Search found 61 matches

by 905289082
Wed Jan 15, 2020 1:35 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Thermodynamic Stability
Replies: 6
Views: 25

Re: Thermodynamic Stability

Smaller K value -> more thermodynamically stable
by 905289082
Wed Jan 15, 2020 1:34 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Reaction shifts right or left?
Replies: 14
Views: 56

Re: Reaction shifts right or left?

Left shift means that the reaction is going from right to left, thus forming more reactants. The opposite is true with products. Just look at the written equation and whatever is left or right of the arrow is the direction of movement and what's being formed
by 905289082
Wed Jan 15, 2020 1:33 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Partial Pressure
Replies: 19
Views: 47

Re: Partial Pressure

You most likely should be given the partial pressure to complete a problem where you're either solving for Qp or Kp.
by 905289082
Wed Jan 15, 2020 1:32 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Reaction Quotient Units
Replies: 10
Views: 30

Re: Reaction Quotient Units

The reaction quotient is unitless because the units cancel out.
by 905289082
Wed Jan 15, 2020 1:31 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Calculating Q
Replies: 16
Views: 44

Re: Calculating Q

For calculating either Q or K, every time you online include gasses or aq. Never solids or solvents in the calculations
by 905289082
Wed Jan 08, 2020 12:23 pm
Forum: Ideal Gases
Topic: The Difference between Q and Kc [ENDORSED]
Replies: 18
Views: 869

Re: The Difference between Q and Kc [ENDORSED]

how does Kc take into account the values of partial pressure?
by 905289082
Wed Jan 08, 2020 12:20 pm
Forum: Ideal Gases
Topic: Equilibrium
Replies: 7
Views: 28

Re: Equilibrium

Q is the constant of concentration at any point during the reaction, whereas K is the constant of concentration at equilibrium.
by 905289082
Wed Jan 08, 2020 12:18 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Salt Solution
Replies: 5
Views: 251

Re: Salt Solution

would any compound solids and liquids just be considered spectators in the reaction as well?
by 905289082
Wed Jan 08, 2020 12:14 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Gibs free energy
Replies: 3
Views: 12

Re: Gibs free energy

Is the Gibbs free energy constant the same for Q and K? or can you only use it with the K value?
by 905289082
Wed Jan 08, 2020 12:12 pm
Forum: Ideal Gases
Topic: Nitrogen gas
Replies: 5
Views: 235

Ideal Gasses

How do you determine which gasses can be considered "ideal"?
by 905289082
Wed Dec 04, 2019 10:55 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Determining binding sites
Replies: 3
Views: 30

Re: Determining binding sites

When determining the coordination number, and/or the number of binding sites, you look at the number of ATOMS with electron pairs, not the number of electron pairs. Hope this helps.
by 905289082
Wed Dec 04, 2019 10:54 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 3
Views: 30

Re: Ligands

I'd recommend just focusing on memorizing the chart Lavelle emailed, but as you do more practice too you will begin to pick up on the main ligands and their charges.
by 905289082
Wed Dec 04, 2019 10:53 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number
Replies: 6
Views: 46

Re: Coordination Number

Pretty much the number of bonds that the coordination compounds has formed is the coordination number.
by 905289082
Wed Dec 04, 2019 10:52 am
Forum: Naming
Topic: Determining Type of Ligand
Replies: 2
Views: 21

Determining Type of Ligand

How are you supposed to determine whether a compound is mono, bi, tri, or polydentate? I know you're supposed to look at bonding sites, but does each lone pair of electrons count towards the coordination number?
by 905289082
Wed Dec 04, 2019 10:50 am
Forum: Naming
Topic: Roman numerals
Replies: 7
Views: 48

Re: Roman numerals

You determine roman numeral by finding the oxidation number of the metal. You determine the charge on the ligand, and if the coordination compound is an ion, then you can find the oxidation number by determining what number will make all charges true.
by 905289082
Mon Dec 02, 2019 8:58 am
Forum: Naming
Topic: oxidation
Replies: 8
Views: 39

Re: oxidation

does the oxidation number come at the end of the entire compound? or just the transition metal
by 905289082
Mon Dec 02, 2019 8:56 am
Forum: Calculating the pH of Salt Solutions
Topic: konstant?
Replies: 5
Views: 204

Re: konstant?

When you do equations with the equilibrium constant K though, its important to note that although the equation is products/ reactants, water will be equal to zero.
by 905289082
Mon Dec 02, 2019 8:55 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pH scale
Replies: 12
Views: 59

Re: pH scale

The pH scale definitely can not go negative because it is the factor 10 of H+ ions, so from a mathematical standpoint it would make no sense to have a negative concentration of H+ ions.
by 905289082
Mon Dec 02, 2019 8:54 am
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Are noble gases considered bases?
Replies: 8
Views: 858

Re: Are noble gases considered bases?

Technically no because it's so rare that noble gasses even engage with anything that they're considered inactive. The definition of a base is that it receives electrons.
by 905289082
Mon Dec 02, 2019 8:53 am
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Weak acids & pH
Replies: 4
Views: 49

Re: Weak acids & pH

In some solvents, the acid, although weak, will dissociate more.
by 905289082
Tue Nov 26, 2019 9:29 am
Forum: *Crystal Field Theory
Topic: Electric Field
Replies: 5
Views: 1315

Re: Electric Field

Anions create a static field that help to break down electron orbitals, mainly d and f by the crystal field theory
by 905289082
Tue Nov 26, 2019 9:27 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Naming
Replies: 3
Views: 24

Re: Naming

are the metals always named last then even if they're names are later in the alphabet?
by 905289082
Tue Nov 26, 2019 9:26 am
Forum: Industrial Examples
Topic: Favorite Industrial Example
Replies: 3
Views: 335

Re: Favorite Industrial Example

A coordination compound is a metallic central atom surrounded by other atoms or molecules that are known as ligands or complexing agents.
by 905289082
Tue Nov 26, 2019 9:25 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: coordination number
Replies: 3
Views: 29

Re: coordination number

if you have a coordination site and a bond inside on of those compounds, does that mean that the coordination number would be four then?
by 905289082
Tue Nov 26, 2019 9:23 am
Forum: Naming
Topic: -ate ending
Replies: 8
Views: 47

Re: -ate ending

if you only use ate for a negative charge, what do you use for positive and neutral charges?
by 905289082
Sun Nov 17, 2019 10:48 pm
Forum: Bond Lengths & Energies
Topic: Strongest Bonds
Replies: 11
Views: 85

Re: Strongest Bonds

The strongest is dipole dipole followed by ion-dipole.
by 905289082
Sun Nov 17, 2019 10:47 pm
Forum: Lewis Structures
Topic: Oxygen
Replies: 9
Views: 68

Re: Oxygen

Oxygen can have single, double, or triple bonds depending on the molecule and corresponding Lewis structure.
by 905289082
Sun Nov 17, 2019 10:47 pm
Forum: Electronegativity
Topic: Noble Gases
Replies: 19
Views: 151

Re: Noble Gases

Neon gas yes, is part of the normal electronegativity trends. Noble gasses, on the other hand, don't follow the pattern because they all already have filled valence shells.
by 905289082
Sun Nov 17, 2019 10:46 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizable vs polarizing power
Replies: 5
Views: 46

Re: Polarizable vs polarizing power

Does distortion in regards to polarizability necessarily mean the ability to form octets? or just the ability to attract electrons from another atom's electron cloud
by 905289082
Sun Nov 17, 2019 10:44 pm
Forum: Sigma & Pi Bonds
Topic: Test 2 Sigma and Pi bonds
Replies: 5
Views: 35

Re: Test 2 Sigma and Pi bonds

What is the relevance of having a sigma vs. a pi bond? is there an effect on bond strength and energy?
by 905289082
Tue Nov 12, 2019 9:28 am
Forum: Bond Lengths & Energies
Topic: Shorter bond lengths
Replies: 12
Views: 69

Re: Shorter bond lengths

We know that double bonds are shorter ands stronger than single bonds, and that triple bonds are even more so than double. But how do the length and strengths of these bonds effect the different energies?
by 905289082
Tue Nov 12, 2019 9:27 am
Forum: Ionic & Covalent Bonds
Topic: Resonance (all bonds are a hybrid of different bonds)
Replies: 10
Views: 69

Re: Resonance (all bonds are a hybrid of different bonds)

Is it possible to have a resonance structure where the bond that changes with each different possible structure is a triple bond instead of a double bond??
by 905289082
Tue Nov 12, 2019 9:26 am
Forum: Biological Examples
Topic: Ligands
Replies: 6
Views: 311

Re: Ligands

Do the functions of these particular ligands effect the structures of the molecules? Or just the composition?
by 905289082
Tue Nov 12, 2019 9:22 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Magnetic Quantum numbers
Replies: 4
Views: 48

Re: Magnetic Quantum numbers

Magnetic quantum numbers can range from -l to l, and there are either going to be 1, 3, 5, 7 depending on the value of l
by 905289082
Tue Nov 12, 2019 9:17 am
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR Model
Replies: 3
Views: 24

Re: VSEPR Model

Are there specific molecules that we need to memorize the VSEPR models for then or will they be given?
by 905289082
Sun Nov 03, 2019 9:49 am
Forum: Octet Exceptions
Topic: Expanded Octets and Formal Charge
Replies: 3
Views: 23

Re: Expanded Octets and Formal Charge

Are there only particular atoms/molecules that allow for expanded octets? Also is there a way to explain why this is possible for some and not all?
by 905289082
Sun Nov 03, 2019 9:47 am
Forum: Electronegativity
Topic: Electronegativity
Replies: 9
Views: 52

Re: Electronegativity

What is the pattern on the periodic table that we're supposed to memorize for determining electronegativity?
by 905289082
Sun Nov 03, 2019 9:46 am
Forum: Dipole Moments
Topic: Dipole Moments
Replies: 3
Views: 28

Re: Dipole Moments

That being said, you can look for patterns because the further two elements are from each other on the periodic table they'll have greater dipole moments.
by 905289082
Sun Nov 03, 2019 9:45 am
Forum: Quantum Numbers and The H-Atom
Topic: The plus and minus sign on the magnetic quantum #
Replies: 5
Views: 35

Re: The plus and minus sign on the magnetic quantum #

Because the values are only going to be +1/2 or -1/2, I feel like just doing a + or - will be sufficient to distinguish.
by 905289082
Sun Nov 03, 2019 9:44 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Wavelength Plausibility
Replies: 30
Views: 839

Re: Wavelength Plausibility

Technically, if the question asks if the wavelength is detectable, or more often it will ask if there are "detectable wavelike properties" that means that it wants to know whether the wavelength is greater than 10e-15 or not.
by 905289082
Thu Oct 24, 2019 9:29 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configurations
Replies: 13
Views: 126

Re: Electron Configurations

It's important that you memorize the different groups while looking at the periodic table. The lefthand side has the s groups, the middle the d groups, and the right side the p groups. Then, the constant that determines which orbital it is corresponds to the period # (for s and p groups) and period ...
by 905289082
Thu Oct 24, 2019 9:27 am
Forum: Trends in The Periodic Table
Topic: Ionization Energy [ENDORSED]
Replies: 3
Views: 50

Re: Ionization Energy [ENDORSED]

As you move down the period, it would decrease because the repulsion amongst the electron cloud decreases, which lowers the ionization energy.
by 905289082
Thu Oct 24, 2019 9:25 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty value in equation
Replies: 9
Views: 55

Re: Uncertainty value in equation

Do uncertainty values always have to be whole integers? also when giving the "total uncertainty" do you always know to just add the numbers or will it ever specify for the range?
by 905289082
Thu Oct 24, 2019 9:24 am
Forum: Properties of Electrons
Topic: d-orbital in the electron configuration
Replies: 3
Views: 29

Re: d-orbital in the electron configuration

As seen through the Aufbau Principle, it's imperative to fill the 3d energy level before you can fill the 4d.
by 905289082
Thu Oct 24, 2019 9:23 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals
Replies: 5
Views: 37

Re: Orbitals

Yes, there are always going to be n-1 possible values. But 0 is included in those, so it would only go from 0-5!
by 905289082
Thu Oct 24, 2019 9:23 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals
Replies: 5
Views: 37

Re: Orbitals

Yes, there are always going to be n-1 possible values. But 0 is included in those, so it would only go from 0-5!
by 905289082
Thu Oct 17, 2019 9:24 am
Forum: DeBroglie Equation
Topic: De Broglie Wavelength
Replies: 7
Views: 49

Re: De Broglie Wavelength

I think it just means to use the De Broglie equation because the De Broglie equation is derived from the equations E=pc, c= wavelength*frequency, and E=hv which we have learned before. However, this equation only works for any particle with a rest mass, momentum, and wavelength so if it asks for th...
by 905289082
Thu Oct 17, 2019 9:23 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Atomic Radius
Replies: 4
Views: 39

Re: Atomic Radius

Are there specific values somewhere on the periodic table that can be used to determine atomic radius or do you just have to determine comparatively by location?
by 905289082
Thu Oct 17, 2019 9:22 am
Forum: Photoelectric Effect
Topic: Question about Energy Threshold
Replies: 7
Views: 51

Re: Question about Energy Threshold

If the energy isn't enough to pass the threshold, the photon won't be able to remove electrons. The energy of the photon needs to be greater than the energy of the electron to remove it.
by 905289082
Thu Oct 17, 2019 9:20 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Determining Orbitals Based on Periodic Table
Replies: 2
Views: 20

Determining Orbitals Based on Periodic Table

In class, Dr. Lavelle mentioned that we only really need to be concerned with three of the types of orbitals. Those that correspond with the left of the periodic table, the first row through the middle, and the righthand columns respectively. Is this the case? Also how do we determine which orbitals...
by 905289082
Thu Oct 17, 2019 9:18 am
Forum: *Black Body Radiation
Topic: black body
Replies: 2
Views: 51

Re: black body

The extent to which black bodies were discussed in the textbook was pretty much a general definition. So likely we just have to know that its a concept in quantum mechanics that there's a substance of some sort that absorbs all types of radiation and waves of light.
by 905289082
Fri Oct 11, 2019 9:09 am
Forum: Properties of Electrons
Topic: wave/particle properties of mass
Replies: 3
Views: 35

Re: wave/particle properties of mass

Technically, the movement of any matter (such as the water in a bucket example someone mentioned above), is wave movement. BUT, if you break anything down to an atomic level, wouldn't it have particle movement instead? But then, does all matter definitely have wave movement instead or is that imposs...
by 905289082
Fri Oct 11, 2019 9:06 am
Forum: Properties of Electrons
Topic: Energy Levels
Replies: 8
Views: 53

Re: Energy Levels

When looking at energy levels, is there a direct correspondence of 1 photon -> 1 energy level? wouldn't it depend on the intensity of a photon, or is the intensity the same for all photons, and thus a constant relationship between photons and energy level?
by 905289082
Fri Oct 11, 2019 9:05 am
Forum: Trends in The Periodic Table
Topic: Atomic Radius
Replies: 16
Views: 145

Re: Atomic Radius

how does the radius of atoms change as electrons become excited/energy levels shift? is there a linear increase/decrease in radius?
by 905289082
Fri Oct 11, 2019 9:04 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg equation [ENDORSED]
Replies: 73
Views: 1619

Re: Rydberg equation [ENDORSED]

When is an example of when you would use the Rydberg equation?
by 905289082
Fri Oct 11, 2019 9:02 am
Forum: Properties of Light
Topic: Clarification on Frequency
Replies: 8
Views: 86

Do photons change with wavelength?

I'm trying to visualize some of what we went over in lecture about how shorter, less intense wavelengths have enough energy in a single photon to displace elections. I was wondering what about photons changed with wavelength (is it intensity?), and if there's an equation that relates them?
by 905289082
Thu Oct 03, 2019 2:18 pm
Forum: Significant Figures
Topic: Sig Figs
Replies: 4
Views: 42

Re: Sig Figs

If it's a problem that requires you to use molar masses, it would make sense that you definitely take them into account. For example, if in a word problem you're given masses to the ten thousandths place, and you find molar masses only to the thousandths place, you would need to round the given mass...
by 905289082
Thu Oct 03, 2019 2:15 pm
Forum: Limiting Reactant Calculations
Topic: Basic Question
Replies: 11
Views: 108

Re: Basic Question

Technically, it's impossible to have two limiting reactants, because that would mean that both of the reagents would be being used in full. And the definition of a limiting reactant is the one left over in excess. Thus, you could really only have one or zero limiting reactants because you can have a...
by 905289082
Thu Oct 03, 2019 2:13 pm
Forum: Significant Figures
Topic: Sig Fig Rules
Replies: 3
Views: 46

Sig Fig Rules

It has been a few years since I've been in chemistry, and I was hoping to clarify some of the basic sig fig rules. Is it customary to round to the hundredths or the thousands place when presenting a mass value (g) as your answer? Also, do the rules for this vary greatly based off of what type of pro...
by 905289082
Thu Oct 03, 2019 2:10 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Avogadro's Number?
Replies: 16
Views: 165

Re: Avogadro's Number?

It's important to know Avogadro's number because it's equivalent to the number of atoms in a single carbon 12, and normalized as a way to measure a single mole. Whenever we need Avogadro's number, I think it will be given to us, but most regularly you'll need to use it in order to convert from moles...
by 905289082
Wed Oct 02, 2019 3:18 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Balancing Equations [ENDORSED]
Replies: 25
Views: 477

Re: Balancing Equations [ENDORSED]

When balancing an equation in lecture prof Lavelle multiplied the entire equation by 2 in order to get the lowest whole number. Will points be deducted on the test if we don’t do so ? I would assume you'd receive a lower grade if you didn't do something similar, because if you recall, in the exampl...

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