Search found 42 matches

by Veronica Lu 3L
Sun Jan 12, 2020 11:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: memorization
Replies: 12
Views: 35

Re: memorization

These are typically given on exams.
by Veronica Lu 3L
Sun Jan 12, 2020 11:40 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Units for K
Replies: 21
Views: 52

Re: Units for K

There are no units since K is more so a ratio
by Veronica Lu 3L
Sun Jan 12, 2020 11:39 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Homogenous Equilibrium
Replies: 13
Views: 28

Re: Homogenous Equilibrium

When products and reactants are in the same phase, the reaction is known as homogenous
by Veronica Lu 3L
Sun Jan 12, 2020 11:38 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Reaction Direction
Replies: 8
Views: 38

Re: Reaction Direction

When dealing with equilibrium, the reactions are typically reversible meaning that it could be left to right or the other way around
by Veronica Lu 3L
Sun Jan 12, 2020 11:28 pm
Forum: Ideal Gases
Topic: Q vs. K
Replies: 10
Views: 20

Re: Q vs. K

Both are calculated using the same formulas but Q is used anytime during the reaction whilst K is calculated with equilibrium concentration and values!
by Veronica Lu 3L
Sun Dec 08, 2019 12:06 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: Strength
Replies: 6
Views: 36

Re: Strength

105289321 wrote:Are LDF present in all molecules?
yes London Forces are present in all molecules
by Veronica Lu 3L
Sat Dec 07, 2019 1:51 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Electron Configuration
Replies: 3
Views: 24

Electron Configuration

I am confused as to how we should order the electron configurations. I recall the correct order being like 4s2 then 3d10. However, in the textbook and midterm solutions it shows them being 3s2 3p6 3d10 then 4s2 4p6 etc. Which is right??
by Veronica Lu 3L
Sun Dec 01, 2019 8:43 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pH scale
Replies: 12
Views: 59

Re: pH scale

In most situations, pH ranges from 0-14
by Veronica Lu 3L
Sun Dec 01, 2019 8:42 pm
Forum: Conjugate Acids & Bases
Topic: Water as an Acid/Base
Replies: 20
Views: 391

Re: Water as an Acid/Base

water can act as both an acid and a base
by Veronica Lu 3L
Sun Dec 01, 2019 8:40 pm
Forum: Conjugate Acids & Bases
Topic: NH3, acid or base?
Replies: 12
Views: 502

Re: NH3, acid or base?

ammonia would be considered a weak base
by Veronica Lu 3L
Sun Dec 01, 2019 8:39 pm
Forum: Lewis Acids & Bases
Topic: acid v. base?
Replies: 16
Views: 71

Re: acid v. base?

Lewis acids will donate electrons and Lewis bases will accept electrons
by Veronica Lu 3L
Sun Dec 01, 2019 8:38 pm
Forum: Lewis Acids & Bases
Topic: Proton acceptor and proton donor?
Replies: 33
Views: 130

Re: Proton acceptor and proton donor?

an acid donates electrons, whereas a base accepts electrons
by Veronica Lu 3L
Sun Nov 24, 2019 11:52 pm
Forum: Hybridization
Topic: Sigma and Pi bonds
Replies: 3
Views: 17

Re: Sigma and Pi bonds

As stated above, the sigma bonds have more of an overlap in the electron cloud between the atoms, thus making the bond stronger.
by Veronica Lu 3L
Sun Nov 24, 2019 11:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: AXE Format
Replies: 34
Views: 119

Re: AXE Format

Simply including the X and the E would suffice.
by Veronica Lu 3L
Sun Nov 24, 2019 11:49 pm
Forum: Naming
Topic: d-metals
Replies: 2
Views: 25

Re: d-metals

yes I believe they are metals with d orbitals.
by Veronica Lu 3L
Sun Nov 24, 2019 11:46 pm
Forum: Naming
Topic: Order in Naming
Replies: 12
Views: 56

Re: Order in Naming

first and foremost, place them in alphabetical order then find its charge
by Veronica Lu 3L
Sun Nov 24, 2019 11:44 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Cis vs Trans
Replies: 21
Views: 135

Re: Cis vs Trans

cis molecules are polar whereas trans molecules are nonpolar
by Veronica Lu 3L
Sun Nov 17, 2019 9:22 pm
Forum: Dipole Moments
Topic: Hydrogen bonds
Replies: 17
Views: 86

Re: Hydrogen bonds

hydrogen bonds occur when hydrogen bonds with the electronegative elements F, O, N
by Veronica Lu 3L
Sun Nov 17, 2019 9:20 pm
Forum: Resonance Structures
Topic: Resonance Structures
Replies: 18
Views: 107

Re: Resonance Structures

resonance structures are lewis structures that are essentially all the same but have double/triple bonds at different locations
by Veronica Lu 3L
Sun Nov 17, 2019 9:20 pm
Forum: Resonance Structures
Topic: Formal Charge Question
Replies: 15
Views: 94

Re: Formal Charge Question

they need to all add up and equal the overall charge
by Veronica Lu 3L
Sun Nov 17, 2019 9:18 pm
Forum: Bond Lengths & Energies
Topic: Electron Density
Replies: 10
Views: 57

Re: Electron Density

Lone pairs are indeed regions of electron density as they alter the shapes of molecules
by Veronica Lu 3L
Sun Nov 17, 2019 9:17 pm
Forum: Bond Lengths & Energies
Topic: Shorter bond lengths
Replies: 12
Views: 69

Re: Shorter bond lengths

double bonds are shorter since the bonds are stronger and pull them closer together
by Veronica Lu 3L
Sun Nov 03, 2019 9:23 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Stability
Replies: 9
Views: 58

Re: Stability

the formal charge should be zero (or close to it) in order for the octet to be complete and create stability.
by Veronica Lu 3L
Sun Nov 03, 2019 9:22 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Minimize formal charge of whole molecule?
Replies: 7
Views: 35

Re: Minimize formal charge of whole molecule?

ideally, the atoms want to be in their complete octet state where they are the most stable, thus each formal charge should be as close to zero as possible.
by Veronica Lu 3L
Sun Nov 03, 2019 9:17 pm
Forum: Electronegativity
Topic: What is isoelectronic?
Replies: 13
Views: 55

Re: What is isoelectronic?

isoelectronic refers to the situation in which there the number of electrons are equal
by Veronica Lu 3L
Sun Nov 03, 2019 9:16 pm
Forum: Electronegativity
Topic: Noble Gases and Electronegativity
Replies: 3
Views: 19

Re: Noble Gases and Electronegativity

noble gases have no electronegativity since they already have complete octets.
by Veronica Lu 3L
Sun Nov 03, 2019 9:15 pm
Forum: Electronegativity
Topic: Electronegativity
Replies: 9
Views: 51

Re: Electronegativity

fluorine is the most electronegative element; it may be helpful to remember that electronegativity increases as you go to the upper right of the periodic table.
by Veronica Lu 3L
Sun Oct 27, 2019 9:49 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent Bonds
Replies: 11
Views: 74

Re: Covalent Bonds

ionic bonds are characterized as a bond between a metal and a nonmetal, whereas covalent bonds are bonds between two nonmetals.
by Veronica Lu 3L
Sun Oct 27, 2019 9:43 pm
Forum: Sigma & Pi Bonds
Topic: Which bond would break first.
Replies: 15
Views: 608

Re: Which bond would break first.

the pi bond is much weaker than the sigma bond due to the differences in the way that they overlap. Therefore, the pi bond would break first.
by Veronica Lu 3L
Sun Oct 27, 2019 9:40 pm
Forum: Sigma & Pi Bonds
Topic: Importance of Sigma/Pi Bonds
Replies: 5
Views: 185

Re: Importance of Sigma/Pi Bonds

Having the knowledge of whether a bond is a sigma or a pi bond allows one to figure out the structure of the molecule
by Veronica Lu 3L
Sun Oct 27, 2019 9:36 pm
Forum: Sigma & Pi Bonds
Topic: Single vs. Double bonds
Replies: 15
Views: 86

Re: Single vs. Double bonds

The double bonds are much stronger than single bonds, therefore the pull is stronger making them shorter
by Veronica Lu 3L
Sun Oct 27, 2019 9:32 pm
Forum: Properties of Electrons
Topic: Electron removal
Replies: 11
Views: 81

Re: Electron removal

Electrons that are closer to the nucleus are subject to more pull from the positively charged nucleus.
by Veronica Lu 3L
Sun Oct 13, 2019 4:52 pm
Forum: Properties of Electrons
Topic: electron energy
Replies: 4
Views: 41

Re: electron energy

The amount of energy it takes to remove an electron from the ground state of a gaseous atom, molecule or ion. The first ionization energy is the energy needed to remove the first electron from an atom. the second ionization energy is the energy needed to remove the second one and so on.
by Veronica Lu 3L
Sun Oct 13, 2019 4:46 pm
Forum: Einstein Equation
Topic: Units
Replies: 17
Views: 618

Re: Units

I think for the most part it would only go as far as kilograms, but in any case, if megagrams and gigagrams were necessary I think we would be provided a formula sheet to convert the numbers.
by Veronica Lu 3L
Sun Oct 13, 2019 4:41 pm
Forum: Trends in The Periodic Table
Topic: Atomic Radius
Replies: 16
Views: 145

Re: Atomic Radius

The atomic radius is measured only in the group state of the element. A side note: atomic radius increases as you go from the left of the periodic table and down. Therefore, francium has the largest atomic radius out of all the elements.
by Veronica Lu 3L
Sun Oct 13, 2019 4:35 pm
Forum: Properties of Electrons
Topic: electron energy levels
Replies: 6
Views: 31

Re: electron energy levels

Electrons in the outer shell are further from the nucleus; therefore, they are less susceptible to the attractive forces from the nucleus pulling them in.
by Veronica Lu 3L
Sun Oct 13, 2019 10:45 am
Forum: Properties of Electrons
Topic: Constructive vs Destructive Inference
Replies: 4
Views: 30

Re: Constructive vs Destructive Inference

constructive inference is is "constructive" in the sense that its crests are aligned with that of another waves, which does create a higher amplitude. On the other hand, destructive inference is when the waves are unaligned and creates a lower amplitude.
by Veronica Lu 3L
Sun Oct 06, 2019 4:47 pm
Forum: Properties of Light
Topic: unit change
Replies: 4
Views: 43

Re: unit change

The negative exponent brings the “s” down to the denominator, making it “per second”.
by Veronica Lu 3L
Sun Oct 06, 2019 4:43 pm
Forum: Properties of Light
Topic: Oscillating Frequency
Replies: 2
Views: 32

Re: Oscillating Frequency

Longer wavelength means shorter frequency, (inverse relationship) since the longer wavelength can pass through less cycles in a set amount of time compared to shorter wavelengths. Blue light has a shorter frequency so it’s wavelength would be longer.
by Veronica Lu 3L
Sun Oct 06, 2019 4:35 pm
Forum: Properties of Light
Topic: White Light
Replies: 2
Views: 9

Re: White Light

I think white light is in a sense a homogenous mixture of all the different wavelengths (thus colors) of light
by Veronica Lu 3L
Sun Oct 06, 2019 4:28 pm
Forum: Limiting Reactant Calculations
Topic: Reactant vs. Reagent
Replies: 4
Views: 41

Re: Reactant vs. Reagent

There is no difference; reactant and reagent are the same thing.
by Veronica Lu 3L
Thu Oct 03, 2019 4:57 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Lab experiments- accuracy vs precision
Replies: 7
Views: 84

Re: Lab experiments- accuracy vs precision

Precision is how close together your results are to each other, whereas accuracy refers to how close to the known (correct) value the results are.

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