Search found 29 matches

by Michael_Navarro_1H
Thu Dec 06, 2018 11:07 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pH calculation
Replies: 4
Views: 49

Re: pH calculation

To clarify, if you are dealing with a strong acid, the molarity of the acid will equal the molarity of the H3O+ in solution. So for example, if you were given a solution of HCl with molarity 0.20 M and were asked to calculate the pH of the solution, the molarity of the H3O+ ions in solution would al...
by Michael_Navarro_1H
Thu Dec 06, 2018 11:05 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Anion affecting ph
Replies: 2
Views: 21

Re: Anion affecting ph

The conjugate base of a strong acid is stable as is, so it does not result in the deprotonization of water which would result in a change in pH. However, the conjugate base of a weak acid is unstable and will therefore pull an H+ from H2O to form an acid and OH- in solution, thereby increasing the pH.
by Michael_Navarro_1H
Thu Dec 06, 2018 11:03 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: pKa and Ka
Replies: 3
Views: 68

Re: pKa and Ka

Isn't pKa just calculated by just taking the -log of the Ka value?
by Michael_Navarro_1H
Tue Dec 04, 2018 5:38 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg and Wavelength
Replies: 11
Views: 189

Re: Heisenberg and Wavelength

If a question like this were to come up on the final, I would find an equation where each variable is included and see if there is a way to relate them together that would assist you in answering the question.
by Michael_Navarro_1H
Tue Dec 04, 2018 5:35 pm
Forum: Sigma & Pi Bonds
Topic: Strength of Sigma and Pi Bonds
Replies: 5
Views: 73

Re: Strength of Sigma and Pi Bonds

You can also think of pi bonds as relating to double bonds while sigma bonds only refer to single bonds.
by Michael_Navarro_1H
Sun Dec 02, 2018 8:12 pm
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Bases
Replies: 2
Views: 37

Re: Bases

There are soft salts that dissociates in water that gives water the soapy feel
by Michael_Navarro_1H
Sun Dec 02, 2018 8:03 pm
Forum: Naming
Topic: Complex Ion
Replies: 1
Views: 24

Re: Complex Ion

The only rule you need to know when the complex ion is negative is to add -ate to the end of the metal involved
by Michael_Navarro_1H
Sun Dec 02, 2018 7:56 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Biological Compounds
Replies: 3
Views: 48

Re: Biological Compounds

Since N has the additional lone pair, it acts as a lone pair donor and thus acts as the base in solution,
by Michael_Navarro_1H
Mon Nov 26, 2018 5:58 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Cis and Trans
Replies: 10
Views: 95

Re: Cis and Trans

Being cis or trans is really dependent on the biological function of the molecule. Having a cis configuration is convenient for the cisplatin chemotherapy drug mentioned in class, but for a different compound with a trans configuration, it may prove to be more effective for its function.
by Michael_Navarro_1H
Mon Nov 26, 2018 12:25 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Organic Molecules
Replies: 4
Views: 33

Re: Organic Molecules

usually in any organic molecule, you would be asked to determine the molecular geometry of a specific atom. For most organic compounds, carbon is the central atom with a tetrahedral geometry.
by Michael_Navarro_1H
Mon Nov 26, 2018 12:20 pm
Forum: Hybridization
Topic: When to hybridized?
Replies: 6
Views: 46

Re: When to hybridized?

Hybridization is a way of explaining why certain atoms form the bonds they do -- in the case of Carbon, which only has two unpaired electrons to form bonds, the sp3 hybridization model explains why carbon is capable of forming 4 bonds.
by Michael_Navarro_1H
Sun Nov 11, 2018 5:08 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs
Replies: 7
Views: 83

Re: Lone Pairs

The lone electron pairs have a greater effect on the molecule shape. Looking at H2O for example, we see that the lone pairs on the Oxygen atom changes the shape of water from a theoretical linear geometry to the bent configuration.
by Michael_Navarro_1H
Sun Nov 11, 2018 4:33 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 12
Views: 132

Re: Bond Angles

Knowing bond angles is pretty much a matter of memorization. We'll be going over plenty of examples in class and be exposed to all the molecular geometries within the VSEPR model and their appropriate bond angles.
by Michael_Navarro_1H
Sun Nov 11, 2018 4:20 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Hydrogen Bonding
Replies: 7
Views: 80

Re: Hydrogen Bonding

Attractive energy is just a determinant of the relative strength of a bond in relation to the energy required to break it. The higher the dissociation energy of a bond, the stronger its attractive energy is.
by Michael_Navarro_1H
Fri Nov 02, 2018 4:49 pm
Forum: Electronegativity
Topic: Electronegativity vs. Ionization Energy
Replies: 3
Views: 38

Re: Electronegativity vs. Ionization Energy

When drawing a lewis structure, you really don't have to consider either as much. However, when it comes to resonance, then the electronegativity is important to consider as the most electronegative atoms should be those you place a negative FC on if an overall formal charge of zero is not possible ...
by Michael_Navarro_1H
Fri Nov 02, 2018 4:48 pm
Forum: Resonance Structures
Topic: Polar
Replies: 8
Views: 112

Re: Polar

Usually, you want to keep the negative charges on the most electronegative atoms and keep the other atoms at a FC of 0.
by Michael_Navarro_1H
Fri Nov 02, 2018 4:47 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge
Replies: 11
Views: 158

Re: Formal Charge

No, formal charge is only specific to a single atom within the context of molecule and the involvement of its electrons with other atoms.
by Michael_Navarro_1H
Thu Oct 25, 2018 8:50 pm
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

You can usually determine whether an electronic configuration represents an excited state if the diagram depicts an electron that is not in its appropriate orbital or if it has an irregular spin.
by Michael_Navarro_1H
Thu Oct 25, 2018 8:47 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbital Shape for Larger Quantum Numbers
Replies: 3
Views: 39

Re: Orbital Shape for Larger Quantum Numbers

The f orbital only exists when the principal quantum number (n) is at least 4, allowing for the angular momentum number (l) to be 3.
by Michael_Navarro_1H
Thu Oct 25, 2018 8:42 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Cation/Anion Electron Configuration
Replies: 2
Views: 46

Re: Cation/Anion Electron Configuration

Due to the isoelectronicity principle, we would most likely be given the name of the element and then asked to write the electronic configuration for it.
by Michael_Navarro_1H
Thu Oct 18, 2018 11:09 am
Forum: Quantum Numbers and The H-Atom
Topic: Psi squared meaning
Replies: 4
Views: 95

Re: Psi squared meaning

I wouldn't be too concerned about anything relating to the Schrodinger Wave equation. From what I understand however, psi^2 correlates to the probability density of finding an electron within an orbital.
by Michael_Navarro_1H
Thu Oct 18, 2018 10:53 am
Forum: DeBroglie Equation
Topic: Wave properties
Replies: 3
Views: 55

Re: Wave properties

The De Broglie equation can only be applied to objects with very small mass (such as an electron), moving at a considerable speed in order for a detectable wavelength to result. All matter moves at a wavelength, but only matter with a small mass can be detected.
by Michael_Navarro_1H
Thu Oct 18, 2018 10:50 am
Forum: *Shrodinger Equation
Topic: Schrodinger's Equation
Replies: 2
Views: 46

Re: Schrodinger's Equation

Essentially, the Schrodinger's Equation allows us to have a mathematical representation for each type of orbital (s,p,d,f) that correlates to their shapes in 3D space
by Michael_Navarro_1H
Wed Oct 10, 2018 4:35 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg formula
Replies: 1
Views: 16

Re: Rydberg formula

I would use that equation to calculate frequency and then from there stick with v=c/λ or λ=c/v to determine wavelength.
by Michael_Navarro_1H
Wed Oct 10, 2018 4:31 pm
Forum: DeBroglie Equation
Topic: de Broglie Relationship
Replies: 3
Views: 74

Re: de Broglie Relationship

Dr. Lavelle posted a file on his website that contains a whole list of constants that will be useful throughout the quarter--the mass of an electron in addition to everything he has/will cover should be on there.
by Michael_Navarro_1H
Wed Oct 10, 2018 4:28 pm
Forum: Properties of Electrons
Topic: Kinetic energy
Replies: 4
Views: 75

Re: Kinetic energy

For our purposes I think the only way to determine the velocity of an electron other than a detector is by utilizing the equation provided to us in class: E(photon) - E(energy remove e-) = 1/2mv^2
by Michael_Navarro_1H
Fri Oct 05, 2018 4:32 pm
Forum: SI Units, Unit Conversions
Topic: Unit Conversions [ENDORSED]
Replies: 3
Views: 67

Re: Unit Conversions [ENDORSED]

As long as you set up conversion questions using dimensional analysis, you should be ready to tackle any problem on the test.
by Michael_Navarro_1H
Mon Oct 01, 2018 5:52 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactants Post- Module
Replies: 2
Views: 42

Re: Limiting Reactants Post- Module

Typically, chemistry questions throw in extraneous information such as the temperature and pressure as a means to distract students from focusing on only the necessary information. In a question such as this, you should know that only the stoichiometric co-efficients as well as the mass of CaCO3 use...
by Michael_Navarro_1H
Mon Oct 01, 2018 12:46 pm
Forum: SI Units, Unit Conversions
Topic: Week 1 Homework Assignment [ENDORSED]
Replies: 16
Views: 329

Week 1 Homework Assignment [ENDORSED]

Is the homework for this week just to do 7 problems listed in the "Review of Chemical and Physical Principles" unit?

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