Search found 50 matches

by Natalie C 1K
Sun Dec 08, 2019 7:06 pm
Forum: Calculating the pH of Salt Solutions
Topic: pH formula?
Replies: 21
Views: 611

Re: pH formula?

the pH is calculated using the formula: pH= -log[H3O+]
by Natalie C 1K
Sun Dec 08, 2019 7:03 pm
Forum: Lewis Acids & Bases
Topic: neutralization
Replies: 6
Views: 149

Re: neutralization

neutralization occurs when an acid and a base react to form a salt and water
by Natalie C 1K
Sun Dec 08, 2019 6:59 pm
Forum: Bronsted Acids & Bases
Topic: Hydrogen Bonding
Replies: 10
Views: 159

Re: Hydrogen Bonding

no, because it is an intermolecular force
by Natalie C 1K
Sun Dec 08, 2019 6:58 pm
Forum: Bronsted Acids & Bases
Topic: NH3
Replies: 5
Views: 110

Re: NH3

you cannot assume it is a base because it is amphiprotic (it can act as an acid or a base)
by Natalie C 1K
Sun Dec 08, 2019 6:56 pm
Forum: Conjugate Acids & Bases
Topic: Bronsted vs Conjugate
Replies: 3
Views: 99

Re: Bronsted vs Conjugate

a bronsted acid is the proton donator. a conjugate acid is just the resulting acid in the products of a reaction that is formed when a bronsted base accepts a proton
by Natalie C 1K
Sun Dec 01, 2019 11:39 pm
Forum: Bronsted Acids & Bases
Topic: Water as an acid and base
Replies: 7
Views: 54

Re: Water as an acid and base

water is amphoteric, which means that it can either donate or accept protons
by Natalie C 1K
Sun Dec 01, 2019 11:34 pm
Forum: Lewis Acids & Bases
Topic: Weak vs. Strong
Replies: 8
Views: 160

Re: Weak vs. Strong

strong acids dissociate completely in solution, while strong bases dissociate completely in water
by Natalie C 1K
Sun Dec 01, 2019 11:18 pm
Forum: Amphoteric Compounds
Topic: Identifying Them?
Replies: 12
Views: 99

Re: Identifying Them?

amphoteric compounds are able to donate and accept protons (hydrogen atoms)
by Natalie C 1K
Sun Dec 01, 2019 11:16 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Neutralization
Replies: 7
Views: 88

Re: Neutralization

it occurs between an acid an a base and produces water(h2o) and salt
by Natalie C 1K
Sun Dec 01, 2019 11:13 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Acids Vs. Bases
Replies: 11
Views: 147

Re: Acids Vs. Bases

acids donate protons, while bases accept protons
by Natalie C 1K
Sun Nov 24, 2019 11:12 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Bronsted vs. Lewis Acids
Replies: 9
Views: 76

Re: Bronsted vs. Lewis Acids

Lewis acids accepts electrons, while Bronsted acids donate protons (H+). They are essentially the same, but one looks at electrons, while the other focuses on protons
by Natalie C 1K
Sun Nov 24, 2019 11:07 pm
Forum: Bronsted Acids & Bases
Topic: Bronsted vs Lewis acids
Replies: 5
Views: 38

Re: Bronsted vs Lewis acids

Bronsted acids donate protons, while Lewis acids accept electrons
by Natalie C 1K
Sun Nov 24, 2019 11:04 pm
Forum: Lewis Acids & Bases
Topic: Lewis acids + bases and Bronsted acids + bases
Replies: 6
Views: 40

Re: Lewis acids + bases and Bronsted acids + bases

Bronsted acids and and bases refers to the donating and accepting of protons, while Lewis acids and bases refers to the donating and accepting of electrons
by Natalie C 1K
Sun Nov 24, 2019 11:00 pm
Forum: Lewis Acids & Bases
Topic: Proton acceptor and proton donor?
Replies: 33
Views: 260

Re: Proton acceptor and proton donor?

the proton donor is the acid, and the base is the proton acceptor
by Natalie C 1K
Sun Nov 24, 2019 10:56 pm
Forum: Lewis Acids & Bases
Topic: HCl vs HF
Replies: 19
Views: 171

Re: HCl vs HF

the electronegativity of chlorine is less than fluorine, so HCl is the stronger acid, because it can dissociate more easily than HF
by Natalie C 1K
Sun Nov 17, 2019 10:34 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: bond angles
Replies: 8
Views: 59

Re: bond angles

lone pairs have the greatest repulsion strength, and they repulse electrons of other atoms, which push the atoms closer together and decrease the bond angles
by Natalie C 1K
Sun Nov 17, 2019 10:32 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: types of bonds
Replies: 14
Views: 422

Re: types of bonds

yes, a single bond has 1 sigma bond, and bonds after that are pi bonds
by Natalie C 1K
Sun Nov 17, 2019 10:26 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 7
Views: 72

Re: Bond Angles

lone pairs repulse electrons of other atoms and decrease bond angles
by Natalie C 1K
Sun Nov 17, 2019 10:22 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: dipole moments
Replies: 11
Views: 72

Re: dipole moments

in two atoms, dipoles cancel out when the dipoles are facing opposite directions
by Natalie C 1K
Sun Nov 17, 2019 10:18 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs
Replies: 10
Views: 70

Re: Lone Pairs

lone pairs repulse the electrons of other atoms, which affects molecular geometry
by Natalie C 1K
Sun Nov 10, 2019 5:15 pm
Forum: Dipole Moments
Topic: What's a dipole
Replies: 4
Views: 38

Re: What's a dipole

How do you determine whether a dipole is occurring?
by Natalie C 1K
Sun Nov 10, 2019 5:10 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Ion-Dipole Forces
Replies: 4
Views: 44

Re: Ion-Dipole Forces

you can determine whether ion-dipole forces are occurring if attraction occurs between an ion and a neutral molecule with a dipole.
by Natalie C 1K
Sun Nov 10, 2019 4:40 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: D Subshell
Replies: 7
Views: 171

Re: D Subshell

the d-subshell can hold a maximum of 10 electrons. it holds 2 electrons in each of its 5 orbitals.
by Natalie C 1K
Sun Nov 10, 2019 4:14 pm
Forum: Photoelectric Effect
Topic: frequency and ejection of electrons
Replies: 7
Views: 195

Re: frequency and ejection of electrons

increasing the frequency will increase the kinetic energy of ejected electrons. this is only true if the threshold energy is met
by Natalie C 1K
Sun Nov 10, 2019 4:08 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: How to Draw Dipole Arrows
Replies: 8
Views: 115

Re: How to Draw Dipole Arrows

i am still confused on dipole moments... don't all ions have dipole moments because of their different electronegativities?
by Natalie C 1K
Sun Nov 03, 2019 10:08 pm
Forum: Bond Lengths & Energies
Topic: Single bond vs double bond
Replies: 14
Views: 210

Re: Single bond vs double bond

the numbers are the bond length, which is measured in Angstroms. Double bonds are shorter than single bonds which is why the bond length for the double bond was less (shorter) than the length for the single bond
by Natalie C 1K
Sun Nov 03, 2019 10:01 pm
Forum: Bond Lengths & Energies
Topic: Strength of Bonds
Replies: 16
Views: 151

Re: Strength of Bonds

shorter bonds are stronger and harder to break, while longer bonds are weaker
by Natalie C 1K
Sun Nov 03, 2019 9:35 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Water molecules
Replies: 9
Views: 372

Re: Water molecules

both hydrogens are used to form hydrogen bonds
by Natalie C 1K
Sun Nov 03, 2019 9:28 pm
Forum: Hybridization
Topic: Electrons
Replies: 13
Views: 485

Re: Electrons

this means that an electron is excited and moves to a higher energy level
by Natalie C 1K
Sun Nov 03, 2019 9:27 pm
Forum: Hybridization
Topic: Noble Configuration vs. Full
Replies: 7
Views: 69

Re: Noble Configuration vs. Full

i'm pretty sure that if the question doesn't specify, then writing the noble gas configuration is fine
by Natalie C 1K
Sun Oct 27, 2019 9:11 pm
Forum: Ionic & Covalent Bonds
Topic: Metals Vs. Nonmetals
Replies: 8
Views: 168

Re: Metals Vs. Nonmetals

metals usually form cations and nonmetals form anions. whether an atom forms a cation or an anion depends on their number of valence electrons. if they have a low number of valence electrons, like metals, then it is easier for them to lose electrons in order to gain a full octet. in contrast, if ato...
by Natalie C 1K
Sun Oct 27, 2019 9:01 pm
Forum: Resonance Structures
Topic: Octet
Replies: 13
Views: 160

Re: Octet

an octet means that an atom has 8 valence electrons, which is usually the most stable configuration for an atom. this is why some atoms are found in their most stable configuration as cations or anions, as this provides them with an octet. noble gases have an octet, which makes them the most stable....
by Natalie C 1K
Sun Oct 27, 2019 8:54 pm
Forum: Bond Lengths & Energies
Topic: bond lengths for single or double bonds
Replies: 7
Views: 51

Re: bond lengths for single or double bonds

single bonds are longer than double bonds
by Natalie C 1K
Sun Oct 27, 2019 8:52 pm
Forum: Lewis Structures
Topic: Choosing the central atom
Replies: 16
Views: 159

Re: Choosing the central atom

the atom that has the lowest ionization energy is the central atom! ionization energy decreases down a group and increases across a period
by Natalie C 1K
Sun Oct 27, 2019 8:50 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge Formula
Replies: 5
Views: 57

Re: Formal Charge Formula

shared electrons are the electrons that are involved in covalent bonds. since they are being shared, each atom receives one out of the 2, so you must divide by 2 because you are only calculating the formal charge for one of the atoms
by Natalie C 1K
Sat Oct 19, 2019 1:06 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: quantum number n, l, m
Replies: 13
Views: 127

Re: quantum number n, l, m

how are orbitals, shells, and subshells related to one another? im not sure i understand
by Natalie C 1K
Sat Oct 19, 2019 1:04 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Nodal Planes
Replies: 10
Views: 92

Re: Nodal Planes

if atoms with more electrons have more places where electrons can be found, why does this also increase the amount of nodal planes in that atom?
by Natalie C 1K
Sat Oct 19, 2019 1:02 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: electron spin arrows
Replies: 6
Views: 48

Re: electron spin arrows

electrons have a negative charge, so they like to be as far away from each other as possible. This is why Hund's Rule states that electrons have to be parallel, and in separate orbitals, before they are paired in the same orbital.
by Natalie C 1K
Sat Oct 19, 2019 12:36 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Electron configuration with s and d subshells
Replies: 4
Views: 40

Re: Electron configuration with s and d subshells

As they are filling up, if the energies of the two orbitals fluctuate and change, then why is it always the case that 4s comes before 3d? if they are fluctuating, then shouldn't 3d sometimes come before 4s?
by Natalie C 1K
Sat Oct 19, 2019 12:21 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Spin State
Replies: 6
Views: 83

Re: Spin State

I am still confused about the 1/2. Why can't we just say that one is positive and one is negative? or why isn't it a +1 and a -1?
by Natalie C 1K
Fri Oct 11, 2019 7:11 pm
Forum: Properties of Electrons
Topic: electron energy [ENDORSED]
Replies: 7
Views: 178

Re: electron energy [ENDORSED]

electrons need energy to move up energy levels, so when an electron moves up energy levels, it absorbs energy. in contrast, when an electron moves down energy levels, releases/emits energy.
by Natalie C 1K
Fri Oct 11, 2019 6:23 pm
Forum: DeBroglie Equation
Topic: exhibiting wave-like properties
Replies: 4
Views: 338

Re: exhibiting wave-like properties

in lecture, he said that any moving particle has wavelike properties with wavelength, but these wavelengths are not detectable when they are less than 10^-15m
by Natalie C 1K
Fri Oct 11, 2019 6:19 pm
Forum: Properties of Light
Topic: Energy Levels
Replies: 8
Views: 148

Re: Energy Levels

when an electron drops down from a higher energy level into n=1, a large amount of energy is released, which corresponds to the ultraviolet region because it is the highest energy
by Natalie C 1K
Fri Oct 11, 2019 6:08 pm
Forum: Properties of Light
Topic: Speed of Light
Replies: 41
Views: 1262

Re: Speed of Light

the speed of light is constant ! because it will never change
by Natalie C 1K
Fri Oct 11, 2019 6:05 pm
Forum: Properties of Electrons
Topic: Constructive and Destructive Interference
Replies: 4
Views: 88

Re: Constructive and Destructive Interference

why does destructive interference/waves that are out of phase sometimes cause there to be no wave at all?
by Natalie C 1K
Fri Oct 04, 2019 8:48 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Wrong Textbook
Replies: 12
Views: 372

Re: Wrong Textbook

I have the 6th edition and the homework problems are just about the same as the 7th edition, so you would be okay with that edition of the textbook
by Natalie C 1K
Fri Oct 04, 2019 8:45 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Accuracy v Precision
Replies: 11
Views: 161

Re: Accuracy v Precision

a measurement's accuracy is how close it is to the true value. precision is how close measurements are to one another (aka consistency), whether or not it is close to the true value
by Natalie C 1K
Fri Oct 04, 2019 8:35 pm
Forum: SI Units, Unit Conversions
Topic: Homework
Replies: 9
Views: 203

Re: Homework

Yeah I don't think it matters. I do mine in pencil in case I make a mistake
by Natalie C 1K
Fri Oct 04, 2019 8:22 pm
Forum: Administrative Questions and Class Announcements
Topic: using older edition textbook
Replies: 8
Views: 114

Re: using older edition textbook

I'm using the 6th edition and it's definitely usable ! There are just some questions here and there that are slightly different than the 7th edition.
by Natalie C 1K
Thu Oct 03, 2019 4:05 pm
Forum: SI Units, Unit Conversions
Topic: Discussion Credit
Replies: 7
Views: 135

Re: Discussion Credit

Yes, it's 5 posts and 5 homework problems per week... 5 & 5 to stay alive !

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