Search found 29 matches

by Richard Ku 4H
Sat Dec 08, 2018 2:50 am
Forum: Bronsted Acids & Bases
Topic: H2PO4 -
Replies: 3
Views: 42

Re: H2PO4 -

H2PO4- is not amphiprotic, but HPO42- is amphiprotic
by Richard Ku 4H
Sat Dec 08, 2018 2:47 am
Forum: Naming
Topic: churro 31
Replies: 4
Views: 58

Re: churro 31

It is [Ni(NH3)5(NO2)]2+
by Richard Ku 4H
Sat Dec 08, 2018 2:47 am
Forum: Amphoteric Compounds
Topic: Amphiprotic vs. Amphoteric
Replies: 7
Views: 97

Re: Amphiprotic vs. Amphoteric

Amphiprotic means it is able to donate or accept electrons, where amphoteric means it is able to act as either an acid or base.
by Richard Ku 4H
Sat Dec 08, 2018 2:44 am
Forum: Calculating the pH of Salt Solutions
Topic: Atoms that don't affect pH
Replies: 3
Views: 52

Re: Atoms that don't affect pH

Br is considered a spectator ion, and would not affect the formation of H+ or OH- ions, and hence would not affect the pH of the solution.
by Richard Ku 4H
Sat Dec 08, 2018 2:43 am
Forum: Lewis Acids & Bases
Topic: H-
Replies: 3
Views: 38

Re: H-

H- would be able to accept a proton, and hence would be a Bronsted base. However, it could also donate electrons so would also be considered a lewis Base
by Richard Ku 4H
Sat Dec 08, 2018 2:39 am
Forum: Dipole Moments
Topic: churro 38
Replies: 3
Views: 54

Re: churro 38

The mass of the molecule with Se is much greater, and hence will experience a greater level of London dispersion forces. Mass and London dispersion forces are proportional.
by Richard Ku 4H
Sat Dec 08, 2018 2:38 am
Forum: Properties of Light
Topic: Electromagnetic Radiation and Speed
Replies: 2
Views: 39

Re: Electromagnetic Radiation and Speed

In terms of De Brogile's equation, wavelength and velocity are inversely proportional. Other than that, speed of all waves should be the same (3x10^8ms-1).
by Richard Ku 4H
Sat Dec 08, 2018 2:31 am
Forum: Resonance Structures
Topic: Bond Lengths
Replies: 1
Views: 37

Re: Bond Lengths

In resonance structures, the electrons of the pi bonds in double bonds are delocalized, meaning they move over the entire atom. This means the delocalized electron is shared between all bonds, resulting in equal bond lengths and strengths.
by Richard Ku 4H
Sat Dec 08, 2018 2:25 am
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Ka and Kb on Final
Replies: 9
Views: 147

Re: Ka and Kb on Final

We will not need to know Ka and Kb values for the final. This will be covered in 14B. The only acids and bases calculations we will do is for pH.
by Richard Ku 4H
Sat Dec 08, 2018 2:24 am
Forum: Naming
Topic: Anionic complex name
Replies: 2
Views: 23

Re: Anionic complex name

Generally, these are the most common transition metals that will appear. The metals you have listed will suffice, and any other compounds with a negative charge will just require an "ate" at the end.
by Richard Ku 4H
Sat Dec 08, 2018 2:23 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: -dentate of Ligands
Replies: 1
Views: 21

Re: -dentate of Ligands

It is determined by how many sites/bonds the ligand attaches to the central metal atom. So 1 would be mono, 2 would be bi, 3 would be tri and so on.
by Richard Ku 4H
Sat Dec 08, 2018 2:21 am
Forum: Naming
Topic: confusion name to formula
Replies: 4
Views: 53

Re: confusion name to formula

You are correct. The overall charge of the compound will be neutral, and so since potassium has a 3+ charge, the overall charge of the complex will be -3, and hence end in "ate"
by Richard Ku 4H
Sat Dec 08, 2018 2:19 am
Forum: Naming
Topic: order of ligands when going from name to formula
Replies: 3
Views: 42

Re: order of ligands when going from name to formula

List them in alphabetical order of the first letter of each ligand
by Richard Ku 4H
Sun Dec 02, 2018 11:46 pm
Forum: Amphoteric Compounds
Topic: Amphoteric compounds besides water
Replies: 6
Views: 64

Re: Amphoteric compounds besides water

Aluminium Oxide (Al2O3) is another amphoteric compound. It is able to have reactions where it acts as an acid or base, depending on the other species it is reacting with.
by Richard Ku 4H
Sun Dec 02, 2018 11:43 pm
Forum: Hybridization
Topic: Hybridization
Replies: 11
Views: 92

Re: Hybridization

Trigonal planar is sp^2
by Richard Ku 4H
Sun Dec 02, 2018 11:41 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Water
Replies: 4
Views: 35

Re: Water

It's neutral because it is amphoteric and can accept or donate a proton
by Richard Ku 4H
Sat Nov 24, 2018 12:05 am
Forum: Dipole Moments
Topic: Polarity
Replies: 4
Views: 65

Re: Polarity

The polarity of water results in partial charges on the oxygen and hydrogen atoms. This means they can form electrostatic attractions between the polar solute and water, hence dissolve the particles.
by Richard Ku 4H
Sat Nov 24, 2018 12:03 am
Forum: Electronegativity
Topic: Largest Electronegativity
Replies: 4
Views: 41

Re: Largest Electronegativity

Fluorine would have the largest electronegativity. Electronegativity increases when going up a group, and when going from left to right on the periodic table.
by Richard Ku 4H
Sat Nov 24, 2018 12:02 am
Forum: Hybridization
Topic: double bonds
Replies: 14
Views: 144

Re: double bonds

A single bond consists of a sigma bond. A double bond consists of a sigma and a pi bond, where the electron density is above and below the internuclear axis
by Richard Ku 4H
Sun Nov 11, 2018 2:34 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Isoelectronic
Replies: 14
Views: 400

Re: Isoelectronic

Isoelectric means 2 atoms that share the same electron configuration of the outermost shell (share the same number of valence electrons)
by Richard Ku 4H
Sun Nov 11, 2018 2:33 am
Forum: Dipole Moments
Topic: Induced-Dipole Induced-Dipole
Replies: 5
Views: 199

Re: Induced-Dipole Induced-Dipole

An induced dipole results in randomly moving electrons in an atom suddenly accumulating on one side of an atom, resulting in a negative charge. This will "induce" a positive charge on one side of an adjacent atom, and hence result in an instantaneous dipole. This effect will cascade to adj...
by Richard Ku 4H
Sun Nov 11, 2018 2:31 am
Forum: Dipole Moments
Topic: induced-dipole
Replies: 3
Views: 210

Re: induced-dipole

Induced dipoles result from randomly moving electrons in an atom forming a temporary negative charge on one side of the atom. As a result, this temporary charge will "induce" a positive charge on one side of an adjacent atom, and hence result in an instantaneous dipole.
by Richard Ku 4H
Sun Nov 04, 2018 10:42 pm
Forum: Properties of Electrons
Topic: Electron Configuration
Replies: 7
Views: 83

Re: Electron Configuration

Yes, because the atom would be more stable if the entire of an orbital is filled out rather than partially filled.
by Richard Ku 4H
Sun Nov 04, 2018 10:40 pm
Forum: Resonance Structures
Topic: Resonance Structures
Replies: 3
Views: 58

Re: Resonance Structures

Yes. It is best to draw all resonance structure for safety reasons.
by Richard Ku 4H
Sun Nov 04, 2018 10:39 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Ionization Energies
Replies: 4
Views: 40

Re: Ionization Energies

Yes, because the effective nuclear charge increases after removing the first electron.
by Richard Ku 4H
Fri Oct 26, 2018 2:07 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Ground state vs. excited state
Replies: 5
Views: 95

Re: Ground state vs. excited state

Excited state atoms absorb energy and are promoted to higher energy levels, making them unstable. This means they experience an increase in the electron shell they occupy. Ground state electrons are just electrons that have not been excited.
by Richard Ku 4H
Fri Oct 26, 2018 2:05 am
Forum: SI Units, Unit Conversions
Topic: Sig Figs
Replies: 8
Views: 229

Re: Sig Figs

You round your answer to the lowest number of significant figures that are present in the given numerical values from the question.
by Richard Ku 4H
Fri Oct 26, 2018 2:01 am
Forum: SI Units, Unit Conversions
Topic: What Unit of Mass to Use?
Replies: 5
Views: 177

Re: What Unit of Mass to Use?

Kilograms (kg) is the SI unit for mass equations. However, mass will only be used to molar calculations. If you are given grams, often times you will need to convert it to kilograms.

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