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by abby_hagen
Sat Dec 07, 2019 10:44 pm
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Are noble gases considered bases?
Replies: 8
Views: 826

Re: Are noble gases considered bases?

Noble gases are usually unreactive, so they're unlikely to give up electrons or accept them.
by abby_hagen
Sat Dec 07, 2019 10:42 pm
Forum: Conjugate Acids & Bases
Topic: buffer solutions
Replies: 3
Views: 16

Re: buffer solutions

Yeah, he said that we really only need to now how to calculate for strong acids.
by abby_hagen
Sat Dec 07, 2019 10:41 pm
Forum: Conjugate Acids & Bases
Topic: how to figure out?
Replies: 12
Views: 44

Re: how to figure out?

The conjugate base is what is left after the acid gives off a proton.
by abby_hagen
Sat Dec 07, 2019 10:40 pm
Forum: Bronsted Acids & Bases
Topic: bronsted base and acid
Replies: 4
Views: 21

Re: bronsted base and acid

So, the lewis definition is concerned with electrons while the Bronsted definition is involving protons.
by abby_hagen
Sat Dec 07, 2019 10:38 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Oxoacid Strength
Replies: 6
Views: 24

Re: Oxoacid Strength

Okay, that makes sense. So, when concerning bond lengths, it's the comparison between hydrogen and another atom.
by abby_hagen
Sat Dec 07, 2019 10:35 pm
Forum: Amphoteric Compounds
Topic: Amphiprotic
Replies: 7
Views: 19

Re: Amphiprotic

Water is an example of this.
by abby_hagen
Sun Nov 24, 2019 9:48 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Formation of coordinate covalent bonds
Replies: 2
Views: 13

Re: Formation of coordinate covalent bonds

So, the number of coordination compounds depends on the number of bonds that the transition metal will make to neutralize the charge.
by abby_hagen
Sun Nov 24, 2019 9:45 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Drawing Structures
Replies: 4
Views: 27

Re: Drawing Structures

Yeah, we just draw the lewis structure like we always have
by abby_hagen
Sun Nov 24, 2019 9:43 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Sphere
Replies: 5
Views: 20

Re: Coordination Sphere

So water would be outside of the coordination sphere?
by abby_hagen
Sun Nov 24, 2019 9:41 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Central atom?
Replies: 5
Views: 33

Re: Central atom?

Okay, that makes sense
by abby_hagen
Sun Nov 24, 2019 9:35 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Numbers
Replies: 4
Views: 15

Re: Coordination Numbers

Yeah, so to tell the coordination number you have to see the number of bonds, but I think you can predict it based on the number of bonds it is able to form.
by abby_hagen
Sun Nov 17, 2019 3:33 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: regions of electron density
Replies: 10
Views: 40

Re: regions of electron density

Recognizing regions of electron density does give an idea of the general shape, but the actual atoms give it a name.
by abby_hagen
Sun Nov 17, 2019 3:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs
Replies: 5
Views: 33

Re: Lone Pairs

Lone pairs are regions of electron density, so it does need to be taken into consideration. Like an atom with two attached atoms and no lone pairs will be linear, but if a lone pair was added, it would become bent.
by abby_hagen
Sun Nov 17, 2019 3:28 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Dipole moments
Replies: 4
Views: 18

Re: Dipole moments

Yeah, the arrow points towards the more electronegative atom
by abby_hagen
Sun Nov 17, 2019 3:27 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Can there be lone pairs on the central atom if the shape is linear?
Replies: 4
Views: 20

Re: Can there be lone pairs on the central atom if the shape is linear?

If you just had two atoms attached with two lone pairs, it would end up being bent, as the lone pairs wouldn't be able to just be opposite of each other. It would end up looking like a water molecule.
by abby_hagen
Sun Nov 17, 2019 3:19 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 2
Views: 11

Re: Bond Angles

You don't need to know the exact angle in these cases, just if it's less or more than the expected angle.
by abby_hagen
Sun Nov 10, 2019 8:18 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal charge
Replies: 16
Views: 59

Re: Formal charge

More electronegative atoms can have a negative formal charge if you need to give them one.
by abby_hagen
Sun Nov 10, 2019 8:17 pm
Forum: Formal Charge and Oxidation Numbers
Topic: formal charge
Replies: 7
Views: 32

Re: formal charge

You really only need to do it when they ask for it. But you should when drawing resonance structures just so you can find out if it's more stable.
by abby_hagen
Sun Nov 10, 2019 8:16 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Shortcut for Formal Charge
Replies: 14
Views: 57

Re: Shortcut for Formal Charge

Just think about the number of lone electrons and the number of lines.
by abby_hagen
Sun Nov 10, 2019 8:15 pm
Forum: Formal Charge and Oxidation Numbers
Topic: central atom
Replies: 21
Views: 90

Re: central atom

Yes, the central atom should have a zero charge
by abby_hagen
Sun Nov 10, 2019 8:14 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge
Replies: 9
Views: 55

Re: Formal Charge

If the compound has no charge, then the formal charge should be zero.
by abby_hagen
Sun Nov 10, 2019 8:13 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Calculating formal charge
Replies: 4
Views: 30

Re: Calculating formal charge

Valence electrons just show how many bonds can be formed, while formal charge shows the bonds.
by abby_hagen
Sat Nov 02, 2019 2:00 pm
Forum: Lewis Structures
Topic: Drawing Lewis Structures
Replies: 4
Views: 18

Re: Drawing Lewis Structures

If there are multiple places you can place the double bond, that shows resonance. But you'll want to limit the formal charges on each atom.
by abby_hagen
Sat Nov 02, 2019 1:58 pm
Forum: Lewis Structures
Topic: Expanded Shells
Replies: 3
Views: 49

Re: Expanded Shells

Yeah, it becomes the 18-electron rule to reach a noble gas configuration
by abby_hagen
Sat Nov 02, 2019 1:54 pm
Forum: Lewis Structures
Topic: Exceptions to the Octet
Replies: 5
Views: 32

Re: Exceptions to the Octet

Only a few elements really need to form an octet, because after that you reach the d-orbital, the 18-electron rule becomes apparent
by abby_hagen
Sat Nov 02, 2019 1:51 pm
Forum: Lewis Structures
Topic: central atom
Replies: 16
Views: 107

Re: central atom

It's the least electronegative because it's the one that can form the most bonds
by abby_hagen
Sat Nov 02, 2019 1:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Midterm
Replies: 6
Views: 72

Re: Midterm

I think he said it wouldn't be on the midterm because we hadn't covered it in lecture
by abby_hagen
Sun Oct 27, 2019 8:48 pm
Forum: Trends in The Periodic Table
Topic: Electron Affinity
Replies: 6
Views: 25

Re: Electron Affinity

Okay, that makes more sense.
by abby_hagen
Sun Oct 27, 2019 8:47 pm
Forum: Trends in The Periodic Table
Topic: Ionization energy
Replies: 12
Views: 66

Re: Ionization energy

All you're really supposed to know for Ionization Energies is the trends for lewis structures later.
by abby_hagen
Sun Oct 27, 2019 8:46 pm
Forum: Trends in The Periodic Table
Topic: Central Atom
Replies: 13
Views: 50

Re: Central Atom

Just put the ones that are more left and more down as the central atom, as they have lower ionization energies.
by abby_hagen
Sun Oct 27, 2019 8:43 pm
Forum: Trends in The Periodic Table
Topic: F orbital
Replies: 3
Views: 8

Re: F orbital

Yeah, I think my TA said the same thing
by abby_hagen
Sun Oct 27, 2019 8:43 pm
Forum: Trends in The Periodic Table
Topic: Electronegativity vs. Electron affinity
Replies: 8
Views: 46

Re: Electronegativity vs. Electron affinity

Yes, electron negativity is the ability to attract paired electrons, while electron affinity is the energy used when an electron is added.
by abby_hagen
Sun Oct 20, 2019 4:07 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Overlapping
Replies: 4
Views: 38

Re: Overlapping

Okay, that makes more sense
by abby_hagen
Sun Oct 20, 2019 4:04 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Shell, Subshell, Orbital Terminology
Replies: 8
Views: 75

Re: Shell, Subshell, Orbital Terminology

n is just the energy level of the electron, the principal quantum number, and sort of shows the size of the orbital
by abby_hagen
Sun Oct 20, 2019 3:58 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Inner e- and Outer e-
Replies: 14
Views: 78

Re: Inner e- and Outer e-

The outer electrons feel less of an electrostatic attraction, they're shielded by the inner ones from the nucleus.
by abby_hagen
Sun Oct 20, 2019 3:51 pm
Forum: Properties of Light
Topic: N levels
Replies: 8
Views: 53

Re: N levels

Yeah, the n-levels are just the energy levels that an electron can jump or fall to
by abby_hagen
Sun Oct 20, 2019 3:50 pm
Forum: DeBroglie Equation
Topic: Mass of electron and photon
Replies: 5
Views: 41

Re: Mass of electron and photon

The mass of an electron should be given, but it's 9.109* 10^-31 kg for an electron
by abby_hagen
Sun Oct 20, 2019 3:48 pm
Forum: Properties of Light
Topic: Unit for Wavelength
Replies: 34
Views: 139

Re: Unit for Wavelength

The general unit is meters, but it wavelength can usually be put in nanometers
by abby_hagen
Sun Oct 13, 2019 2:29 pm
Forum: Properties of Light
Topic: Large Objects
Replies: 7
Views: 44

Re: Large Objects

So, bigger objects have a wavelength way smaller than 10^-15, so they're not detectable according to de Broglie's equation.
by abby_hagen
Sun Oct 13, 2019 2:28 pm
Forum: Properties of Light
Topic: Rydberg constant
Replies: 7
Views: 53

Re: Rydberg constant

So, when we use the equation, we end by doing Ef-Ei?
by abby_hagen
Sun Oct 13, 2019 2:25 pm
Forum: Properties of Light
Topic: difference between Rydberg equation and De Broglie equation
Replies: 5
Views: 35

Re: difference between Rydberg equation and De Broglie equation

Okay, that makes sense. So, de Broglie's equation shows the relationship of the wavelength, mass, and velocity of a small particle, and Rydberg predicts the energy of an electron moving between energy levels, but only for hydrogen.
by abby_hagen
Sun Oct 13, 2019 2:21 pm
Forum: Properties of Light
Topic: wavelike properties
Replies: 4
Views: 31

Re: wavelike properties

When it says measurable wavelike properties, it just means that it's not smaller than 10^-15, because that's not detectable.
by abby_hagen
Sun Oct 13, 2019 2:13 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Wavelength Plausibility
Replies: 30
Views: 734

Re: Wavelength Plausibility

Okay, so all we have to remember is that the range of visible light is from around 700 nm to 400 nm, and that anything below 10^-15 is not detectable?
by abby_hagen
Sun Oct 13, 2019 2:11 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 90
Views: 19219

Re: Final Jitters

The best thing to do is just prepare as much as you can, and remind yourself that you've done your best. Testing anxiety is the worst, so whenever I get too stressed about it, I just give myself a couple of seconds to stress, and then limit the amount of time I spend worrying over each problem, so t...
by abby_hagen
Thu Oct 03, 2019 10:25 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Avogadro's number
Replies: 9
Views: 76

Re: Avogadro's number

Yeah, it's just 6.022*10^23 number of things
by abby_hagen
Thu Oct 03, 2019 10:23 pm
Forum: Balancing Chemical Reactions
Topic: Fractions in Balancing Equations
Replies: 11
Views: 106

Re: Fractions in Balancing Equations

The answer shouldn't be left in fractions
by abby_hagen
Thu Oct 03, 2019 10:17 pm
Forum: Significant Figures
Topic: Sig Figs of Mass Percentage Composition?
Replies: 3
Views: 37

Re: Sig Figs of Mass Percentage Composition?

Yeah, I think since it's not a measurement that was actually taken in a lab, and more of a given, it's sort of up to you how many significant figures you give it
by abby_hagen
Thu Oct 03, 2019 10:13 pm
Forum: Significant Figures
Topic: Practical Application of Sig Figs?
Replies: 3
Views: 31

Re: Practical Application of Sig Figs?

I think they're basically so that the uncertainty in a study or lab can be communicated
by abby_hagen
Thu Oct 03, 2019 10:12 pm
Forum: Limiting Reactant Calculations
Topic: Homework Week 1
Replies: 18
Views: 159

Re: Homework Week 1

Yeah, you could just choose a random 5 from the problems assigned if you wanted

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