know how to determine whether the lewis structure is a lewis base or acid?
Fri Jul 28, 2017 4:08 pm
Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
Topic: Icebox for Buffers?
Replies: 5
Views: 1246

### Re: Icebox for Buffers?

How would we know when to use the Ice box for the buffers? I am really confused with this, can someone please help me with this
Mon Jul 24, 2017 8:29 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: 11.33
Replies: 4
Views: 622

### Re: 11.33

is that same for why the Kc and Qc had changed? or is that just answering the first part of the question which is why the nmoles converted to moles?
Mon Jul 24, 2017 7:23 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: 11.33
Replies: 4
Views: 622

### 11.33

I am having trouble understanding 11.33, I am confused to how when solving for Qc we are dividing the values by 0.500 and how now the values we are given wen from 0.10 to 1.0 x 10^4? Also, question on why the values of kc changed and how exactly the calculations were done for that to change to 6.9?
Mon Jul 24, 2017 7:18 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Question 11.13
Replies: 3
Views: 470

### Re: Question 11.13

So just to review this both solids, liquids and aqueous are not included in the concentrations?
Mon Jul 24, 2017 7:15 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Qc and Qp
Replies: 2
Views: 1381

### Qc and Qp

Does Qc and Qp always have the values of 0.50? Or does it change upon the problem? How do we know their values?
Mon Jul 24, 2017 3:35 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: 17.37
Replies: 1
Views: 313

### 17.37

For this question on the homework how would I be able to find the number of metal ions in each of the compounds without the
table that we are given, is there a way to solve for this without that?
Mon Jul 24, 2017 3:13 pm
Forum: Naming
Topic: Diaqaua
Replies: 9
Views: 526

### Diaqaua

What does diaqua mean? In problem 17.31 in chapter 17, can someone help me understand this please?
Sat Jul 22, 2017 8:53 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8221
Views: 1434699

### Re: Post All Chemistry Jokes Here

Don't trust atoms, they make up everything.
Sat Jul 22, 2017 8:48 am
Forum: Ionic & Covalent Bonds
Topic: Covalent Bonds (video)
Replies: 6
Views: 577

### Re: Covalent Bonds (video)

Thank you for this video! I was just about to ask about covalent and ionic bonds before I had came across this video and it was very helpful!
Sat Jul 22, 2017 8:47 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Pressure and Volume
Replies: 4
Views: 427

### Re: Pressure and Volume

Does anyone know if any of the end of the section for the chemical equilibrium will be put on the test? I want to know how much of this section of chemical equilibrium will be covered?
Sat Jul 22, 2017 8:45 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Naming Ligands
Replies: 5
Views: 919

### Re: Naming Ligands

I would say stick to memorizing the ligands given in the course reader, do not go looking for other websites because then you
will get confused and I know lavelle will like the ligands that he gave to us not any other ones
Wed Jul 19, 2017 8:49 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: What does Kc tell us?
Replies: 5
Views: 6815

### Re: What does Kc tell us?

Kc stands for the equilibrium constant and then Kp stands for the partial pressure.
Wed Jul 19, 2017 8:48 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands [ENDORSED]
Replies: 2
Views: 606

### Re: Ligands[ENDORSED]

Tetra- means four so I believe tetradentate ligand is that there are ligands that bond with four donor atoms to one central atom to form a coordination complex. And then pent- means five so I believe that the pentadentate ligand binds with five atoms.
Wed Jul 19, 2017 8:45 pm
Forum: Naming
Topic: question
Replies: 2
Views: 456

### Re: question

What exactly is an easy way to remember the life of coordination compounds? Because I know this table will not be given on the
exam so what are easy tricks around it?
Wed Jul 19, 2017 8:43 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizable
Replies: 2
Views: 394

### Re: Polarizable

When it is polarizable it means that there are an equal amount of negative and positive charges of electrons within an object.Because there is a separation in the charge that means that there is not an imbalance in the charges.
Wed Jul 19, 2017 8:41 pm
Forum: Resonance Structures
Topic: Resonance vs. Lewis Structure?
Replies: 9
Views: 1298

### Re: Resonance vs. Lewis Structure?

But how exactly do we know when we are able to have a resonance structure? Like what are the characteristics we should
look for in order to figure that out? or is every lewis structure have a resonance?
Mon Jul 17, 2017 2:18 pm
Forum: Hybridization
Topic: Bond Order
Replies: 4
Views: 1012

### Re: Bond Order

I need help on understanding hybridization!!! Can anyone explain to me the bond order, how do we go about recognizing what bond order is which from a Lewis structure? I am just confused on this whole lecture from today, if anyone can please help me and going over this that would be greatly appreciated
Mon Jul 17, 2017 2:14 pm
Forum: Dipole Moments
Topic: Polar and Non-polar bond
Replies: 8
Views: 1246

### Re: Polar and Non-polar bond

With polar and non-polar bonds, I believe the easiest way to know the difference would be that polar bonds do not cancel and a non-polar must have zero electric dipole moment and bonds with dipoles must cancel. It is usually also easiest to draw out the lewis structure.
Mon Jul 17, 2017 2:12 pm
Forum: Electronegativity
Topic: "Higher" Electron Affinity
Replies: 4
Views: 727

### Re: "Higher" Electron Affinity

How would you know which electron has a higher electron affinity than the other?
Thu Jul 13, 2017 8:32 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: For Exam 1
Replies: 4
Views: 670

### Re: For Exam 1

Exam 1 covers Fundamentals, Ch.1 and Ch.2!
Thu Jul 13, 2017 8:30 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: problem help
Replies: 5
Views: 1217

### Re: problem help

I believe the first thing one should solve for is the uncertainty in position and then next you use what you have to solve the hisenbergs uncertainty principle. Thats how I am trying to go about this problem, so I will try to help you solve it and post up my solutions!
Tue Jul 11, 2017 4:00 pm
Forum: Properties of Light
Topic: Exercise 1.15 (Ch 1 : The Quantum World)
Replies: 4
Views: 423

### Re: Exercise 1.15 (Ch 1 : The Quantum World)

I am still confused to how we go from 0.112 to n^2=3. I am not understanding on how we got the second value of n just from solving of the rydberg equation?
Mon Jul 10, 2017 8:09 am
Forum: Lewis Structures
Topic: Formal Charge
Replies: 5
Views: 671

### Re: Formal Charge

With the formal charge how do we know exactly where it stands in the Lewis structure? And do we just need to see if the compound has a formal charge then it is most likely to be put in the Lewis structure?
Mon Jul 10, 2017 8:07 am
Forum: Empirical & Molecular Formulas
Topic: Empirical and Molecular Formulas
Replies: 3
Views: 387

### Empirical and Molecular Formulas

I am having trouble understanding on how exactly to go from an empirical to a molecular formula and vice versa? I do not exactly understand what we need to know or how we get from one to the other? I went over the notes and the videos but it is just the hardest concept for me. Is anyone willing to b...
Mon Jul 10, 2017 8:05 am
Forum: Electronegativity
Topic: Electron Affinity
Replies: 12
Views: 1386

### Re: Electron Affinity

How should we go about with memorizing or just remembering the trends in the periodic table? Any suggestions? And how can we also go about of remembering the exceptions in the periodic table?
Mon Jul 03, 2017 8:08 am
Forum: Properties of Electrons
Topic: Wave Properties of Electrons Worked Examples
Replies: 1
Views: 258

### Re: Wave Properties of Electrons Worked Examples

We said that the cut off would roughly just go on based on how large the 10^x, what I mean by this is that to the power of x, it could not be any larger than 16 because if we go any larger than that we cannot detect if it were acting as a wavelength because it was too small to detect. So the answer ...
Wed Jun 28, 2017 8:48 pm
Forum: Properties of Electrons
Topic: Tutoring
Replies: 1
Views: 319

### Tutoring

During the summer is there any available tutors that we would be able to contact to help us individually? And is bruin cast available for this summer course?
Wed Jun 28, 2017 8:46 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant [ENDORSED]
Replies: 2
Views: 557

### Limiting Reactant[ENDORSED]

I am having trouble with understanding limiting reactants and the steps that were given in the video module. I understand the first few steps of balancing the equation and conversions. But the trickiest part for me to understand is exactly how do you know which ones to compare which is step 5. For e...