Search found 50 matches
- Sun Dec 08, 2019 8:13 am
- Forum: Naming
- Topic: ion at end of name
- Replies: 4
- Views: 423
Re: ion at end of name
We put "ion" at the end of the name because there is nothing attached to the complex.
- Sun Dec 08, 2019 8:12 am
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Strong Acids
- Replies: 2
- Views: 192
Re: Strong Acids
It's helpful to memorize the list of strong acids: HBr, HI, HCl, HNO3, H2SO4, HClO4, HClO3
- Sun Dec 08, 2019 8:10 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentate
- Replies: 3
- Views: 314
Polydentate
How do you identify if something is polydentate?
- Sun Dec 08, 2019 8:09 am
- Forum: Lewis Acids & Bases
- Topic: Strong Acid
- Replies: 2
- Views: 279
Strong Acid
Why is H4O a stronger acid that H3CHO?
Naming
When do we use the prefixes bis-, tris-, tetrakis-, etc.?
- Sun Dec 01, 2019 2:53 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Kb
- Replies: 2
- Views: 163
Kb
How do you calculate Kb? Is it the recipricol of Ka?
- Sun Dec 01, 2019 2:50 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Water
- Replies: 5
- Views: 327
Water
Why is water left out of calculating Ka?
- Sun Dec 01, 2019 2:35 pm
- Forum: Lewis Acids & Bases
- Topic: Define Acid and Base
- Replies: 7
- Views: 748
Re: Define Acid and Base
IF you're just considering the Lewis definition, a Lewis acid is an electron pair acceptor and a Lewis base is an electron pair donor.
- Sun Dec 01, 2019 2:25 pm
- Forum: Sigma & Pi Bonds
- Topic: Ionic bond --> sigma and pi bonds
- Replies: 8
- Views: 1496
Re: Ionic bond --> sigma and pi bonds
Sigma bonds are formed by the overlapping of orbitals, while ionic compounds are formed with the exchange of electrons. So an ionic bond is essentially an electrostatic attraction.
- Sun Dec 01, 2019 2:10 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: pKa
- Replies: 4
- Views: 216
Re: pKa
An acid dissociation constant, Ka, is a quantitative measure of the strength of an acid in solution. The pKa is the negative log of this quantity.
- Sun Nov 24, 2019 1:54 pm
- Forum: Hybridization
- Topic: Single Electron Orbitals
- Replies: 2
- Views: 210
Single Electron Orbitals
Why do single electron orbitals remain unhybridized if they don't participate in bonding while lone pairs of electrons have their own hybridized orbitals?
- Sun Nov 24, 2019 1:52 pm
- Forum: Hybridization
- Topic: Lone pairs
- Replies: 9
- Views: 549
Lone pairs
Since lone pairs of electrons don't contribute in the bonding, why do they form hybrid orbitals?
- Sun Nov 24, 2019 1:49 pm
- Forum: Sigma & Pi Bonds
- Topic: Orbital overlap
- Replies: 4
- Views: 297
Orbital overlap
What is a head-on overlap of orbitals? How is different from just saying an overlap of orbitals?
- Sun Nov 24, 2019 1:41 pm
- Forum: Hybridization
- Topic: sp3 hybridization
- Replies: 1
- Views: 199
sp3 hybridization
How is sp3 hybridization energetically favorable for the atom if it involves the promotion of an electron from a lower energy s orbital to a higher energy sp3 hybridized orbital?
- Sun Nov 24, 2019 1:40 pm
- Forum: Hybridization
- Topic: d-orbitals
- Replies: 7
- Views: 619
d-orbitals
Do the d-orbitals ever get involved in the hybridization?
- Sun Nov 17, 2019 12:47 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone Pairs
- Replies: 5
- Views: 289
Lone Pairs
For species that have lone pairs, can their molecular geometry only be v-shaped or trigonal pyramidal?
- Sun Nov 17, 2019 12:45 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Determining Polarity
- Replies: 3
- Views: 224
Re: Determining Polarity
You can observe the shape of the molecule using the Lewis structure and if there is an uneven distribution of charge (i.e the shape is not symmetrical) then it is polar.
- Sun Nov 17, 2019 12:41 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Repulsion Strength
- Replies: 4
- Views: 232
Repulsion Strength
What is the difference between the strength of repulsion among lone pair-lone pair and just a lone pair?
- Sun Nov 17, 2019 12:34 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angles for Seesaw Shape
- Replies: 2
- Views: 169
Re: Bond Angles for Seesaw Shape
Also the axial bond angle remains to be 180 degrees, despite the lone pair.
- Sun Nov 17, 2019 12:14 pm
- Forum: Lewis Structures
- Topic: Carbon Monoxide
- Replies: 4
- Views: 314
Carbon Monoxide
Could someone explain why CO has a triple bond instead of a double bond?
- Sun Nov 10, 2019 6:27 pm
- Forum: Dipole Moments
- Topic: Electronegativity
- Replies: 3
- Views: 190
Electronegativity
What's the difference between electronegativity and dipole-dipole attraction?
- Sun Nov 10, 2019 6:26 pm
- Forum: Dipole Moments
- Topic: Temporary Dipole Moment
- Replies: 3
- Views: 251
Temporary Dipole Moment
What exactly is a temporary dipole moment? Why is it temporary?
- Sun Nov 10, 2019 6:24 pm
- Forum: Resonance Structures
- Topic: Orbitals
- Replies: 4
- Views: 350
Orbitals
What's happening with the orbitals when electrons are delocalized?
- Sun Nov 10, 2019 6:23 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Partial Charge
- Replies: 2
- Views: 188
Partial Charge
What is the difference between formal charge and partial charge?
- Sun Nov 10, 2019 6:22 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Calculating formal charge
- Replies: 4
- Views: 225
Calculating formal charge
Why is that when we count the total number of valence electrons, we count the two electrons in the covalent bond as if either atom has both of them when we consider the octet rule, but when we calculate formal charge, we only count one of the two electrons in the covalent bond?
- Sun Nov 03, 2019 1:00 pm
- Forum: Dipole Moments
- Topic: Hydrogen Bond
- Replies: 7
- Views: 384
Hydrogen Bond
What is the difference between a hydrogen bond and a dipole attraction?
- Sun Nov 03, 2019 12:54 pm
- Forum: Sigma & Pi Bonds
- Topic: Sigma and Pi Bonds
- Replies: 3
- Views: 216
Re: Sigma and Pi Bonds
Sigma and Pi bonds make up a double bond. The main difference between the two is that the pi bond is responsible for resonance, whereas the sigma bond's location doesn't change.
- Sun Nov 03, 2019 12:50 pm
- Forum: Electronegativity
- Topic: Electron Affinity
- Replies: 3
- Views: 109
Electron Affinity
What is the difference between electronegativity and electron affinity?
- Sun Nov 03, 2019 12:48 pm
- Forum: Electronegativity
- Topic: Measuring Electronegativity
- Replies: 4
- Views: 344
Measuring Electronegativity
Is electronegativity measurable, or is it just seen as relative to other atoms?
- Sun Nov 03, 2019 12:42 pm
- Forum: Ionic & Covalent Bonds
- Topic: Relationship with Polarity
- Replies: 3
- Views: 123
Relationship with Polarity
How does polarity and ionicity relate to each other?
- Fri Oct 25, 2019 4:57 pm
- Forum: Lewis Structures
- Topic: Steps to drawing a structure
- Replies: 5
- Views: 194
Steps to drawing a structure
Why does the least electronegative atom belong in the the center when drawing the structures?
- Fri Oct 25, 2019 4:51 pm
- Forum: Trends in The Periodic Table
- Topic: Electronegativity
- Replies: 3
- Views: 198
Electronegativity
What makes certain atoms more electronegative?
- Fri Oct 25, 2019 4:48 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Resonance
- Replies: 1
- Views: 129
Resonance
Can we assume that every molecule with an element with a lone pair of electrons next to a pi bond will always form resonance structures?
- Fri Oct 25, 2019 4:43 pm
- Forum: Octet Exceptions
- Topic: Valence electrons for atomic numbers after 20
- Replies: 2
- Views: 94
Re: Valence electrons for atomic numbers after 20
You only count the s- and p- orbitals to find the valence electrons, not the d-orbital
- Fri Oct 25, 2019 4:16 pm
- Forum: Lewis Structures
- Topic: Single or Double Bonds
- Replies: 4
- Views: 127
Re: Single or Double Bonds
You count the number of valence electrons and follow the octet rule. Another way to do it would be to calculate the formal charge on each atom.
- Sun Oct 20, 2019 3:33 am
- Forum: Photoelectric Effect
- Topic: Work Function
- Replies: 9
- Views: 584
Work Function
What is the difference between the work function and the threshold frequency?
- Sun Oct 20, 2019 3:26 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Overlapping
- Replies: 4
- Views: 162
Overlapping
Do orbitals overlap? If they do overlap is there double probability of finding electrons in those regions?
- Sun Oct 20, 2019 3:20 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: p- orbital
- Replies: 3
- Views: 119
p- orbital
If the p-orbitals involves the dumbbell shape in all three axes, which axis is filled with electrons first?
- Sun Oct 20, 2019 3:14 am
- Forum: *Shrodinger Equation
- Topic: Wave Function
- Replies: 3
- Views: 113
Wave Function
Does the wave function also apply to photons?
- Sun Oct 20, 2019 3:05 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Structure of electrons
- Replies: 5
- Views: 167
Structure of electrons
I'm confused about the differences between orbitals and sub-shells or sub-energy levels. Are they interchangeable terms or completely different parts of the atom?
- Sun Oct 13, 2019 2:11 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Atomic spectra
- Replies: 1
- Views: 64
Atomic spectra
Do all elements have line spectrums or can elements also have continuous spectrums?
- Sun Oct 13, 2019 1:58 pm
- Forum: Properties of Light
- Topic: Speed of Light
- Replies: 3
- Views: 108
Speed of Light
If light has different speeds depending on the medium it is in, does it change wavelength, frequency, or both?
- Sun Oct 13, 2019 1:56 pm
- Forum: Properties of Light
- Topic: EM waves
- Replies: 3
- Views: 131
EM waves
Are EM waves the energy itself or the disturbance in electromagnetic field caused by energy (like throwing a stone into a pond and wave forms)?
- Sun Oct 13, 2019 1:40 pm
- Forum: *Black Body Radiation
- Topic: Black Body Radiation
- Replies: 12
- Views: 690
Re: Black Body Radiation
A black body absorbs all radiation, and its emissions depends on its temperature. The emissions are called black body radiation.
- Sun Oct 13, 2019 1:26 pm
- Forum: General Science Questions
- Topic: Diffraction
- Replies: 1
- Views: 178
Diffraction
This might be more physics related, but can someone explain how the minima and maxima work in single and double slit diffraction? How is there both constructive and destructive interference?
- Sat Oct 05, 2019 7:00 pm
- Forum: Empirical & Molecular Formulas
- Topic: Diatomic Molecules Vs. Ions
- Replies: 2
- Views: 134
Re: Diatomic Molecules Vs. Ions
Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Iodine, and Bromine are always diatomic.
- Fri Oct 04, 2019 11:38 am
- Forum: Empirical & Molecular Formulas
- Topic: E.11
- Replies: 1
- Views: 151
E.11
The nuclear power industry extracts 6Li but not 7Li from natural samples of lithium. As a result, the molar mass of commercial samples of lithium is increasing. The current abundances of the two isotopes are 7.42% and 92.58%, respectively, and the masses of their atoms are 9.988 * 10^24 g and 1.165 ...
- Fri Oct 04, 2019 11:31 am
- Forum: General Science Questions
- Topic: Kelvin
- Replies: 3
- Views: 170
Kelvin
What does it mean when we say that 0 Kelvin is absolute zero?
- Fri Oct 04, 2019 11:19 am
- Forum: Limiting Reactant Calculations
- Topic: Study Strategies/Youtube Videos
- Replies: 14
- Views: 543
Re: Study Strategies/Youtube Videos
Abigail Giordano records all of her classes and posts them on Youtube. She's a great teacher and she walks through the entire AP Chem textbook, so it's a good resource if you want to review that sort of material.
- Fri Oct 04, 2019 11:09 am
- Forum: Empirical & Molecular Formulas
- Topic: Order of elements in formulas
- Replies: 5
- Views: 368
Order of elements in formulas
When given elements in formulas, such as carbon, nitrogen, oxygen, and hydrogen, how do you know which order the elements should go in? For example, how do you know if it's CHNO or CNOH or something similar?