Search found 59 matches
- Sun Mar 18, 2018 1:04 am
- Forum: *Nucleophiles
- Topic: Saying Happy Birthday to Emily Warda
- Replies: 1
- Views: 1182
Saying Happy Birthday to Emily Warda
Hey everyone, many of you may not know this but Emily Warda's birthday is the same day as our final so if you see Emily tomorrow make sure you wish her happy birthday!
- Sun Mar 18, 2018 1:01 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: When to include an inert electrode such as Pt(s)
- Replies: 2
- Views: 445
When to include an inert electrode such as Pt(s)
When writing a cell diagram when is it necessary to include an inert electrode such as Pt(s)?
Thank you!
Thank you!
- Sat Mar 17, 2018 11:19 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Spontaneity question
- Replies: 7
- Views: 1016
Spontaneity question
If delta S total is positive can you say that a reaction is spontaneous or is the only way to determine the spontaneity of a reaction through calculating Gibbs free energy?
- Fri Mar 16, 2018 10:16 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Question from test 1
- Replies: 1
- Views: 393
Question from test 1
Hi, I still do not understand the following question from test 1: "Answer yes or no if heat is being transferred in the following processes, and justify your reasoning. a. A tank of liquefied propane is punctured, emitting gaseous propane vapors. b. A balloon filled with gas is expanded to a la...
- Sun Mar 11, 2018 1:46 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: catalyst vs intermediate
- Replies: 2
- Views: 407
Re: catalyst vs intermediate
A catalyst will appear in both the reactants and products since it is not consumed during a reaction. On the other hand, an intermediate does not appear in the reactants or products because the intermediate is produced and consumed during the course of a reaction.
- Sun Mar 11, 2018 1:44 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Homework problem 15.69
- Replies: 1
- Views: 292
Homework problem 15.69
Could someone please explain to me how to do homework problem 15.69: "A reaction rate increases by a factor of 1000 in the presence of a catalyst at 25 degrees Celsius. The activation energy of the original pathway is 98 kJ per mol. What is the activation energy of the new pathway, all other fa...
- Sun Mar 11, 2018 1:32 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Homework Problem 15.67
- Replies: 1
- Views: 323
Homework Problem 15.67
Could someone please explain to me how to do homework problem 15.67: "The presence of a catalyst provides a reaction pathway in which the activation energy of a certain reaction is reduced from 125 kJ per mol to 75 kJ per mol. By what factor does the rate of reaction increase at 298K, all other...
- Sat Mar 10, 2018 7:18 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Temperature and equilibrium constant [ENDORSED]
- Replies: 2
- Views: 396
Temperature and equilibrium constant [ENDORSED]
Can someone please explain to me what raising the temperature does to the equilibrium constant of a reaction.
- Sat Mar 10, 2018 7:16 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: relationship between temperature and rate constants [ENDORSED]
- Replies: 2
- Views: 478
relationship between temperature and rate constants [ENDORSED]
Could someone please explain to me the effect that raising the temperature has on the rate constants of a reaction?
- Sat Mar 10, 2018 4:54 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Rate determining step
- Replies: 2
- Views: 353
Rate determining step
When deriving an overall rate law using pre-equilibrium approximation and a proposed mechanism, do we have to consider the rate determining step?
- Mon Feb 26, 2018 8:08 pm
- Forum: General Rate Laws
- Topic: Homework Problem 15.3
- Replies: 4
- Views: 740
Homework Problem 15.3
Homework question 15.3: "In 20 s the concentration of nitrogen dioxide, NO2, decreases from 450 mmol.L-1 to 320 mmol.L-1 in the reaction 2NO2(g)--->2NO(g) + O2(g). Determine the rate of reaction of NO2" Why is it that in the answer key the rate of reaction of NO2 is not divided by its stoi...
- Sun Feb 25, 2018 11:21 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Pre-equilibrium condition [ENDORSED]
- Replies: 2
- Views: 218
Pre-equilibrium condition [ENDORSED]
Could someone please explain what a pre-equilibrium condition is and the purpose that it serves.
Thank you.
Thank you.
- Sun Feb 25, 2018 11:20 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Steady State Approximation [ENDORSED]
- Replies: 2
- Views: 647
Steady State Approximation [ENDORSED]
I'm very confused by the book's explanation of steady state approximation to determine an overall rate law. Could someone please explain to me how to do steady state approximation to determine an overall rate law from a reaction mechanism? Why do we need to assume that any intermediate formed remain...
- Sun Feb 18, 2018 9:39 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Determining Q when only one element is involved
- Replies: 1
- Views: 258
Determining Q when only one element is involved
Homework question 14.51 asks you to find that maximum work (per mol of Ag) that the following cell can do: Ag(s)/Ag+(aq, 5.0 mmol/L)//Ag+(aq, 0.15 mol/L)/Ag(s). Since I need to find Q to answer this question and since the oxidation and reduction half reactions cancel each other out for this problem,...
- Sun Feb 18, 2018 6:52 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagram [ENDORSED]
- Replies: 5
- Views: 783
Cell Diagram [ENDORSED]
How does one determine which elements and or compounds are reactants and which are products from looking at a cell diagram? In other words, if you looked at the left (anode) side of a cell diagram, how do you know which are reactants and which are products in the oxidation half reaction?
- Sun Feb 18, 2018 5:16 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 14.11d
- Replies: 1
- Views: 275
14.11d
Could someone please explain to me how to do homework problem 14.11d, "Write the half reactions and the balanced equation for the cell reaction for each of the following galvanic cells:......d. Pt(s)/O2(g)/H+(aq)//OH-(aq)/O2(g)/Pt(s).
Thank you
Thank you
- Wed Feb 14, 2018 12:21 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Difference between delta S and delta S naught
- Replies: 2
- Views: 8111
Difference between delta S and delta S naught
Could someone please explain in detail the difference between delta S and delta S naught. Why is it that delta S total can be used to indicate the spontaneity of a reaction while delta S naught cannot be used to indicate spontaneity?
- Tue Feb 13, 2018 10:42 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Difference between Gibbs Free Energy and standard Gibbs Free Energy
- Replies: 2
- Views: 6667
Difference between Gibbs Free Energy and standard Gibbs Free Energy
Could someone please explain, in detail, the difference between Gibbs Free Energy and standard Gibbs free energy to me. Thank you.
- Tue Feb 13, 2018 4:45 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: What does n represent?
- Replies: 2
- Views: 1921
What does n represent?
In the two equations delta S = n Cv ln(T2/T1) and delta S = nRln(v2/v1), what does n represent? Please be specific in terms of whether n represents products or reactants.
- Tue Feb 13, 2018 2:33 pm
- Forum: Balancing Redox Reactions
- Topic: 14.1 Question
- Replies: 2
- Views: 427
14.1 Question
For homework problem 14.1, it asks you to write the oxidation and reduction half reactions for the reaction: H+(aq) + Cr2O7^2- (aq) + C2H5OH (aq)---->Cr^3+(aq) C2H4OH (aq) + H2O (l). According to the solutions manual, the balanced reduction half reaction is Cr2O7^2- (aq) + 14H+(aq) + 6e- ----> 2Cr^3...
- Sun Feb 04, 2018 10:48 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: HW Problem 11.77b
- Replies: 1
- Views: 289
HW Problem 11.77b
Could someone please explain to me how to do homework problem 11.77b, "Predict whether each of the following equilibria will shift toward products or reactants with a temperature increase: X2(g)---->2X(g), where X is a halogen."
Thank you.
Thank you.
- Sun Feb 04, 2018 10:03 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Units for pressure in Gibbs Free Energy calculations
- Replies: 1
- Views: 224
Units for pressure in Gibbs Free Energy calculations
What are the standard units for pressure that we should use in Gibbs Free Energy calculations so that the result has the correct units?
- Sun Feb 04, 2018 9:59 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Q or Qc when calculating Gibbs Free Energy
- Replies: 1
- Views: 600
Q or Qc when calculating Gibbs Free Energy
Provided that when using the van't Hoff equation for reactions involving gases, the equilibrium constants must be K not Kc, when using the equation delta G= standard delta G - RTlnQ, can one use Qc for gases or does this equation also require you to use partial pressures?
- Mon Jan 29, 2018 10:26 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: 9.27a
- Replies: 4
- Views: 455
9.27a
Homework 9.27a: Which substance has the higher molar entropy at 298K, HBr (g) or HF (g). Provided that both of these molecules have the same number of microstates, how does one determine the molar entropy difference between these two molecules?
- Mon Jan 29, 2018 10:20 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Enthalpy in the Gibbs Free Energy Equation
- Replies: 2
- Views: 335
Re: Enthalpy in the Gibbs Free Energy Equation
Page 348 equations (15) and (16). I understood the derivation of the equation for change in Gibbs Free Energy we did in lecture but was somewhat confused reading this page.
- Mon Jan 29, 2018 9:31 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: standard Gibbs free energy of reaction
- Replies: 1
- Views: 268
standard Gibbs free energy of reaction
Could someone please explain to me what the book means when it says that the standard Gibbs free energy of reaction is a fixed quantity for a given reaction and does not vary as the reaction proceeds.
- Mon Jan 29, 2018 9:13 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Enthalpy in the Gibbs Free Energy Equation
- Replies: 2
- Views: 335
Enthalpy in the Gibbs Free Energy Equation
Provided that the change in Gibbs free energy for a process occurring at constant temperature is equal to the change in enthalpy minus the temperature times the change in entropy of the system, why is it that when a process occurs at constant temperature and pressure the change in Gibbs free energy ...
- Mon Jan 22, 2018 12:15 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Difference between U and H? [ENDORSED]
- Replies: 3
- Views: 7473
Difference between U and H? [ENDORSED]
Could someone please explain, in detail, the difference between U (internal energy) and H (enthalpy). Why does the equation for Cv use U while the equation for Cp use H?
- Mon Jan 22, 2018 12:08 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Positive/Negative Signs in Entropy calculations
- Replies: 1
- Views: 175
Positive/Negative Signs in Entropy calculations
I'm confused about the sign of entropy change since q is negative when it is released by a system and positive when it is gained by the system's surroundings. That being said, when calculating the change in entropy how do you know what sign to use? Also how does positive entropy differ from negative...
- Mon Jan 22, 2018 12:03 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Calculating Entropy for Irreversible Energy Transfers [ENDORSED]
- Replies: 1
- Views: 193
Calculating Entropy for Irreversible Energy Transfers [ENDORSED]
Provided that in order to calculate the change in entropy of a system, the energy must be transferred reversibly and that for a reversible transfer of energy as heat to occur, the temperature of the surroundings and the system must be infinitesimally different and both must be constant.... how would...
- Tue Jan 16, 2018 3:27 pm
- Forum: Phase Changes & Related Calculations
- Topic: Homework Problem 8.41
- Replies: 1
- Views: 332
Homework Problem 8.41
Could someone please explain to me how to do homework problem 8.41: "A 50 gram ice cube at 0.0 degrees Celsius is added to a glass containing 400.0 grams of water at 45.0 degrees Celsius. What is the final temperature of the system? Assume that no heat is lost to the surroundings." Thank y...
- Tue Jan 16, 2018 2:28 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: What does R stand for?
- Replies: 13
- Views: 3322
What does R stand for?
The equation relating the heat capacity of an ideal gas at constant pressure and the heat capacity of an ideal gas at constant volume is:
Cpm=Cvm + R
That being said, what is R? Is it the gas constant? If so how does one go about deciding which value to use for R?
Cpm=Cvm + R
That being said, what is R? Is it the gas constant? If so how does one go about deciding which value to use for R?
- Tue Jan 16, 2018 2:15 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: 8.31
- Replies: 4
- Views: 372
8.31
Could someone please explain to me how to do homework problem 8.31, "Calculate the heat released by 5.025 g of Kr(g) at 0.400 atm as it cools from 97.6 degrees Celsius to 25.0 degrees Celsius at a. a constant pressure and b. constant volume. Assume that krypton behaves like an ideal gas." ...
- Thu Jan 11, 2018 2:28 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Homework Problem 8.21
- Replies: 4
- Views: 366
Homework Problem 8.21
Could someone please explain to me how to do homework problem 8.21, "A piece of copper of mass 20.0 g at 100.0 degrees Celsius is placed in a vessel of negligible heat capacity but containing 50.7 g of water at 22.0 degrees Celsius. Calculate the final temperature of the water. Assume that no e...
- Thu Jan 11, 2018 2:14 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Homework Problem 8.19
- Replies: 3
- Views: 429
Homework Problem 8.19
Homework problem 8.19 reads, "Calculate the heat that must be supplied to a 500.0 g copper kettle containing 400.0 g of water to raise its temperature from 22.0 degrees Celsius to the boiling point of water, 100 degrees Celsius. What percentage of the heat is used to raise the temperature of th...
- Wed Jan 10, 2018 10:38 pm
- Forum: Calculating Work of Expansion
- Topic: Reversible vs. Irreversible Reaction
- Replies: 2
- Views: 381
Reversible vs. Irreversible Reaction
Hi,
Could someone please clarify the difference between a reversible and an irreversible reaction. Also why is the work done during a reversible expansion of a gas the maximum expansion work possible?
Thanks.
Could someone please clarify the difference between a reversible and an irreversible reaction. Also why is the work done during a reversible expansion of a gas the maximum expansion work possible?
Thanks.
- Fri Dec 08, 2017 5:03 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Practice Test Fall 2017 [ENDORSED]
- Replies: 19
- Views: 3386
Re: Practice Test Fall 2017 [ENDORSED]
Hi,
Is there any way you could post the answers to the practice test for those people that are unable to come to the review session?
Thank you!
Is there any way you could post the answers to the practice test for those people that are unable to come to the review session?
Thank you!
- Thu Dec 07, 2017 7:15 pm
- Forum: Lewis Acids & Bases
- Topic: 12.13
- Replies: 5
- Views: 880
12.13
12.13 Asks you to draw the Lewis structure for several different species and to identify each as a Lewis acid or Lewis base. I'm confused because part c asks for the Lewis structure of Ag+. How does one go about doing this since the electron configuration of Ag+ is [Kr]4d95s1?
- Thu Dec 07, 2017 6:51 pm
- Forum: Bronsted Acids & Bases
- Topic: 12.7
- Replies: 1
- Views: 182
12.7
Question 12.7 asks you to name two different oxoacids. Does anyone know if there is a section in the book that explains how to name acids and bases/if we need to know it for the final? Thanks.
- Thu Dec 07, 2017 6:46 pm
- Forum: Conjugate Acids & Bases
- Topic: 12.3a
- Replies: 4
- Views: 646
12.3a
Question 12.3 in the text says, "Write the proton transfer equilibria for the following acids in aqueous solution and identify the conjugate acid-base pairs in each one." Part a asks you to do this for H2SO4. I'm confused because I identified the conjugate base to H2SO4 as SO4 (-2) and acc...
- Wed Dec 06, 2017 3:32 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Strength of an Acid
- Replies: 5
- Views: 1085
Strength of an Acid
So in the book on page 482, it says that "the greater the electronegativity of A, the stronger the acid HA." However, it then goes on to say that in group 17, the acid strengths are HF<HCl<HBr<HI. I'm confused by this because isn't Fluorine more electronegative than Iodine? Therefore shoul...
- Tue Nov 28, 2017 10:54 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: change in temperature
- Replies: 4
- Views: 407
Re: change in temperature
"A change in temperature will always favor the exothermic reaction whether it is an increase or decrease." ---Pretty sure if temperature is raised, a reaction mixture at equilibrium will actually shift the reaction in the endothermic direction in order to counter the effect of heat being a...
- Mon Nov 27, 2017 9:28 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Compressing a Reaction Mixture
- Replies: 1
- Views: 668
Compressing a Reaction Mixture
I'm confused by the book's statement, "Compression of a reaction mixture at equilibrium tends to drive the reaction in the direction that reduces the number of gas phase molecules; increasing the pressure by introducing an inert gas has no effect on equilibrium." Doesn't compression increa...
- Sun Nov 26, 2017 11:39 pm
- Forum: Naming
- Topic: 17.31 c and d confusion
- Replies: 5
- Views: 911
17.31 c and d confusion
I'm a little bit confused because the book says that water as a ligand is denoted OH2 but in the solution for 17.31c the formula for tetraamminediaquacobalt(III) bromide is written as [Co(NH3)4(H20)2]Br3. Does anyone know why water is written as H2O here? I'm also confused because the book tells us ...
- Sun Nov 26, 2017 8:07 pm
- Forum: Octet Exceptions
- Topic: Midterm Question 8B
- Replies: 2
- Views: 501
Midterm Question 8B
Midterm question 8b: "Draw the Lewis structure for the compound (HOCO)" When I drew the Lewis structure for this compound I gave one of the oxygens the extra, unpaired electron and it was wrong even though the formal charge of all of the atoms was zero. Could someone please explain to me w...
- Wed Nov 15, 2017 1:18 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Shape of BH2- [ENDORSED]
- Replies: 1
- Views: 8153
Shape of BH2- [ENDORSED]
For problem 4.19c, it asks you to predict the shape and estimate the bond angle of BH2-. Could someone please explain to me how to do both of these things. I'm somewhat confused because the Lewis Structure makes it seem like the shape will be linear and the angle will be 180 degrees but according to...
- Wed Nov 15, 2017 12:59 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 4.13c Bond Angle Question [ENDORSED]
- Replies: 3
- Views: 1442
4.13c Bond Angle Question [ENDORSED]
In question 4.13c it asks you to determine the bond angle for IO3-. After determining the Lewis structure, I found the VSEPR formula for this molecule to be AX3E. That being said, the shape of the molecule is trigonal pyramidal. However, I'm confused about how to determine the bond angle. The soluti...
- Wed Nov 08, 2017 12:42 pm
- Forum: Coordinate Covalent Bonds
- Topic: Confusion about BF3 [ENDORSED]
- Replies: 1
- Views: 384
Confusion about BF3 [ENDORSED]
If in the Lewis structure of BF3, the boron atom has an incomplete octet due to the fact that fluorine has such a high ionization energy and is unlikely to exist with a positive formal charge, then how can a tetrafluoroborate anion form when boron trifluoride is passed over metal fluoride? Wouldn't ...
- Wed Nov 08, 2017 12:24 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Shape of AX3E2 [ENDORSED]
- Replies: 1
- Views: 537
Shape of AX3E2 [ENDORSED]
Homework question 4.11b asks you to find the VSEPR formula and predict the shape of iodine trichloride. The VSEPR formula for this molecule is AX3E2. With that in mind I expected the arrangement of electrons to be trigonal bipyramidal around the atom with the two lone pairs in equatorial positions. ...
- Wed Nov 08, 2017 12:18 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 4.11a
- Replies: 2
- Views: 338
4.11a
4.11a asks you to give the VSEPR formula and predict the shape for sulfur tetrachloride. After figuring out the Lewis structure one finds the VSEPR formula to be AX4E. With this in mind, I predicted the arrangement of electron pairs to be triangular bipyramidal and the shape of the molecule to be py...
- Sat Nov 04, 2017 6:40 pm
- Forum: Lewis Structures
- Topic: Identifying an element from a given Lewis Structure (3.37)
- Replies: 4
- Views: 2400
Identifying an element from a given Lewis Structure (3.37)
Hi. I was hoping someone could explain to me how to do homework problem 3.37. The problem says, "The following Lewis structure was drawn for a Period 3 element. Identify the element." The Lewis Structure shows a central atom "E" surrounded by 3 Cl atoms and 1 O atom. There is a d...
- Tue Oct 31, 2017 1:02 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configuration for Bi3+
- Replies: 2
- Views: 2161
Electron Configuration for Bi3+
Hi, I'm wondering how one would go about writing the electron configuration for Bi+3. Since Xenon is the previous noble gas, I started by writing [Xe]. Then since Bi is in the 6th period I continued adding electrons with n=6 until I reached 80 electrons. I got the configuration [Bi]6s2 6p6 6d10 6f8....
- Mon Oct 23, 2017 11:12 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: 3d and 4s
- Replies: 5
- Views: 1395
3d and 4s
Could someone please explain to me when 3d is filled before 4s and when it is not. I'm very confused about this. What are the exceptions to the rules regarding 3d and 4s? Also could someone explain to me why the electron configuration of Titanium is [Ar]3d24s2 instead of [Ar]3d4. Thank you.
- Mon Oct 23, 2017 9:33 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Wave function question
- Replies: 1
- Views: 250
Wave function question
I understand that the probability of finding the particle in a region is proportional to the value of the wave function squared in that region. However, I'm confused as to how one determines what region of an atom is being described by the wave function. I'm having a hard time understanding how a tw...
- Mon Oct 23, 2017 9:26 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Question on the difference between quantum numbers l and ml.
- Replies: 3
- Views: 1569
Question on the difference between quantum numbers l and ml.
I was hoping that someone would be able to clarify what l and ml actually represent. I understand that l distinguishes the shape of the orbital and ml indicates the orientation of the orbital. However, I'm confused because on page 35 of the textbook it says, "As its name suggests, l tells us th...
- Sat Oct 14, 2017 12:05 am
- Forum: Properties of Light
- Topic: Balmer and Lyman Clarification [ENDORSED]
- Replies: 3
- Views: 471
Balmer and Lyman Clarification [ENDORSED]
Does the Balmer and Lyman Series only apply to the element hydrogen? I was hoping that someone could clarify this for me.
Thanks
Thanks
- Sat Oct 14, 2017 12:01 am
- Forum: Properties of Light
- Topic: Balmer Vs. Lyman
- Replies: 15
- Views: 4092
Re: Balmer Vs. Lyman
When an electron drops down energy levels, it releases its energy as a photon and light is emitted. The Lyman Series consists of the wavelengths of light that are emitted when an electron drops down from any of the outer orbitals (n=2,3,4,5....) to the first orbital (n=1). Similarly, the Balmer Seri...
- Mon Oct 02, 2017 3:59 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Finding the Concentration of a Specific Ion in Solutino [ENDORSED]
- Replies: 2
- Views: 2531
Finding the Concentration of a Specific Ion in Solutino [ENDORSED]
I'm comfortable finding the concentration of certain molecules in solution. However I'm confused because some of the problems on the homework ask for the concentration of specific ions in a solution. For example problem G21: "A solution is prepared by dissolving 0.500 g of KCl, 0.500 g of K2S, ...
- Mon Oct 02, 2017 1:46 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Help with homework problem E3
- Replies: 3
- Views: 419
Help with homework problem E3
Hi could someone please explain to me how to do homework problem E3....I was able to find the weight of 9 Ga atoms but am confused about how to proceed from there.
Thanks
Thanks