Search found 51 matches

by britthanul234
Mon Dec 02, 2019 11:25 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: J3
Replies: 2
Views: 70

Re: J3

Pink = acidic
Blue = basic
by britthanul234
Mon Dec 02, 2019 11:24 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Anion stability
Replies: 6
Views: 92

Re: Anion stability

The Ka value a constant that determines a strong or weak acid. Higher Ka means stronger acid as a result.
by britthanul234
Mon Dec 02, 2019 11:23 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Today's lecture
Replies: 5
Views: 85

Re: Today's lecture

We basically went over salts as acids and bases.
by britthanul234
Mon Dec 02, 2019 11:22 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strength of bases BrO- and C17H19O3N
Replies: 2
Views: 47

Re: Strength of bases BrO- and C17H19O3N

Weak acid = HBrO
Conjugate base = BrO-
Morphine is basic because the nitrogen has a lone pair, so the compounds will be weak.
by britthanul234
Mon Dec 02, 2019 11:21 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Electronegativity and acid strength
Replies: 5
Views: 73

Re: Electronegativity and acid strength

An acid losing a proton could be made stable through electronegativity. When the resulting anion is made stable, the following reactions will be stable as well. That means that more of the acid will dissociate, release H+ ions. Hence, it would be a stronger acid.
by britthanul234
Mon Nov 25, 2019 12:26 pm
Forum: Naming
Topic: 9C #5
Replies: 3
Views: 54

Re: 9C #5

The question is asking which ligands can attach to multiple bonding sites (polydentate).
Poly- means multiple.
by britthanul234
Mon Nov 25, 2019 12:25 pm
Forum: Naming
Topic: 9C #9c/d
Replies: 3
Views: 31

Re: 9C #9c/d

The abbreviations are just for the ligands.
by britthanul234
Mon Nov 25, 2019 12:24 pm
Forum: Naming
Topic: Roman numerals
Replies: 6
Views: 51

Re: Roman numerals

The oxidation number is the effective charge on an atom in a compound. A larger oxidation number means more oxidation while a lower oxidation number means the opposite, which is reduction.
by britthanul234
Mon Nov 25, 2019 12:23 pm
Forum: Naming
Topic: Di-, Tri-, Tetra- vs Bis-, Tris-, Tetrakis-
Replies: 11
Views: 146

Re: Di-, Tri-, Tetra- vs Bis-, Tris-, Tetrakis-

The prefixes bis-, tris-, and tetrakis- are used when a ligand already has a Greek prefix. It's either that or you use it when the ligand is polydentate.
by britthanul234
Mon Nov 25, 2019 12:22 pm
Forum: Naming
Topic: Correct naming conventions
Replies: 5
Views: 64

Re: Correct naming conventions

Use the suffix -ate if the complex has a negative charge.
by britthanul234
Fri Nov 22, 2019 8:59 am
Forum: Determining Molecular Shape (VSEPR)
Topic: 2E.5
Replies: 5
Views: 67

Re: 2E.5

It would be trigonal planar.
by britthanul234
Fri Nov 22, 2019 8:56 am
Forum: Determining Molecular Shape (VSEPR)
Topic: T-Shaped ??
Replies: 9
Views: 151

Re: T-Shaped ??

AX3E2 and AX3E3 are t-shaped
by britthanul234
Fri Nov 22, 2019 8:56 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Octahedral
Replies: 6
Views: 84

Re: Octahedral

It's because it is in the 3D form not 2D.
by britthanul234
Fri Nov 22, 2019 8:55 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angle of bent
Replies: 17
Views: 242

Re: Bond Angle of bent

If there are 2 lone pairs, then it would be less than 109.5 degrees. If there is 1 lone pair, then it would be less than 120 degrees. Bent shape simply means that there are lone pairs that create a repulsion that allows the bonds to come closer together, allowing for the angles to decrease.
by britthanul234
Wed Nov 13, 2019 11:36 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Kinetic Energy Uncertainty Conversion
Replies: 3
Views: 181

Re: Kinetic Energy Uncertainty Conversion

There are 6.022 x 10^23 electrons in a mol. If you divide by Avagadro's number you get energy per mol.
by britthanul234
Wed Nov 13, 2019 11:35 am
Forum: *Particle in a Box
Topic: Shape of Wavefunction
Replies: 4
Views: 639

Re: Shape of Wavefunction

Wave function = quantum state of a system
Wave function squared = probability
by britthanul234
Wed Nov 13, 2019 11:34 am
Forum: *Particle in a Box
Topic: Application
Replies: 4
Views: 726

Re: Application

When length increases, the energy gap decreases.
by britthanul234
Wed Nov 13, 2019 11:34 am
Forum: *Particle in a Box
Topic: Purpose
Replies: 3
Views: 574

Re: Purpose

It relates to the Schrodiner equation. It's simply a model that explain energy quantization and the mathematical calculations that are involved. It is one of the many models used to explain and solve for values of energy.
by britthanul234
Wed Nov 13, 2019 11:32 am
Forum: *Particle in a Box
Topic: TEST 2
Replies: 14
Views: 442

Re: TEST 2

Test 2 is Week 8 during your discussion class.
by britthanul234
Tue Nov 05, 2019 10:08 pm
Forum: Trends in The Periodic Table
Topic: Run Down of Trends
Replies: 4
Views: 107

Re: Run Down of Trends

Atomic and ionic radius (increases as you go down and left)
Ionization energy and electron affinity (increases as you go up and right).
by britthanul234
Tue Nov 05, 2019 10:07 pm
Forum: Trends in The Periodic Table
Topic: 3rd IE?
Replies: 2
Views: 60

Re: 3rd IE?

Yes, Ca would have the stronger 3rd ionization energy.
by britthanul234
Tue Nov 05, 2019 10:06 pm
Forum: Trends in The Periodic Table
Topic: Atomic Radii
Replies: 10
Views: 250

Re: Atomic Radii

You should know the period trend for atomic radii. It increases as it goes down and left of the periodic table.
by britthanul234
Tue Nov 05, 2019 10:05 pm
Forum: Trends in The Periodic Table
Topic: Electron affinity vs electronegativity
Replies: 7
Views: 91

Re: Electron affinity vs electronegativity

You just need to know the general concept and idea behind it. Know the trends as well.
by britthanul234
Tue Nov 05, 2019 10:05 pm
Forum: Trends in The Periodic Table
Topic: Electronegativity
Replies: 11
Views: 210

Re: Electronegativity

You should know the general periodic trends, which will come in handy in multiple choice questions, as well as drawing Lewis structure questions.
by britthanul234
Sun Oct 27, 2019 9:08 pm
Forum: Trends in The Periodic Table
Topic: Electron affinity.
Replies: 8
Views: 57

Re: Electron affinity.

Electron affinity is the ability for an atom to accept electron. Greater nuclear charge means greater electron affinity.
by britthanul234
Sun Oct 27, 2019 9:01 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: HW 1D.23
Replies: 4
Views: 138

Re: HW 1D.23

l must equal 0 or 1 because n=2 in this case. If l=0 then ml=0, then ml=-1,0,1. Therefore, there are 4 possible orbitals.
by britthanul234
Sun Oct 27, 2019 9:00 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Radial Distribution Function
Replies: 4
Views: 53

Re: Radial Distribution Function

I do not think you are expected to know how to use the radical distribution function.
by britthanul234
Sun Oct 27, 2019 8:59 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: oribital numbers
Replies: 7
Views: 82

Re: oribital numbers

You basically count the number of elements in one row of the period table, then divide that by 2 electrons in order because one orbital can only hold a maximum of 2 electrons.
by britthanul234
Sun Oct 27, 2019 8:57 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Using periodic table to find configurations?
Replies: 3
Views: 57

Re: Using periodic table to find configurations?

Yes, you should be using the periodic table when finding configurations because the way that the periodic table is structured is related to these orbitals and configurations (electrons and whatnot).
by britthanul234
Mon Oct 21, 2019 5:32 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Numbers: Size of An Atom
Replies: 4
Views: 49

Re: Quantum Numbers: Size of An Atom

N is the size and energy of the orbital. As n increases, the distance from nucleus increases, so the size (radius) increases as well.
by britthanul234
Mon Oct 21, 2019 5:31 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Number
Replies: 4
Views: 69

Re: Quantum Number

There's no equation for finding the quantum number.
by britthanul234
Mon Oct 21, 2019 5:30 pm
Forum: Quantum Numbers and The H-Atom
Topic: Schrodinger's wave function
Replies: 3
Views: 69

Re: Schrodinger's wave function

Basically he was referring to the shape of the wave function graph.
by britthanul234
Mon Oct 21, 2019 5:30 pm
Forum: Quantum Numbers and The H-Atom
Topic: Homework Question
Replies: 2
Views: 58

Re: Homework Question

Yup, we're still learning about quantum numbers, so just do the homework problems that we've covered in the lectures.
by britthanul234
Mon Oct 21, 2019 5:29 pm
Forum: Quantum Numbers and The H-Atom
Topic: Spin numbers
Replies: 4
Views: 67

Re: Spin numbers

You can only know whether the electron spins up or down. It is the direction the electron is moving around the nucleus. They spin in opposite directions for the purpose of stability.
by britthanul234
Mon Oct 14, 2019 9:19 am
Forum: Properties of Light
Topic: Constants
Replies: 2
Views: 26

Re: Constants

Planck's constant has to do with the electromagnetic radiation and the photon's energy. Rydberg's constant has to do with the electromagnetic spectra of an atom.
by britthanul234
Mon Oct 14, 2019 9:18 am
Forum: Properties of Light
Topic: MidTerms and Finals
Replies: 11
Views: 131

Re: MidTerms and Finals

I don't think midterms take place in discussion sections because the midterms are longer than 50 minutes. Only the tests are administered in the discussion sections.
by britthanul234
Mon Oct 14, 2019 9:17 am
Forum: Properties of Light
Topic: 1B. 3
Replies: 2
Views: 36

Re: 1B. 3

The answer is (D) photoelectric effect. This best supports the idea that the electromagnetic radiation has properties of particles of energy (photons). Each photon has a fixed energy of E=hv.
by britthanul234
Mon Oct 14, 2019 9:16 am
Forum: Properties of Light
Topic: When to use the Planck's Constant?
Replies: 6
Views: 52

Re: When to use the Planck's Constant?

Planck's constant is basically used whenever the variable "h" appears in a formula. As of now, I feel like it appears when talking about energy emitted or absorbed at n=some energy level or when determining the energy of a photon (E=hv).
by britthanul234
Mon Oct 14, 2019 9:14 am
Forum: Properties of Light
Topic: Angstrom
Replies: 10
Views: 107

Re: Angstrom

Most of the time, people tend to use meters. However, I feel like on tests/exams, the question would specify what unit the final answer should be in. I don't think you need to worry about units too much for these types of problems.
by britthanul234
Tue Oct 08, 2019 4:59 pm
Forum: Properties of Light
Topic: Question 1A.3 c
Replies: 5
Views: 127

Re: Question 1A.3 c

This has to do with the frequency, which you can assume is an oscillation or wave. There are not as much oscillations, so the electrical field will not change as quickly. That is why the answer is what it is.
by britthanul234
Tue Oct 08, 2019 4:57 pm
Forum: Empirical & Molecular Formulas
Topic: empirical to molecular formula [ENDORSED]
Replies: 9
Views: 390

Re: empirical to molecular formula [ENDORSED]

You simply divide the molar mass by the empirical mass.
by britthanul234
Tue Oct 08, 2019 4:56 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molar Mass
Replies: 7
Views: 131

Re: Molar Mass

You just have to use Avogadro's number since the question gives you the weight of the single molecule. Molecule should be a key word that allows you to realize that you should be using Avogadro's number and doing a bunch of various conversions.
by britthanul234
Tue Oct 08, 2019 4:54 pm
Forum: Limiting Reactant Calculations
Topic: Test 1
Replies: 11
Views: 224

Re: Test 1

I think it would be safe for you to know how to solve all of the homework problems assigned.
by britthanul234
Tue Oct 08, 2019 4:53 pm
Forum: Balancing Chemical Reactions
Topic: Combustion
Replies: 17
Views: 585

Re: Combustion

Combustion is simply a compound reacting with O2, creating the products, H20 and CO2. Combustion occurs through burning. Usually the question will specify whether the reaction is a combustion or not.
by britthanul234
Tue Oct 08, 2019 4:52 pm
Forum: Molarity, Solutions, Dilutions
Topic: Polyatomic ions on Test 1
Replies: 4
Views: 101

Re: Polyatomic ions on Test 1

I feel like the test will give you the formula for most of the problems, but basic compounds, like nitrate, you should know just to be safe.
by britthanul234
Tue Oct 01, 2019 8:40 am
Forum: Balancing Chemical Reactions
Topic: Balancing Reactions
Replies: 25
Views: 650

Re: Balancing Reactions

Balancing equations is super important because of the Law of Conservation of Mass (Lavoisier). The total mass before equals the total mass after the reaction. This is because atoms are neither created nor destroyed. Therefore, chemical equations (reactants --> products) must always be balanced.
by britthanul234
Tue Oct 01, 2019 8:38 am
Forum: Significant Figures
Topic: Decimals After Whole Numbers
Replies: 6
Views: 269

Re: Decimals After Whole Numbers

Where the decimal point is placed is super important when it comes to significant figures. 100 would be 1 sig fig because you don't count the zeroes after the 1. However, 100. would be 3 sig figs because you must count all digits that come before the period as long as the digits coming before the de...
by britthanul234
Tue Oct 01, 2019 8:36 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Metal Sulfides and Molar Mass
Replies: 3
Views: 71

Re: Metal Sulfides and Molar Mass

Here, the metal does not refer to a specific metal. The question purposefully leaves the metal unknown in order for us to not know the molar mass of it. Therefore, we need to subtract the molar mass of the (OH)2 from the total molar mass in order to figure out the molar mass of the metal. Then, we a...
by britthanul234
Tue Oct 01, 2019 8:33 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Accuracy vs Precision
Replies: 10
Views: 194

Re: Accuracy vs Precision

I think the best way to think of the difference between accuracy and precision is to visualize the different examples of the target that Professor Lavelle gave during class. Precision is how close the measurement are to one another, so something can be very precise without having to be close to the ...
by britthanul234
Tue Oct 01, 2019 8:25 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Formula Units
Replies: 4
Views: 75

Re: Formula Units

Whenever a question asks you to find the formula units, it's simply asking you to find the number of atoms. So, if the question gives you the number of grams, divide it by the molar mass in order to figure out the number of moles. Then use Avogadro's number to find the number of atoms, which is the ...

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