## Search found 39 matches

Sun Jun 10, 2018 11:54 pm
Forum: Calculating the pH of Salt Solutions
Topic: salts & conjugate base
Replies: 1
Views: 238

### salts & conjugate base

Can someone explain and give a thourough example of what is meant by "salts that contain the conjugate base (anion) of a weak acid will raise the pH by removing protons from water and generate -OH."
Sun Jun 10, 2018 11:48 pm
Forum: Calculating the pH of Salt Solutions
Topic: pH of salt solutions
Replies: 2
Views: 592

### pH of salt solutions

Does anyone have any basic steps or simple explanation to determining the pH of a salt solution? Basic example?
Sun Jun 10, 2018 11:45 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Acids and bases
Replies: 3
Views: 327

### Acids and bases

Does anyone have shortcut or tips to determining what acids/bases would be stronger than others?
Sun Jun 03, 2018 11:43 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxidation number
Replies: 4
Views: 279

### Oxidation number

Can anyone explain the steps to finding the oxidation number in coordination compound? Are we going to have to know how to do this for our final?
Sun Jun 03, 2018 11:35 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 2
Views: 212

### Ligands

What is the importance of ligands and in what kind of examples will they appear?
Sun Jun 03, 2018 11:32 pm
Forum: *Molecular Orbital Theory Applied To Transition Metals
Topic: Electron configuration form
Replies: 1
Views: 3443

### Electron configuration form

Can someone explain the difference between regular electrons configurations and orbital electron configurations?
Mon May 28, 2018 1:50 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Molecular orbital energy-level diagram
Replies: 1
Views: 210

### Molecular orbital energy-level diagram

How do you write the configuration of the ground state of the cyanide ion, CN ,
assuming that its is the same as that for CO?
Mon May 28, 2018 1:46 am
Forum: Hybridization
Topic: 4.33
Replies: 1
Views: 109

### 4.33

Can someone explain how to do the problems in 4.33, what steps should we follow?
Mon May 28, 2018 1:43 am
Forum: Determining Molecular Shape (VSEPR)
Topic: lone pairs
Replies: 3
Views: 173

### lone pairs

Do lone pairs determine bond angles? In what way? Examples?
Fri May 18, 2018 2:09 am
Forum: Octet Exceptions
Replies: 2
Views: 224

Can any element have a radical and can any element break the octet rule?
Fri May 18, 2018 2:02 am
Forum: Formal Charge and Oxidation Numbers
Topic: 3.53
Replies: 4
Views: 435

### 3.53

For this problem, we are asked to identify the structure with the lowest energy. Does this mean the structure that has formal charges closest to zero?
Fri May 18, 2018 2:00 am
Forum: Resonance Structures
Topic: 3.47
Replies: 3
Views: 334

### 3.47

This question describes 4 carbon atoms that form a square... this seems to be the only problem described like this. Will we have to know how to draw these and problems like 43?
Sun May 13, 2018 3:16 am
Forum: Lewis Structures
Topic: octect rule
Replies: 4
Views: 286

### octect rule

How do we know when we can break the octet rule? If we are allowed to break it, should we always find a way not to or can we just break it if its faster in helping us draw the lewis structure? Would we penalized?
Sun May 13, 2018 3:11 am
Forum: Lewis Structures
Topic: Lewis Structures
Replies: 4
Views: 302

### Lewis Structures

Does it matter how we draw our lewis structures? For example if its linear or bent? and can you put two of the same molecules together? for example c-o-o-h or would -o-c-o-h be more accurate?
Sun May 13, 2018 3:02 am
Forum: Resonance Structures
Topic: Resonance Structures
Replies: 5
Views: 2379

### Resonance Structures

Will we have to draw all possible resonance structures?
Wed May 09, 2018 4:03 pm
Forum: Ionic & Covalent Bonds
Topic: Midterm Topics [ENDORSED]
Replies: 33
Views: 2680

### Midterm[ENDORSED]

Hello there, I am overthinking everything.. but just to confirm.. our midterm is taking place in CS50 correct? Thanks!
Sun Apr 29, 2018 11:45 pm
Forum: Quantum Numbers and The H-Atom
Topic: Electron Configuration form
Replies: 4
Views: 180

### Electron Configuration form

Will we be told when to write a configuration the longer way or shorter way? for example [NE] vs. 2s2 2p5
Sun Apr 29, 2018 11:42 pm
Forum: Trends in The Periodic Table
Topic: S and d orbitals [ENDORSED]
Replies: 2
Views: 154

### S and d orbitals[ENDORSED]

Why does 3d come after 4s?
Sun Apr 29, 2018 11:33 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: f orbitals
Replies: 3
Views: 178

### f orbitals

If ever, when will we use f orbitals? Examples?
Sun Apr 22, 2018 11:55 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: QM
Replies: 1
Views: 130

### QM

Can anyone give me a basic QM description of atoms? I have a few notes for this but would like one or two clear statements.
Sun Apr 22, 2018 11:51 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Change in momentum
Replies: 3
Views: 162

### Change in momentum

If not given will we always have to us the equation with the greater (>) sign to find the change in momentum? or can we just use p=mv. Are they the same?
Sun Apr 22, 2018 11:47 pm
Forum: DeBroglie Equation
Topic: De Brogile's equation [ENDORSED]
Replies: 4
Views: 318

### De Brogile's equation[ENDORSED]

Can someone explain what Lavelle meant when he said not to use the equation for a photon for questions related to light?
Sun Apr 15, 2018 10:29 pm
Forum: Einstein Equation
Topic: Different equations
Replies: 4
Views: 305

### Different equations

Has anyone come up with any different methods or shortcuts in determining what equations to use for different problems. There have been quite a few during the last two lectures, so I was just wondering what would be useful in remembering.
Sun Apr 15, 2018 10:23 pm
Forum: Photoelectric Effect
Topic: Examples
Replies: 1
Views: 80

### Examples

Can someone provide examples of problems where we would have to take the photoelectric effect into account? And how these problems would be solved?
Sun Apr 15, 2018 10:18 pm
Forum: Properties of Light
Topic: Properties of Light
Replies: 4
Views: 200

### Properties of Light

For exams are we going to have to know the numbers associated with visible light, diameter of an atom, and the human eye?
Sun Apr 08, 2018 11:57 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant Problems
Replies: 1
Views: 126

### Limiting Reactant Problems

In Lavelle's last Friday example, can someone explain in simpler steps how to solve the last part (finding the maximum yield)?
Sun Apr 08, 2018 11:50 pm
Forum: Empirical & Molecular Formulas
Topic: Formula steps
Replies: 4
Views: 277

### Formula steps

Does anyone have any tricks to remembering the steps to find the empirical formula vs the molecular formula?
Sun Apr 08, 2018 11:40 pm
Forum: Significant Figures
Topic: Sig Figs [ENDORSED]
Replies: 2
Views: 174

### Sig Figs[ENDORSED]

In an exam if our sig figs are incorrect or off by one or two decimal places will points be deducted?
Sun Nov 12, 2017 3:14 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Bond Angles
Replies: 8
Views: 649

### Bond Angles

On future exams, will we have to find bond angles and is so, what steps would we show for credit?
Sun Nov 12, 2017 3:09 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular shapes
Replies: 2
Views: 91

### Molecular shapes

What are the major differences between the molecular shapes of nonpolar molecules and polar molecules?
Sun Nov 05, 2017 11:53 pm
Forum: Resonance Structures
Topic: Resonance structure and formal charges
Replies: 2
Views: 277

### Resonance structure and formal charges

Does anyone have a simpler method or clear trick to easily determining the dominant resonance structure of an ion by calculating the formal charges on the atom? or simply something that reminds them of the steps to achieving this?
Sun Nov 05, 2017 11:39 pm
Forum: Ionic & Covalent Bonds
Topic: Bond energies
Replies: 1
Views: 170

### Bond energies

I was reading the book, specifically about average bond dissociation energies (kJ-mol"1) and was wondering if anyone could please give me a break down of what there numbers really mean and when we would have to apply them. Thank you.
Sun Oct 29, 2017 11:55 pm
Forum: Octet Exceptions
Replies: 2
Views: 309

Simply definition of radicals and biradicals and the difference between them? What do we have to know about them and what connections does it have with finding Lewis structures?
Sun Oct 29, 2017 11:29 pm
Forum: Octet Exceptions
Topic: Octet Rule [ENDORSED]
Replies: 1
Views: 1858

### Octet Rule[ENDORSED]

Can someone please explain the octet rule more in depth and give examples of when it should be applied? Thanks.
Sun Oct 22, 2017 12:49 am
Forum: *Shrodinger Equation
Topic: examples... [ENDORSED]
Replies: 1
Views: 226

### examples...[ENDORSED]

Can anyone please provide me with a simple example of when/how to use the Schrödinger equation?
Sun Oct 22, 2017 12:41 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: ORBITALS, SHELLS ETC. [ENDORSED]
Replies: 6
Views: 496

### ORBITALS, SHELLS ETC.[ENDORSED]

What specifically would we have to know for exams (in relation to what we have learned in the past two lectures)? or what will be given?
Sun Oct 15, 2017 11:54 pm
Forum: Trends in The Periodic Table
Topic: ionization energy
Replies: 1
Views: 176

### ionization energy

Why is the ionization energy for oxygen lower than that of either nitrogen or fluorine? (In straight and simple terms)
Sun Oct 15, 2017 11:27 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Ground state vs excited state
Replies: 3
Views: 340

### Ground state vs excited state

Can someone please explain how I can figure out if an electron configuration represents the excited state or the ground state? (Relates to problem 29).
Fri Oct 06, 2017 1:37 am
Forum: Balancing Chemical Reactions
Topic: L35
Replies: 2
Views: 346

### L35

Hi there, I was just wondering if someone could give me some basic steps or guidance to solve problem L35. "Sodium bromide, NaBr, which is used to produce AgBr for use in photographic film, can itself be prepared as follows... What mass of iron, in kilograms, is needed to produce 2.50t of NaBr?...