Search found 81 matches
- Thu Mar 14, 2019 11:36 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: k’ and A
- Replies: 4
- Views: 427
Re: k’ and A
k' represents the rate of the reverse reaction and A represents the frequency factor.
- Thu Mar 14, 2019 11:34 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Molecularity
- Replies: 5
- Views: 477
Re: Molecularity
Molecularity only has to do with the reactants of a reaction. It has to do with how many atoms are colliding with each other at the same time.
- Thu Mar 14, 2019 11:30 pm
- Forum: General Rate Laws
- Topic: slow/fast steps
- Replies: 7
- Views: 663
Re: slow/fast steps
Yea we will be given this information in the context of the problem.
- Thu Mar 14, 2019 11:28 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: catalyst or intermediate
- Replies: 3
- Views: 404
Re: catalyst or intermediate
Catalyst is always at the beginning of an equation and then used up while an intermediate is formed during a reaction and then used up again.
- Thu Mar 07, 2019 11:56 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Ecell
- Replies: 13
- Views: 1501
Re: Ecell
in order to calculate the Ecell of a system, you must use the standard reduction potentials and the formula Ecell=cathode-anode.
- Thu Mar 07, 2019 11:52 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Pt
- Replies: 14
- Views: 1365
Re: Pt
You would only add an inert electrode such as platinum(Pt) when there are no solids present in the reaction.
- Thu Mar 07, 2019 11:51 am
- Forum: Second Order Reactions
- Topic: graph for second order
- Replies: 7
- Views: 797
Re: graph for second order
The graph of a second order reaction is a positive slope of k when plotted on the graph of1/[A] vs time.
- Thu Mar 07, 2019 11:49 am
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Study Advice
- Replies: 73
- Views: 7179
Re: Study Advice
I usually attend Lyndon's review sessions on Mondays. He provides great insight and detail on all the topics we are currently learning and his worksheets are very helpful as well. Moreover, I normally do all the practice problems on the outlines Dr.Lavelle has on his class website. Those are really ...
- Thu Feb 28, 2019 9:24 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Pt inert electrode
- Replies: 9
- Views: 1814
Re: Pt inert electrode
Melody P 2B wrote:Would you add Pt(s) to both sides?
You would add Pt(s) to any side that does not have a solid. This allows electrons to be transferred.
- Thu Feb 28, 2019 9:22 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: H+, OH-, water
- Replies: 9
- Views: 944
Re: H+, OH-, water
You will only need to include H+ and OH- in the cell diagram; exclude water.
- Thu Feb 28, 2019 9:19 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Organization of cell diagrams
- Replies: 9
- Views: 855
Re: Organization of cell diagrams
Yes, you will need an inert electrode such as platinum when there is a gas and aqueous molecule in the cell diagram because there needs to be a metal present in order for the electrons to be transferred.
- Thu Feb 28, 2019 9:14 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: finding DeltaG
- Replies: 6
- Views: 672
Re: finding DeltaG
There are many equations in which you can use to solve for delta G. It all depends on what information you are given in the context of the question.
- Thu Feb 21, 2019 11:43 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Anode v. Cathode
- Replies: 9
- Views: 986
Re: Anode v. Cathode
The anode is is usually placed on the left side while the cathode is placed on the right side. The anode oxidizes the material present and the cathode reduces the material present. Electrons flow away from the anode and into the cathode.
- Thu Feb 21, 2019 11:34 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Free Energy
- Replies: 5
- Views: 513
Re: Free Energy
Yes, delta G is a state function. We can take a similar Hess's Law approach when trying to calculate the Gibbs free energy of a reaction. Another approach we can take to calculate the change in Gibbs free energy is by subtracting the total Gibbs Free energy of the reactants from the products.
- Thu Feb 21, 2019 11:25 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Salt Bridge/Porous Disk
- Replies: 5
- Views: 597
Re: Salt Bridge/Porous Disk
The purpose of a salt bridge/porous disk is for the ions to transfer and help maintain a neutral solution.
- Thu Feb 21, 2019 11:24 am
- Forum: Balancing Redox Reactions
- Topic: Week 7 Homework
- Replies: 15
- Views: 1253
Re: Week 7 Homework
According to Lavelle's email, we should be doing homework problems relating to Gibbs Free energy.
- Thu Feb 14, 2019 8:39 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: 3/2R vs 5/2R
- Replies: 8
- Views: 2084
Re: 3/2R vs 5/2R
It is very important to know the difference between. 5/2R is used for constant pressure and 3/2R is used for constant volume. You will have to use either one depending on the context of the question.
- Thu Feb 14, 2019 8:37 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: ΔU= 3/2nRT
- Replies: 5
- Views: 758
Re: ΔU= 3/2nRT
I have never really come across any question where I had to use this equation. It is basically another way to state the fact that delta U=0 for an isothermal, reversible expansion. You might want to learn it just in case.
- Thu Feb 14, 2019 8:34 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: adding entropy
- Replies: 5
- Views: 649
Re: adding entropy
Since entropy is a state function, you can simply add the entropy of the change in volume and temperature to find the total change in entropy of the system.
- Thu Feb 14, 2019 8:32 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Temperature and Equilibrium
- Replies: 3
- Views: 371
Re: Temperature and Equilibrium
If the reaction is endothermic, increasing the temperature will lead to an increase in product formation. If the reaction is exothermic, an increase in temperature will lead to an increase in of reaction formation.
- Thu Feb 07, 2019 1:14 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Irreversible vs. Reversible Expansion
- Replies: 4
- Views: 396
Re: Irreversible vs. Reversible Expansion
A key difference between reversible and irreversible expansion is that a reversible reaction does more work than an irreversible reaction. Also, in the real world, irreversible reactions are much more realistic.
- Thu Feb 07, 2019 1:01 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat Capacity vs. Specific Heat
- Replies: 2
- Views: 370
Re: Heat Capacity vs. Specific Heat
The equation "q = nC∆T" refers to the molar heat capacity because it measures the heat required to raise 1 mol of a substance by 1 degree celsius. We can ignore the "n" in the equation for the calorimeter because we are looking for the heat capacity instead.
- Thu Feb 07, 2019 12:54 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Quiz 1 Number 3c
- Replies: 6
- Views: 672
Re: Quiz 1 Number 3c
Since the question is asking for concentration values, the units for your answer should be molarity, mol/L.
- Thu Feb 07, 2019 12:48 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm
- Replies: 8
- Views: 928
Re: Midterm
Dr. Lavelle mentioned on his website that the midterm covers everything we learned so far till the end of entropy.
- Wed Jan 30, 2019 7:03 pm
- Forum: Phase Changes & Related Calculations
- Topic: Test #1
- Replies: 11
- Views: 984
Re: Test #1
Yea we get them back in discussion this week!
- Wed Jan 30, 2019 7:02 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Isolated systems
- Replies: 10
- Views: 814
Re: Isolated systems
An isolated system juts implies that that there is no exchange of energy or matter with the surroundings. An isolated system could have a constant volume but it is not necessary.
- Wed Jan 30, 2019 6:53 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: pKa vs. pH
- Replies: 15
- Views: 3017
Re: pKa vs. pH
The pKa and the pH represent two different things. The pKa is the -log(Ka) and can be used to determine the strength of an acid. On the other hand, the pH is the -log(H+) concentration.
- Wed Jan 30, 2019 6:50 pm
- Forum: Ideal Gases
- Topic: kc vs kp
- Replies: 19
- Views: 3507
Re: kc vs kp
Kc and Kp do not represent the same thing. Kp refers to the equilibrium constant using partial pressures while Kc refers to the equilibrium constant using concentration values.
- Thu Jan 24, 2019 1:36 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: When to ignore change in Acid
- Replies: 5
- Views: 882
Re: When to ignore change in Acid
Yes, you would ignore the change in acid when the Ka value is less than 10^-3 because it is considered a weak acid and the change in concentration is so small that it can be ignored.
- Thu Jan 24, 2019 1:35 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Test 1
- Replies: 8
- Views: 797
Re: Test 1
It is a great to know a common list of strong acids and bases for the test but it is not required. It is important to know that if the Ka/Kb value is less than 10^-3 it is a weak acid/base.
- Thu Jan 24, 2019 1:32 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: endothermic vs exothermic
- Replies: 6
- Views: 851
Re: endothermic vs exothermic
Le Chatelier's Principle refers to the process of chemical reactions adjusting to minimize the affect of certain changes. Moreover, exothermic means that heat is released as a part of the reaction and endothermic means that heat is required for the reaction to proceed.
- Thu Jan 24, 2019 1:26 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Calculating Q
- Replies: 11
- Views: 3872
Re: Calculating Q
Both Q and K use the same equation during calculation. However, K is used at equilibrium while Q can be used at any point during a reaction. It is important understand the fact that Q can be changed due to changes in pressure and concentration but K does not. K shifts only when there is a change in ...
- Thu Jan 17, 2019 11:41 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Changes to K value
- Replies: 9
- Views: 720
Re: Changes to K value
Only temperature can affect the K value
- Thu Jan 17, 2019 11:40 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kc of the Forward/Reverse Reaction
- Replies: 6
- Views: 10410
Re: Kc of the Forward/Reverse Reaction
The Kc of the reverse reaction is the reciprocal of the forward reaction. For example, if the Kc of the forward reaction is 5, the Kc of the reverse reaction is 1/5.
- Thu Jan 17, 2019 11:37 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Acid and Base Equilibria
- Replies: 7
- Views: 692
Re: Acid and Base Equilibria
megangeorge-1K wrote:For this week should we be submitting homework from chapter 12?
We can choose Hw questions from either Chemical Equilibria or Acids and Bases outlines.
- Thu Jan 17, 2019 11:34 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE Tables [ENDORSED]
- Replies: 11
- Views: 2441
Re: ICE Tables [ENDORSED]
ICE Tables are specifically used to find the equilibrium concentration of products and reactants when given the initial concentration. The value of the products will not always be zero. It will be values given from the question.
- Fri Jan 11, 2019 10:01 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Liquids and Solids in Equilibrium Constants
- Replies: 5
- Views: 393
Re: Liquids and Solids in Equilibrium Constants
The values of the change in concentration of solids and liquids are so small that they can be ignored when solving for the equilibrium constant.
- Fri Jan 11, 2019 9:59 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kc of the Forward/Reverse Reaction
- Replies: 6
- Views: 10410
Re: Kc of the Forward/Reverse Reaction
The Kc is representative of both the forward and reverse reactions because they reaction rates are reciprocals of one another.One way to visually see this is by solving for the K value of both reactions and you will see that the two rates are the inverse of one another.
- Fri Jan 11, 2019 9:54 am
- Forum: Ideal Gases
- Topic: What does K represent?
- Replies: 9
- Views: 2547
Re: What does K represent?
K represents the equilibrium constant which is denoted by the concentration of products over the concentration of the reactant. If both of the concentrations are the same, the K value would be one.
- Fri Jan 11, 2019 9:52 am
- Forum: Ideal Gases
- Topic: Q and K [ENDORSED]
- Replies: 35
- Views: 3189
Re: Q and K [ENDORSED]
Both have the same formula, but they calculate different things.
- Wed Dec 05, 2018 8:44 pm
- Forum: Naming
- Topic: Common Ligand names Table
- Replies: 1
- Views: 280
Re: Common Ligand names Table
I believe you are. However, you do not need to memorize ligand notations such as edta, ox, en, etc.
- Wed Dec 05, 2018 8:39 pm
- Forum: Bronsted Acids & Bases
- Topic: Bronsted Versus Lewis
- Replies: 4
- Views: 485
Re: Bronsted Versus Lewis
I believe it is that all Bronsted acids and bases are Lewis acids and bases, but not all Lewis acids and bases are Bronsted acids and bases.
- Wed Dec 05, 2018 8:35 pm
- Forum: Properties & Structures of Inorganic & Organic Bases
- Topic: HF ion
- Replies: 3
- Views: 549
Re: HF ion
HF is considered a weak acid due to fluorine's high electronegativity. Acids are considered strong when they completely dissociate in water and have longer, weaker bonds.
- Wed Dec 05, 2018 6:27 pm
- Forum: Naming
- Topic: Naming Coordination Compounds
- Replies: 4
- Views: 478
Re: Naming Coordination Compounds
Yea we have to memorize them. However, he said that we do not need to memorize notations such as edta, en, ox, etc.
- Sat Dec 01, 2018 5:15 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polar Molecules
- Replies: 12
- Views: 938
Re: Polar Molecules
In order to determine if a molecule is polar or non-polar, you can draw out the lewis structure and identify the dipole moments of the given molecule. If the dipole moments cancel, the molecule is non-polar. If the dipole moments do not cancel, the molecule is polar.
- Sat Dec 01, 2018 5:00 pm
- Forum: Hybridization
- Topic: Pi bonds in triple bond
- Replies: 17
- Views: 1894
Re: Pi bonds in triple bond
There are 2 pi bonds and one sigma bond in a triple bond.
- Sat Dec 01, 2018 4:56 pm
- Forum: Naming
- Topic: CN naming?
- Replies: 3
- Views: 283
Re: CN naming?
The book uses the "-ido" suffix when naming coordination compounds, but Dr. Lavelle use the suffix "-o". They are both technically correct but I would use the notation Dr. Lavelle uses.
- Sat Dec 01, 2018 4:54 pm
- Forum: Hybridization
- Topic: Hybridization Notation
- Replies: 10
- Views: 930
Re: Hybridization Notation
Either notation is acceptable but Dr. Lavelle mentioned that he prefers the d orbital to placed at the end.
- Sat Nov 24, 2018 12:59 pm
- Forum: Hybridization
- Topic: Writing out Hybridization
- Replies: 8
- Views: 602
Re: Writing out Hybridization
Dr. Lavelle mentioned that it does not matter which notation you use when writing out the d-block in hybridization, but he did say that he will be writing it as sp^3d in lecture.
- Sat Nov 24, 2018 12:50 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarity
- Replies: 7
- Views: 786
Re: Polarity
We typically indicate dipole moments by drawing an arrow towards the partial negative end of a molecule. If arrows cancel out, we know hat the molecule in non-polar.
- Sat Nov 24, 2018 12:46 pm
- Forum: Hybridization
- Topic: double bonds
- Replies: 14
- Views: 1249
Re: double bonds
In a double bond there is one pi bond and one sigma bond. In a triple bond, there is one sigma bond and two pi bonds now due an additional side-to-side overlap.
- Sat Nov 24, 2018 12:39 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Test 3
- Replies: 10
- Views: 1034
Re: Test 3
I would study both outline 3 and 4 just to be safe.
- Wed Nov 14, 2018 10:51 pm
- Forum: Lewis Structures
- Topic: Expanded Octets
- Replies: 9
- Views: 2840
Re: Expanded Octets
Elements that contain a d-orbital can have expanded octets.
- Wed Nov 14, 2018 10:45 pm
- Forum: Dipole Moments
- Topic: How do you draw dipole moments
- Replies: 6
- Views: 1031
Re: How do you draw dipole moments
To indicate a dipole moment, you need to draw an arrow pointing towards the most electronegative element.
- Wed Nov 14, 2018 10:38 pm
- Forum: Lewis Structures
- Topic: Boron Trifluoride
- Replies: 8
- Views: 834
Re: Boron Trifluoride
Boron is an exception to the octet rule, just like any other element in group 13 such as Aluminum.
- Wed Nov 14, 2018 10:35 pm
- Forum: Lewis Structures
- Topic: Formal Charge
- Replies: 14
- Views: 1317
Re: Formal Charge
When drawing Lewis structures for ions, it is best of the central atom to have a formal charge of 0 and to place any negative charge on the outer elements because that is when it is most stable.
- Thu Nov 08, 2018 5:14 pm
- Forum: Bond Lengths & Energies
- Topic: Tests
- Replies: 5
- Views: 645
Re: Tests
Yup, just one more test and then the final.
- Thu Nov 08, 2018 5:12 pm
- Forum: Lewis Structures
- Topic: Mystery Element
- Replies: 4
- Views: 554
Re: Mystery Element
Just to reiterate, the central element is typically the least electronegative atom and a good way to check that is to calculate the formal charges of all the elements in the molecule.
- Thu Nov 08, 2018 5:09 pm
- Forum: SI Units, Unit Conversions
- Topic: formula units [ENDORSED]
- Replies: 69
- Views: 32899
Re: formula units [ENDORSED]
Arlene Linares 3A wrote:For the midterm, does anyone knows how much the units are worth when graded?
I believe both units and sig figs are each worth one point.
- Thu Nov 08, 2018 5:07 pm
- Forum: Lewis Structures
- Topic: Double Bonds
- Replies: 7
- Views: 570
Re: Double Bonds
I typically include double bonds to lower the formal charge of the an element. It is important to remember to not exceed 4 bonds per element unless the element can have an expanded octet such as sulfur and phosphorous.
- Thu Nov 08, 2018 5:03 pm
- Forum: Lewis Structures
- Topic: Formal charge question
- Replies: 9
- Views: 933
Re: Formal charge question
When I draw out Lewis structures, I count all the numbers of valence electrons in the given molecule and follow the octet guidelines given to us by Dr. Lavelle. I calculate formal charge when I need to draw out the lowest energy Lewis structure.
- Wed Oct 31, 2018 11:24 am
- Forum: Resonance Structures
- Topic: How does a resonance structure work?
- Replies: 10
- Views: 1159
Re: How does a resonance structure work?
Just to reiterate, resonance structures are basically lewis structures that can be written in multiple forms, the difference being the arrangement of the bonds between each resonance structure. The chemical properties are all the same.
- Wed Oct 31, 2018 11:17 am
- Forum: Lewis Structures
- Topic: Valence Electrons
- Replies: 7
- Views: 678
Re: Valence Electrons
Phosphorous can have 5 bonds since it is in Period 3 and the d-block is included within it. As a result, it has 10 valence electrons and can create 5 bonds.
- Wed Oct 31, 2018 11:13 am
- Forum: Lewis Structures
- Topic: Central Atom
- Replies: 13
- Views: 918
Re: Central Atom
When dealing with Lewis structures, the atom with the lowest ionization energy would be used as the central atom. Hydrogen is never the central atom so it would be Carbon in this case.
- Wed Oct 31, 2018 11:10 am
- Forum: Ionic & Covalent Bonds
- Topic: Covalent Bonds
- Replies: 16
- Views: 1635
Re: Covalent Bonds
Just to reiterate, nonmetals(anions) cannot become cations due to their high electronegativity and lack of electrons in their valence shell. Nonmetals such as chlorine with 7 valence electrons only needs one more electron to complete their octet so they would attract other elements in giving up an e...
- Wed Oct 24, 2018 3:08 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Test 2 outline
- Replies: 4
- Views: 753
Re: Test 2 outline
Yes. Basically, know what all the quantum numbers are and what they mean and know how to use them to label a given orbital.
- Wed Oct 24, 2018 11:25 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: exceptions: chromium & copper
- Replies: 2
- Views: 309
Re: exceptions: chromium & copper
No, the 3d orbital would still be considered to be at a a lower energy level than the 4s orbital regardless whether or not the 4s orbital is completely filled.
- Wed Oct 24, 2018 11:18 am
- Forum: DeBroglie Equation
- Topic: equation definition
- Replies: 5
- Views: 956
Re: equation definition
The De Broglie equations includes the mass and velocity of a given particle while the normal wavelength equation can also be associated with light. You can tell which equation to use in a given situation based upon the parameters listed in the question.
- Wed Oct 24, 2018 11:11 am
- Forum: Properties of Light
- Topic: kg or g [ENDORSED]
- Replies: 11
- Views: 1695
Re: kg or g [ENDORSED]
mostly all the equations we were taught in the quantum world chapter use kilograms as the unit for mass since kg is the SI unit.
- Tue Oct 16, 2018 12:15 pm
- Forum: Properties of Light
- Topic: E=hv
- Replies: 13
- Views: 1108
Re: E=hv
yes, E represents the amount of energy per photon. The units for E is Joules.
- Tue Oct 16, 2018 12:12 pm
- Forum: *Particle in a Box
- Topic: Hw assignment?
- Replies: 7
- Views: 1299
Re: Hw assignment?
Yea make sure to only do questions from the Quantum World chapter. I asked my TA the same question and he made it very clear to not do problems from the Fundamentals section nor from the Chemical Bonds section because we have not covered it yet.
- Tue Oct 16, 2018 12:09 pm
- Forum: Properties of Light
- Topic: Mass
- Replies: 4
- Views: 265
Re: Mass
Light cannot gain mass when it is stagnant because the particles are always in constant motion.
- Tue Oct 16, 2018 12:06 pm
- Forum: Properties of Light
- Topic: Vocab
- Replies: 5
- Views: 478
Re: Vocab
In our case, the thing being quantized is energy. When energy is quantized, energy is packaged into small discrete packets of energy called quanta.
- Tue Oct 09, 2018 6:44 pm
- Forum: Empirical & Molecular Formulas
- Topic: Going from empirical to Molecular formula
- Replies: 14
- Views: 2218
Re: Going from empirical to Molecular formula
Yea, it should be a whole number. The questions are usually phrased in a way in which the multiple of of the molecular to empirical formula is easy to work with. However, there may be examples where the multiple is "3.99" or "4.02". In this case, you would round to the nearest wh...
- Tue Oct 09, 2018 6:40 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Periodic Table
- Replies: 6
- Views: 539
Re: Periodic Table
Yes, periodic tables will be provided during the exam.
- Tue Oct 09, 2018 6:39 pm
- Forum: SI Units, Unit Conversions
- Topic: Quiz 1- Addition to what we should know?
- Replies: 5
- Views: 618
Re: Quiz 1- Addition to what we should know?
I asked him this same question as well! For this quiz specifically, we do not need to know the names of specific cations and anions. He said that the way we will eventually memorize them is over time by practicing questions and solving problems. It will become second nature to us.
- Tue Oct 09, 2018 6:35 pm
- Forum: Properties of Light
- Topic: C=Delta x V
- Replies: 6
- Views: 615
Re: C=Delta x V
From the equation, c(speed of light, 3*10^8 m/s)=lambda(wavelength, nm)*v(frequency, Hz), you are able to figure out many different variables and understand conceptual topics. For example, the speed of light, "c", is always a constant. This tells us that if that if the wavelength increases...
- Sun Sep 30, 2018 9:49 pm
- Forum: SI Units, Unit Conversions
- Topic: How does grading for discussion posts work?
- Replies: 80
- Views: 8848
Re: How does grading for discussion posts work?
As long as you participate in any of the the given discussion topics or ask your own question a minimum of 3 times a week, you will receive a maximum of 3 points for the entire week for 10 weeks. Chemistry Community counts for 30 points of your entire grade for the quarter. The syllabus for this cla...
- Sun Sep 30, 2018 9:30 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Solutions Manual
- Replies: 9
- Views: 1871
Re: Solutions Manual
I have the solutions manual for the 6th edition textbook and it is very helpful for me. It gives me the ability to check my answers and shows me the steps for certain questions I have trouble figuring out. It is a great way to understand new material as well if you want to get ahead and try new sets...
- Sun Sep 30, 2018 9:14 pm
- Forum: Balancing Chemical Reactions
- Topic: Short cuts/methods for balancing equations
- Replies: 15
- Views: 1801
Re: Short cuts/methods for balancing equations
For me personally, I start by balancing the gases and then make my way to the solids. It generally works and makes things easier for me.
- Sun Sep 30, 2018 6:03 pm
- Forum: Student Social/Study Group
- Topic: 7 sets of problems?
- Replies: 5
- Views: 836
Re: 7 sets of problems?
Hello,
Towards the end of the syllabus, Dr. Lavelle has a list of problems that need to be completed for homework every week. You can choose any of those seven to complete.
Towards the end of the syllabus, Dr. Lavelle has a list of problems that need to be completed for homework every week. You can choose any of those seven to complete.