Search found 30 matches

by Sydney Aurelio_Dis4B
Tue Dec 04, 2018 12:45 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent vs angular?
Replies: 15
Views: 218

Re: Bent vs angular?

Bent and angular are the same shape. However my TA said that for exams to use the term angular since that is the common term used in the textbook and practice problems
by Sydney Aurelio_Dis4B
Tue Dec 04, 2018 12:36 am
Forum: Lewis Acids & Bases
Topic: Determining Acidity or Basic
Replies: 2
Views: 67

Re: Determining Acidity or Basic

Also often times when given the formula of the compound the acids will start with an H (ex.HCl) and the base will end with an OH (ex. KOH)
by Sydney Aurelio_Dis4B
Tue Dec 04, 2018 12:02 am
Forum: Naming
Topic: Anions
Replies: 3
Views: 56

Re: Anions

Also when naming coordinate compounds for Anions ending with -ite its Ligand name would end with an "-O" (ex Cl- -> Chloro) and if it ends with -ate its Ligand name would end with "-ato" (ex Nitrate-> Nitrato)
by Sydney Aurelio_Dis4B
Mon Dec 03, 2018 11:54 pm
Forum: SI Units, Unit Conversions
Topic: bond angles
Replies: 5
Views: 298

Re: bond angles

@taywebb Yes if there is a lone pair on the central atom it would make the bond angles slightly less than the standard. This is because the lone pairs repel the other atoms away from itself making their bond angles slightly smaller
by Sydney Aurelio_Dis4B
Mon Dec 03, 2018 11:43 pm
Forum: Naming
Topic: Coming up with formula from name
Replies: 3
Views: 58

Re: Coming up with formula from name

The order for writing formulas from name is 1.) Metal 2.) Anionic Molecule (in alphabetical order) 3.) Neutral molecule
by Sydney Aurelio_Dis4B
Mon Dec 03, 2018 11:14 pm
Forum: Bronsted Acids & Bases
Topic: Water and Bronsted Acids/Bases
Replies: 2
Views: 50

Re: Water and Bronsted Acids/Bases

Water can be in other reactions but the reason that it is frequently seen in Bronsted Acid and Base problems is because water is amphoteric, meaning that it can act as either a Bronsted Acid or Base.
by Sydney Aurelio_Dis4B
Mon Dec 03, 2018 11:05 pm
Forum: Lewis Structures
Topic: Acid Base Lewis Structures
Replies: 2
Views: 70

Re: Acid Base Lewis Structures

You would still follow Lewis Structure rules to determine where to add the hydrogen. Satisfy the octet rule (if its not an exception) and check the formal charges of the atoms ( try to get them to equal zero). In the case of HClO2 adding the hydrogen atom to the oxygen instead of the Cl makes Oxygen...
by Sydney Aurelio_Dis4B
Mon Dec 03, 2018 10:58 pm
Forum: Conjugate Acids & Bases
Topic: conjugate acids
Replies: 3
Views: 73

Re: conjugate acids

Whenever you need to determine the conjugate acid of a base you add one H+. This is because conjugate acids accept an H+ from the conjugate base. Therefore it would be CH3NH3+.
by Sydney Aurelio_Dis4B
Mon Dec 03, 2018 10:39 pm
Forum: Lewis Acids & Bases
Topic: Acids?
Replies: 2
Views: 57

Re: Acids?

Weak acids are characterized by short strong bonds. Strong Acids are characterized by longer weaker bonds. This is because if the bond is weaker/less stable it is more likely to donate an H+ which makes it a strong acid.
by Sydney Aurelio_Dis4B
Mon Dec 03, 2018 10:34 pm
Forum: Conjugate Acids & Bases
Topic: Conjugate Acids and Bases in this formula
Replies: 1
Views: 42

Re: Conjugate Acids and Bases in this formula

NH3 in this case would be a conjugate Base because it lost an H+ (from NH4->NH3) and H3O+ would be a conjugate Acid because it gained an H+ ( from H20-> H30+)
by Sydney Aurelio_Dis4B
Mon Dec 03, 2018 10:29 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Water as a Monodentate
Replies: 1
Views: 54

Re: Water as a Monodentate

Water is Monodentate due to orbital geometry. Although there are two lone pairs on the Oxygen instead of one, but only one lone pair has the correct orientation to bond making water monodentate
by Sydney Aurelio_Dis4B
Mon Nov 26, 2018 12:20 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Like dissolves like
Replies: 3
Views: 80

Re: Like dissolves like

Non polar solutes dissolve in non polar solvents, due to London Dispersion Forces. The reason as to why non polar solutes won't dissolve in polar solvents is that the London Dispersion forces in non polar molecules are much weaker in comparison to to the polar attractions between the permanent dipol...
by Sydney Aurelio_Dis4B
Mon Nov 26, 2018 12:06 am
Forum: Determining Molecular Shape (VSEPR)
Topic: pi-bonds
Replies: 7
Views: 96

Re: pi-bonds

duverge_maciel wrote:Why do pi bonds not allow bound atoms to rotate?

Pi bonds do not allow bound atoms to rotate because rotating the atoms weakens the pi bonds. Pi bonds are the strongest when the p orbitals between atoms are parallel.
by Sydney Aurelio_Dis4B
Mon Nov 26, 2018 12:01 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape
Replies: 4
Views: 74

Re: Molecular Shape

Yes you should continue to use formal charge, in order to draw the favored Lewis Structure, and in doing so it will help you correctly identify its shape based on lone pairs and they way the atoms are bonded
by Sydney Aurelio_Dis4B
Sun Nov 11, 2018 10:37 pm
Forum: Ionic & Covalent Bonds
Topic: Bonding
Replies: 2
Views: 80

Re: Bonding

The stronger interactions are referring to Dipole-Dipole interactions not necessarily bonds. Strength of a bond is determined by its Dissociation energy while interaction strength is determined by atom polarizability. Larger atoms have stronger interactions because their electron clouds can be more ...
by Sydney Aurelio_Dis4B
Sun Nov 11, 2018 10:24 pm
Forum: Dipole Moments
Topic: dipole distance
Replies: 3
Views: 66

Re: dipole distance

The bond lengths are related to the strength of a bond. A bond between larger atoms have a longer bond length or larger distance have a weaker bond. Atoms with shorter bond lengths have stronger, harder to break bonds
by Sydney Aurelio_Dis4B
Sun Nov 11, 2018 10:21 pm
Forum: Dipole Moments
Topic: Dipoles
Replies: 2
Views: 48

Re: Dipoles

In a bond with a more electronegative atom and a less electronegative atom the electrons will be more attracted to the atom with a higher electronegativity. As a result the more electronegative atom gains a partially negative charge and the less electronegative atom gains a partially positive charge
by Sydney Aurelio_Dis4B
Sun Nov 11, 2018 9:49 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: London Forces
Replies: 2
Views: 43

Re: London Forces

Every molecule experiences London Forces because electrons are constantly moving. When electrons accumulate on one side of a molecule it creates temporary dipoles. The temporary positive dipole of one molecule gets attracted to another temporary negative dipole of another molecule and create what we...
by Sydney Aurelio_Dis4B
Sun Nov 04, 2018 9:53 pm
Forum: Electronegativity
Topic: Electronegativity
Replies: 5
Views: 94

Re: Electronegativity

Electronegativity is a measure of how likely an atom can attract another electron. Understanding it is important because the difference in electronegativity between atoms can determine what kind of bond it has and how those electrons are shared.
by Sydney Aurelio_Dis4B
Sun Nov 04, 2018 9:46 pm
Forum: Lewis Structures
Topic: double bonds
Replies: 2
Views: 37

Re: double bonds

Not necessarily in all cases, but in many cases it is oxygen that double bonds to the central atom, when double bonds need to be added
by Sydney Aurelio_Dis4B
Sun Nov 04, 2018 9:42 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: When to multiply by 2
Replies: 5
Views: 274

Re: When to multiply by 2

If you are referring to a question like on test 2 #2. You multiply momentum by a certain factor, ex) 2. when the problem says "The uncertainty in the momentum of a ball is 2 times its momentum" In that sort of example you would calculate the momentum, then multiply that value by 2 to get t...
by Sydney Aurelio_Dis4B
Sun Oct 21, 2018 9:15 pm
Forum: Quantum Numbers and The H-Atom
Topic: Electron Spin
Replies: 3
Views: 64

Re: Electron Spin

The +1/2 indicates an atom with one type of electron spin and the -1/2 indicates atoms with another type of electron spin. And they signify a direction of the spin (either spin up or spin down).
by Sydney Aurelio_Dis4B
Wed Oct 17, 2018 2:29 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Wavelengths
Replies: 5
Views: 116

Re: Wavelengths

A wavelength can be negative when you are referring to direction of the wave. However, in the types of problems we are doing now we are mainly concerned with photons and photons can not have a negative wavelength.
by Sydney Aurelio_Dis4B
Wed Oct 17, 2018 2:21 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Equation
Replies: 2
Views: 52

Re: Rydberg Equation

In my discussion, we discussed this and one of the main reasons why they dont want us to use the Rydberg equation is because many times they will plug the wrong "n" into the equation. However, they still want us to have a basic understanding of how to use it. One way to check if your answe...
by Sydney Aurelio_Dis4B
Mon Oct 15, 2018 12:13 am
Forum: DeBroglie Equation
Topic: Particle wave duality
Replies: 3
Views: 106

Re: Particle wave duality

The detectability of a wavelike properties is dependent upon the wavelength of that object. In lecture the Professor stated that any wavelength smaller than 10^-18m can most likely not be detected. The greater the mass of an object, the less likely that its wavelength will be detected because mass a...
by Sydney Aurelio_Dis4B
Sun Oct 14, 2018 11:54 pm
Forum: DeBroglie Equation
Topic: detectability of waves
Replies: 4
Views: 85

Re: detectability of waves

Anything less than 10^-18 does not have any measurable wave like properties. Everything does have wave like properties, but they can only be detected for very small objects in motion. The 10^-12M is referring to the wavelength of an electron and one angstrom would be 10^-10 m
by Sydney Aurelio_Dis4B
Tue Oct 09, 2018 11:14 pm
Forum: SI Units, Unit Conversions
Topic: Ways to remember prefixes
Replies: 7
Views: 580

Re: Ways to remember prefixes

An easy way to remember prefixes is this saying " The Great Monarch King Henry Died drinking chocolate milk monday night peacefully" T: Tera --- G: Giga--- M: Mega--- K: Kilo--- H:Hecta--- D: Deca --- BASE--- d: deci--- c: centi --- m: mili--- m: micro--- n: nano--- p: pico 10^12 --- 10^9 ...
by Sydney Aurelio_Dis4B
Sat Oct 06, 2018 1:10 pm
Forum: SI Units, Unit Conversions
Topic: Formula Units?
Replies: 3
Views: 66

Re: Formula Units?

I believe formula units would be the amount of moles of that compound, multiplied by Avogadro's number
by Sydney Aurelio_Dis4B
Sat Oct 06, 2018 12:40 pm
Forum: Limiting Reactant Calculations
Topic: Finding Limiting Reactants
Replies: 3
Views: 56

Re: Finding Limiting Reactants

The limiting reactant is the reactant that's actual amount (in moles) is less than the theoretical amount of that reactant needed (in moles). You would pick one reactant and then use stoichiometry to find the theoretical amount of the other reactant. If the actual amount in moles of one reactant is ...
by Sydney Aurelio_Dis4B
Tue Oct 02, 2018 2:12 pm
Forum: Empirical & Molecular Formulas
Topic: Determining the Number of Atoms for the Empirical Formula
Replies: 2
Views: 80

Re: Determining the Number of Atoms for the Empirical Formula

Yes, when a number can be rounded from the hundredth's place it is okay to round up or down to a whole number (ex: 4.03 can be rounded to 4, and 3.98 can be rounded to 4). However if a number can't be rounded from the hundredth's place to reach a whole number, then it should be multiplied by a facto...

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