Search found 31 matches

by Laura WM 3I
Sat Dec 07, 2019 11:17 pm
Forum: Bronsted Acids & Bases
Topic: List of Strong/Weak Acids/Bases
Replies: 2
Views: 83

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).
by Laura WM 3I
Wed Dec 04, 2019 9:35 pm
Forum: Naming
Topic: 9C.5
Replies: 2
Views: 41

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.
by Laura WM 3I
Wed Dec 04, 2019 9:34 pm
Forum: Naming
Topic: 9C.5
Replies: 2
Views: 41

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...
by Laura WM 3I
Wed Dec 04, 2019 9:28 pm
Forum: Naming
Topic: Homework Problem 9C 3a
Replies: 2
Views: 49

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.
by Laura WM 3I
Wed Dec 04, 2019 9:14 pm
Forum: Naming
Topic: Polydentate
Replies: 2
Views: 43

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?
by Laura WM 3I
Wed Dec 04, 2019 9:12 pm
Forum: Naming
Topic: "Ferrate"
Replies: 14
Views: 643

Re: "Ferrate"

Does that mean it's incorrect to name a compound using iron(III) instead of ferrate?
by Laura WM 3I
Wed Nov 27, 2019 2:13 pm
Forum: Dipole Moments
Topic: Amide vs N-H
Replies: 2
Views: 91

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...
by Laura WM 3I
Wed Nov 27, 2019 2:08 pm
Forum: Amphoteric Compounds
Topic: Question 6A.11
Replies: 5
Views: 114

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?
by Laura WM 3I
Wed Nov 27, 2019 2:05 pm
Forum: Sigma & Pi Bonds
Topic: Nodal plane
Replies: 3
Views: 51

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...
by Laura WM 3I
Wed Nov 27, 2019 2:00 pm
Forum: Amphoteric Compounds
Topic: Amphoteric characteristics
Replies: 3
Views: 46

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.
by Laura WM 3I
Wed Nov 27, 2019 1:55 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Acid/base strength?
Replies: 4
Views: 52

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]
by Laura WM 3I
Wed Nov 27, 2019 1:50 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordinate covalent bonds
Replies: 3
Views: 46

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.
by Laura WM 3I
Mon Nov 25, 2019 12:11 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: question
Replies: 1
Views: 28

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.
by Laura WM 3I
Mon Nov 25, 2019 12:10 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Shape
Replies: 2
Views: 39

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.
by Laura WM 3I
Mon Nov 25, 2019 12:09 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligand
Replies: 10
Views: 82

Re: Ligand

How does this term relate to ligands that are discussion in terms of biology?
by Laura WM 3I
Mon Nov 25, 2019 12:07 am
Forum: Electronegativity
Topic: ionic character
Replies: 9
Views: 170

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?
by Laura WM 3I
Mon Nov 25, 2019 12:05 am
Forum: Resonance Structures
Topic: Resonance
Replies: 5
Views: 158

Re: Resonance

It it better to have 2 formal charges of -1 or 1 formal charge of -2?
by Laura WM 3I
Mon Nov 25, 2019 12:03 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Hydrogen Bonding
Replies: 13
Views: 110

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?
by Laura WM 3I
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: 46

Re: NH3

When you say neutral are you referring to the charge or the polarity? It is neutrally charged, but a polar atom.
by Laura WM 3I
Sun Nov 24, 2019 11:59 pm
Forum: Properties of Light
Topic: Frequency vs. Velocity
Replies: 8
Views: 215

Re: Frequency vs. Velocity

Is velocity of light always constant?
by Laura WM 3I
Sun Nov 24, 2019 11:55 pm
Forum: Balancing Chemical Reactions
Topic: Conservation of electrons/protons
Replies: 6
Views: 235

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?
by Laura WM 3I
Sun Nov 24, 2019 11:49 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 2
Replies: 2
Views: 47

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.
by Laura WM 3I
Sun Oct 20, 2019 11:26 pm
Forum: *Shrodinger Equation
Topic: Hamiltonian
Replies: 6
Views: 68

Re: Hamiltonian

What does double derivative mean? The derivative of what?
by Laura WM 3I
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: 55

Difference between the electron shell and orbitals

What is the relationship/difference between electron shells and orbitals?
by Laura WM 3I
Sun Oct 20, 2019 11:13 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Nodal Planes
Replies: 3
Views: 53

Re: Nodal Planes

A nodal plane is an area where the probability of finding an electron in that area is 0.
by Laura WM 3I
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: 42

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)?
by Laura WM 3I
Sun Oct 06, 2019 2:36 pm
Forum: Balancing Chemical Reactions
Topic: Strategies for Balancing Chemical Equations
Replies: 12
Views: 137

Re: Strategies for Balancing Chemical Equations

Is there ever a situation where a chemical equation can't be balanced?
Ex. 2HCl --> 3HCl
by Laura WM 3I
Sun Oct 06, 2019 2:32 pm
Forum: Balancing Chemical Reactions
Topic: Importance of the State of Molecules
Replies: 6
Views: 243

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?
by Laura WM 3I
Sun Oct 06, 2019 2:30 pm
Forum: Balancing Chemical Reactions
Topic: Combustion
Replies: 12
Views: 205

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?
by Laura WM 3I
Sun Oct 06, 2019 2:26 pm
Forum: Empirical & Molecular Formulas
Topic: Rounding vs. Multiplying
Replies: 4
Views: 77

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?
by Laura WM 3I
Sun Oct 06, 2019 2:20 pm
Forum: Limiting Reactant Calculations
Topic: Chem Community logistics [ENDORSED]
Replies: 4
Views: 82

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?

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