Search found 31 matches
- Sat Dec 07, 2019 11:17 pm
- Forum: Bronsted Acids & Bases
- Topic: List of Strong/Weak Acids/Bases
- Replies: 2
- Views: 150
Re: List of Strong/Weak Acids/Bases
The main strong acids are hydrochloric acid (HCl), hydrobromic acid (HBr), hyroiodic acid (HI), chloric acid (HClO3), perchloric acid (HClO4), nitric acid (HNO3), and sulfuric acid (H2SO4).
Re: 9C.5
The question asks whether (CO_3)^2- is polydentate, and if so what is the maximum number of places the ligand can bind to a metal center.
9C.5
For part (b) of this question, I understand the lewis structure has one double bonded oxygen (2 lone pairs) and 2 single bonded oxygens (3 lone pairs). Why can only the single bonded oxygens bind to a metal center? I initially guessed that each oxygen could bind to a metal because they all have lone...
- Wed Dec 04, 2019 9:28 pm
- Forum: Naming
- Topic: Homework Problem 9C 3a
- Replies: 2
- Views: 75
Re: Homework Problem 9C 3a
For your second question, I believe that cyanido is just a new name convention. Professor Lavelle posted on the class website a "naming coordinate compounds" sheet. This sheet lists cyanido as a new convention, but I'm pretty sure that both cyano and cyanido will be accepted for the exam.
- Wed Dec 04, 2019 9:14 pm
- Forum: Naming
- Topic: Polydentate
- Replies: 2
- Views: 97
Re: Polydentate
What is the best way to approach a problem asking if a molecule is polydentate? Is it necessary to draw out the entire lewis structure to determine where the lone pair electrons are located? Are there any shortcuts for when it is an especially large molecule?
Re: "Ferrate"
Does that mean it's incorrect to name a compound using iron(III) instead of ferrate?
- Wed Nov 27, 2019 2:13 pm
- Forum: Dipole Moments
- Topic: Amide vs N-H
- Replies: 2
- Views: 153
Re: Amide vs N-H
When determining boiling points, one needs to consider IMFs, which are interactions that occur between different molecules of a substance, not within the molecules. These interactions include hydrogen bonding, London dispersion forces, and dipole-dipole interactions. The boiling point depends on how...
- Wed Nov 27, 2019 2:08 pm
- Forum: Amphoteric Compounds
- Topic: Question 6A.11
- Replies: 5
- Views: 179
Re: Question 6A.11
ishaa Diwakar 4E wrote:H2CO3 and H2SO4 are considered diprotic, meaning they usually lose two protons as anions. So, when they lose only one, they are able to lose one more and act as an acid, even with a negative charge.
What characteristics of these compounds shows that they are diprotic?
- Wed Nov 27, 2019 2:05 pm
- Forum: Sigma & Pi Bonds
- Topic: Nodal plane
- Replies: 3
- Views: 72
Re: Nodal plane
I think it is helpful to think of nodal planes using the 3D shapes that the book has for orbitals. Knowing that nodal planes are areas where there is a zero percent chance of finding an electron, think of a sphere (sigma bond) and how there is no gaps within it. P orbitals are made up of multiple or...
- Wed Nov 27, 2019 2:00 pm
- Forum: Amphoteric Compounds
- Topic: Amphoteric characteristics
- Replies: 3
- Views: 82
Re: Amphoteric characteristics
Like the previous post explains, metalloids usually form amphoteric compounds because they fall in between metals and non-metals (and therefore share characteristics/properties of both). Another good thing to remember is that water, H_2O, is amphoteric.
- Wed Nov 27, 2019 1:55 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Acid/base strength?
- Replies: 4
- Views: 123
Re: Acid/base strength?
Weak acids and bases will incompletely dissociate/ionize. To represent this in a chemical reaction, you would write an equilibrium equation and use the concentrations of reactants and products to determine what percent ionized. equilibrium constant (K) = [products]/[reactants]
- Wed Nov 27, 2019 1:50 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordinate covalent bonds
- Replies: 3
- Views: 94
Re: Coordinate covalent bonds
I believe a coordinate bond is still covalent, because electrons are technically being shared (even if it is uneven) rather than fully donated, which would make it ionic.
- Mon Nov 25, 2019 12:11 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: question
- Replies: 1
- Views: 47
Re: question
I don't believe that Professor Lavelle has brought these up in class, and I believe that means we won't need to know it.
- Mon Nov 25, 2019 12:10 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Shape
- Replies: 2
- Views: 60
Re: Shape
To figure out molecular shape, you have to use the VSEPR formulas. Ex. a molecule of AX_4 is tetrahedral, while a molecule of AX_4E_2 is square planar.
- Mon Nov 25, 2019 12:09 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligand
- Replies: 10
- Views: 172
Re: Ligand
How does this term relate to ligands that are discussion in terms of biology?
- Mon Nov 25, 2019 12:07 am
- Forum: Electronegativity
- Topic: ionic character
- Replies: 9
- Views: 308
Re: ionic character
Diana A 1G wrote:If a molecule has more ionic character, is it soluble in water? Even if its a covalent bond?
I'm not sure what you mean by a covalent bond with ionic character?
- Mon Nov 25, 2019 12:05 am
- Forum: Resonance Structures
- Topic: Resonance
- Replies: 5
- Views: 233
Re: Resonance
It it better to have 2 formal charges of -1 or 1 formal charge of -2?
- Mon Nov 25, 2019 12:03 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Hydrogen Bonding
- Replies: 13
- Views: 207
Re: Hydrogen Bonding
Isn't it possible for hydrogen bonding to occur in a symmetrical formation that would cause dipole moments to cancel and the whole molecule to be non polar?
- Mon Nov 25, 2019 12:02 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: NH3
- Replies: 4
- Views: 124
Re: NH3
When you say neutral are you referring to the charge or the polarity? It is neutrally charged, but a polar atom.
- Sun Nov 24, 2019 11:59 pm
- Forum: Properties of Light
- Topic: Frequency vs. Velocity
- Replies: 8
- Views: 291
Re: Frequency vs. Velocity
Is velocity of light always constant?
- Sun Nov 24, 2019 11:55 pm
- Forum: Balancing Chemical Reactions
- Topic: Conservation of electrons/protons
- Replies: 7
- Views: 335
Re: Conservation of electrons/protons
If the molecule has a certain coefficient after balancing the equation, would the electrons also be multiplied by that coefficient?
- Sun Nov 24, 2019 11:49 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 2
- Views: 81
Re: Test 2
I'm not positive, but I'm pretty sure Professor Lavelle will do review the last lecture before the final. It seems too late to learn new material.
- Sun Oct 20, 2019 11:26 pm
- Forum: *Shrodinger Equation
- Topic: Hamiltonian
- Replies: 6
- Views: 124
Re: Hamiltonian
What does double derivative mean? The derivative of what?
- Sun Oct 20, 2019 11:25 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Difference between the electron shell and orbitals
- Replies: 4
- Views: 108
Difference between the electron shell and orbitals
What is the relationship/difference between electron shells and orbitals?
- Sun Oct 20, 2019 11:13 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Nodal Planes
- Replies: 3
- Views: 69
Re: Nodal Planes
A nodal plane is an area where the probability of finding an electron in that area is 0.
- Sun Oct 20, 2019 11:12 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Conceptual Understanding of Wave Function
- Replies: 2
- Views: 50
Conceptual Understanding of Wave Function
Are wave functions always describing orbitals? For example, when its a function of (x,y,z) is that the same thing as being a function of (n,l,m)?
- Sun Oct 06, 2019 2:36 pm
- Forum: Balancing Chemical Reactions
- Topic: Strategies for Balancing Chemical Equations
- Replies: 12
- Views: 223
Re: Strategies for Balancing Chemical Equations
Is there ever a situation where a chemical equation can't be balanced?
Ex. 2HCl --> 3HCl
Ex. 2HCl --> 3HCl
- Sun Oct 06, 2019 2:32 pm
- Forum: Balancing Chemical Reactions
- Topic: Importance of the State of Molecules
- Replies: 6
- Views: 388
Importance of the State of Molecules
Is it important to include the state (solid/liquid/gas) when writing and balancing reactions? Will we be penalized if they are left off on a test? How does the state of a molecule affect the reaction?
- Sun Oct 06, 2019 2:30 pm
- Forum: Balancing Chemical Reactions
- Topic: Combustion
- Replies: 12
- Views: 285
Re: Combustion
Can something other than a hydrocarbon combust? Would an equation with a molecule not containing carbon or hydrogen reacting with O2 not be considered combustion?
- Sun Oct 06, 2019 2:26 pm
- Forum: Empirical & Molecular Formulas
- Topic: Rounding vs. Multiplying
- Replies: 4
- Views: 81
Rounding vs. Multiplying
If you are solving for an empirical formula and the ratios are not whole numbers, when do you round and when do you multiply?
Ex. 1 C : 1.1 O : 1 N
Would you round 1.1 down or multiply by 10 to get an integer?
Ex. 1 C : 1.1 O : 1 N
Would you round 1.1 down or multiply by 10 to get an integer?
- Sun Oct 06, 2019 2:20 pm
- Forum: Limiting Reactant Calculations
- Topic: Chem Community logistics [ENDORSED]
- Replies: 4
- Views: 91
Re: Chem Community logistics [ENDORSED]
What time are you supposed to post by on Sunday? Lavelle just said Sunday night -- is that 11:59 pm?