Pink = acidic
Blue = basic
Search found 51 matches
- Mon Dec 02, 2019 11:25 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: J3
- Replies: 2
- Views: 177
- Mon Dec 02, 2019 11:24 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Anion stability
- Replies: 6
- Views: 448
Re: Anion stability
The Ka value a constant that determines a strong or weak acid. Higher Ka means stronger acid as a result.
- Mon Dec 02, 2019 11:23 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Today's lecture
- Replies: 5
- Views: 340
Re: Today's lecture
We basically went over salts as acids and bases.
- Mon Dec 02, 2019 11:22 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Strength of bases BrO- and C17H19O3N
- Replies: 2
- Views: 216
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.
Conjugate base = BrO-
Morphine is basic because the nitrogen has a lone pair, so the compounds will be weak.
- Mon Dec 02, 2019 11:21 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Electronegativity and acid strength
- Replies: 5
- Views: 250
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.
Re: 9C #5
The question is asking which ligands can attach to multiple bonding sites (polydentate).
Poly- means multiple.
Poly- means multiple.
Re: 9C #9c/d
The abbreviations are just for the ligands.
- Mon Nov 25, 2019 12:24 pm
- Forum: Naming
- Topic: Roman numerals
- Replies: 6
- Views: 354
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.
- Mon Nov 25, 2019 12:23 pm
- Forum: Naming
- Topic: Di-, Tri-, Tetra- vs Bis-, Tris-, Tetrakis-
- Replies: 11
- Views: 911
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.
- Mon Nov 25, 2019 12:22 pm
- Forum: Naming
- Topic: Correct naming conventions
- Replies: 5
- Views: 306
Re: Correct naming conventions
Use the suffix -ate if the complex has a negative charge.
- Fri Nov 22, 2019 8:59 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 2E.5
- Replies: 5
- Views: 410
Re: 2E.5
It would be trigonal planar.
- Fri Nov 22, 2019 8:57 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR Bond Angles for Shapes with Lone Pairs
- Replies: 5
- Views: 352
Re: VSEPR Bond Angles for Shapes with Lone Pairs
These all look correct.
- Fri Nov 22, 2019 8:56 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: T-Shaped ??
- Replies: 9
- Views: 735
Re: T-Shaped ??
AX3E2 and AX3E3 are t-shaped
- Fri Nov 22, 2019 8:56 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Octahedral
- Replies: 6
- Views: 399
Re: Octahedral
It's because it is in the 3D form not 2D.
- Fri Nov 22, 2019 8:55 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angle of bent
- Replies: 17
- Views: 1227
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.
- Wed Nov 13, 2019 11:36 am
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Kinetic Energy Uncertainty Conversion
- Replies: 3
- Views: 307
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.
- Wed Nov 13, 2019 11:35 am
- Forum: *Particle in a Box
- Topic: Shape of Wavefunction
- Replies: 4
- Views: 1334
Re: Shape of Wavefunction
Wave function = quantum state of a system
Wave function squared = probability
Wave function squared = probability
- Wed Nov 13, 2019 11:34 am
- Forum: *Particle in a Box
- Topic: Application
- Replies: 4
- Views: 1174
Re: Application
When length increases, the energy gap decreases.
- Wed Nov 13, 2019 11:34 am
- Forum: *Particle in a Box
- Topic: Purpose
- Replies: 4
- Views: 1092
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.
- Wed Nov 13, 2019 11:32 am
- Forum: *Particle in a Box
- Topic: TEST 2
- Replies: 14
- Views: 1276
Re: TEST 2
Test 2 is Week 8 during your discussion class.
- Tue Nov 05, 2019 10:08 pm
- Forum: Trends in The Periodic Table
- Topic: Run Down of Trends
- Replies: 4
- Views: 202
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).
Ionization energy and electron affinity (increases as you go up and right).
- Tue Nov 05, 2019 10:07 pm
- Forum: Trends in The Periodic Table
- Topic: 3rd IE?
- Replies: 2
- Views: 149
Re: 3rd IE?
Yes, Ca would have the stronger 3rd ionization energy.
- Tue Nov 05, 2019 10:06 pm
- Forum: Trends in The Periodic Table
- Topic: Atomic Radii
- Replies: 11
- Views: 680
Re: Atomic Radii
You should know the period trend for atomic radii. It increases as it goes down and left of the periodic table.
- Tue Nov 05, 2019 10:05 pm
- Forum: Trends in The Periodic Table
- Topic: Electron affinity vs electronegativity
- Replies: 7
- Views: 258
Re: Electron affinity vs electronegativity
You just need to know the general concept and idea behind it. Know the trends as well.
- Tue Nov 05, 2019 10:05 pm
- Forum: Trends in The Periodic Table
- Topic: Electronegativity
- Replies: 11
- Views: 654
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.
- Sun Oct 27, 2019 9:08 pm
- Forum: Trends in The Periodic Table
- Topic: Electron affinity.
- Replies: 8
- Views: 235
Re: Electron affinity.
Electron affinity is the ability for an atom to accept electron. Greater nuclear charge means greater electron affinity.
- Sun Oct 27, 2019 9:01 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: HW 1D.23
- Replies: 4
- Views: 311
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.
- Sun Oct 27, 2019 9:00 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Radial Distribution Function
- Replies: 4
- Views: 203
Re: Radial Distribution Function
I do not think you are expected to know how to use the radical distribution function.
- Sun Oct 27, 2019 8:59 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: oribital numbers
- Replies: 7
- Views: 228
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.
- 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: 152
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).
- Mon Oct 21, 2019 5:32 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Quantum Numbers: Size of An Atom
- Replies: 4
- Views: 118
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.
- Mon Oct 21, 2019 5:31 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Quantum Number
- Replies: 4
- Views: 210
Re: Quantum Number
There's no equation for finding the quantum number.
- Mon Oct 21, 2019 5:30 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Schrodinger's wave function
- Replies: 3
- Views: 123
Re: Schrodinger's wave function
Basically he was referring to the shape of the wave function graph.
- Mon Oct 21, 2019 5:30 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Homework Question
- Replies: 2
- Views: 90
Re: Homework Question
Yup, we're still learning about quantum numbers, so just do the homework problems that we've covered in the lectures.
- Mon Oct 21, 2019 5:29 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Spin numbers
- Replies: 4
- Views: 163
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.
- Mon Oct 14, 2019 9:19 am
- Forum: Properties of Light
- Topic: Constants
- Replies: 2
- Views: 112
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.
- Mon Oct 14, 2019 9:18 am
- Forum: Properties of Light
- Topic: MidTerms and Finals
- Replies: 11
- Views: 390
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.
- Mon Oct 14, 2019 9:17 am
- Forum: Properties of Light
- Topic: 1B. 3
- Replies: 2
- Views: 163
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.
- Mon Oct 14, 2019 9:16 am
- Forum: Properties of Light
- Topic: When to use the Planck's Constant?
- Replies: 6
- Views: 305
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).
- Mon Oct 14, 2019 9:14 am
- Forum: Properties of Light
- Topic: Angstrom
- Replies: 10
- Views: 462
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.
- Tue Oct 08, 2019 4:59 pm
- Forum: Properties of Light
- Topic: Question 1A.3 c
- Replies: 5
- Views: 342
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.
- Tue Oct 08, 2019 4:57 pm
- Forum: Empirical & Molecular Formulas
- Topic: empirical to molecular formula [ENDORSED]
- Replies: 9
- Views: 569
Re: empirical to molecular formula [ENDORSED]
You simply divide the molar mass by the empirical mass.
- Tue Oct 08, 2019 4:56 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Molar Mass
- Replies: 7
- Views: 394
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.
- Tue Oct 08, 2019 4:54 pm
- Forum: Limiting Reactant Calculations
- Topic: Test 1
- Replies: 11
- Views: 474
Re: Test 1
I think it would be safe for you to know how to solve all of the homework problems assigned.
- Tue Oct 08, 2019 4:53 pm
- Forum: Balancing Chemical Reactions
- Topic: Combustion
- Replies: 17
- Views: 946
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.
- Tue Oct 08, 2019 4:52 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Polyatomic ions on Test 1
- Replies: 4
- Views: 240
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.
- Tue Oct 01, 2019 8:40 am
- Forum: Balancing Chemical Reactions
- Topic: Balancing Reactions
- Replies: 25
- Views: 2011
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.
- Tue Oct 01, 2019 8:38 am
- Forum: Significant Figures
- Topic: Decimals After Whole Numbers
- Replies: 6
- Views: 1257
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...
- Tue Oct 01, 2019 8:36 am
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Metal Sulfides and Molar Mass
- Replies: 3
- Views: 333
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...
- Tue Oct 01, 2019 8:33 am
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Accuracy vs Precision
- Replies: 10
- Views: 351
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 ...
- Tue Oct 01, 2019 8:25 am
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Formula Units
- Replies: 4
- Views: 161
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 ...