Which of the following ligands can be polydentate? If the ligand can be polydentate, give the maximum number of places on the ligand that can bind simultaneously to a single metal center: (a) HN(CH2CH2NH2)2; (b) (CO3)2-; (c) H2O; (d) oxalate
Can someone explain the process of doing this problem?
Search found 55 matches
- Fri Dec 06, 2019 9:59 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Homework Help
- Replies: 1
- Views: 131
- Fri Dec 06, 2019 9:57 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: HW 9C.9
- Replies: 2
- Views: 243
HW 9C.9
With the help of Table 9C.1, determine the coordination number of the metal ion in each of the following complexes: (a) [NiCl4]2–; (b) [Ag(NH3)2]+; (c) [PtCl2(en)2]2+; (d) [Cr(edta)]-
How would we determine the coordination numbers for c and d?
How would we determine the coordination numbers for c and d?
- Fri Dec 06, 2019 7:03 pm
- Forum: Hybridization
- Topic: Hybridization for Triple Bonds
- Replies: 1
- Views: 169
Hybridization for Triple Bonds
If you have a molecule such as C2H2, there would be a triple bond between the carbons. How do you write out the hybridization with the triple bond?
- Mon Dec 02, 2019 7:46 pm
- Forum: Lewis Acids & Bases
- Topic: Long bonds vs Short bonds?
- Replies: 9
- Views: 947
Re: Long bonds vs Short bonds?
Bond strength relates to how easy it is to pull electrons away from an atom. In regards to acids, strong acids are when bonds are further apart, making it easier for the electrons to be donated.
- Mon Dec 02, 2019 7:43 pm
- Forum: Conjugate Acids & Bases
- Topic: Question on Problem 6.21
- Replies: 1
- Views: 282
Question on Problem 6.21
The two strands of the nucleic acid DNA are held together by hydrogen bonding between four organic bases. The structure of one of these bases, thymine, is shown below. (a) How many pro- tons can this base accept? (b) Draw the structure of each conjugate acid that can be formed. (c) Mark with an aste...
- Mon Dec 02, 2019 7:38 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: HW 6D11
- Replies: 2
- Views: 321
HW 6D11
Decide whether an aqueous solution of each of the following salts has a pH equal to, greater than, or less than 7. If pH>7 or pH< 7, write a chemical equation to justify your answer. (a) NH4Br; (b) Na2CO3; (c) KF; (d) KBr; (e) AlCl3; (f) Cu(NO3)2 How would you determine the charge on the reactants i...
- Mon Dec 02, 2019 7:36 pm
- Forum: Identifying Acidic & Basic Salts
- Topic: Homework 6.5
- Replies: 1
- Views: 330
Homework 6.5
Hydrogen peroxide, H2O2, reacts with sulfur trioxide to form peroxomonosulfuric acid, H2SO5, in a Lewis acid–base reaction. (a) Write the chemical equation for the reaction. (b) Draw the Lewis structures of the reactants and product (in the product, one OOH group in sulfuric acid is replaced by an O...
- Mon Dec 02, 2019 7:34 pm
- Forum: Conjugate Acids & Bases
- Topic: HW 6.13
- Replies: 1
- Views: 214
HW 6.13
Draw the Lewis structure of boric acid, B(OH)3. (a) Is resonance important for its description? (b) The proton transfer equilibrium for boric acid is given in a footnote to Table 6C.1. In that reaction does boric acid act as a Lewis acid, a Lewis base, or neither? Justify your answer by using Lewis ...
- Wed Nov 27, 2019 9:45 pm
- Forum: Bronsted Acids & Bases
- Topic: Memorizing the Bronsted Acids and Bases
- Replies: 4
- Views: 351
Re: Memorizing the Bronsted Acids and Bases
It is useful to know the common ones. However, in lecture Dr. Lavelle mentioned that if a problem provides you with an equilibrium constant, it is likely to be a weak acid/base. This may be helpful in making that distinction.
- Wed Nov 27, 2019 9:42 pm
- Forum: Bronsted Acids & Bases
- Topic: Acids vs Bases
- Replies: 5
- Views: 414
Re: Acids vs Bases
There are many distinctions between acids and bases. Some important ones to keep in mind are that acids generally have a pH lower than 7 and bases generally have a pH higher than 7. Acids are usually proton donors and bases are usually proton acceptors.
- Wed Nov 27, 2019 9:39 pm
- Forum: Bronsted Acids & Bases
- Topic: J9
- Replies: 3
- Views: 290
J9
Identify the salt that is produced from the acid–base neutral- ization reaction between (a) potassium hydroxide and acetic acid, CH3COOH; (b) ammonia and phosphoric acid; (c) calcium hydroxide and bromous acid; (d) sodium hydroxide and hydrosul- furic acid, H2S (both H atoms react). Write the comple...
- Wed Nov 27, 2019 9:38 pm
- Forum: Bronsted Acids & Bases
- Topic: Writing Chemical Equations
- Replies: 2
- Views: 251
Writing Chemical Equations
When writing out chemical equations with acids and bases, how do you know what pairs with what?
- Wed Nov 27, 2019 9:36 pm
- Forum: Bronsted Acids & Bases
- Topic: J17 Help
- Replies: 2
- Views: 297
J17 Help
In each of the following salts, either the cation or the anion is a weak acid or a weak base in water. Write the chemical equation for the proton transfer reaction of this cation or anion with water: (a) NaC6H5O (b) KClO (c) C5H5NHCl (d) NH4Br What are the general guidelines for solving this problem...
- Thu Nov 21, 2019 8:01 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: 3F 15
- Replies: 5
- Views: 955
3F 15
Why is it that AsF3 has a higher boiling point than AsF5, despite AsF5 being a bigger molecule? I understand that AsF3 is polar and has dipole-dipole IMF, but do we ignore the molecular weight comparison?
- Thu Nov 21, 2019 7:53 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Boiling Point Comparison
- Replies: 1
- Views: 210
Boiling Point Comparison
Which would have a higher boiling point between C2H5OC2H5 (diethyl ether) and C4H9OH (butanol) and why is this? This is from homework problem 3F 5.
- Thu Nov 21, 2019 6:57 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angle of bent
- Replies: 17
- Views: 1390
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. Both are bent shape, but the bond angles differ depending on the amount of lone pairs.
- Thu Nov 21, 2019 6:55 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: N2H4
- Replies: 1
- Views: 382
N2H4
Could someone describe the shape and bond angles of N2H4?
- Thu Nov 21, 2019 6:54 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Specific Naming Question
- Replies: 4
- Views: 321
Specific Naming Question
For 2F 11A, the molecule we are given is SCl4. This is both trigonal bipyramidal and described as seesaw. Which should we be memorizing? Which one will we be asked for on the test?
- Wed Nov 13, 2019 9:15 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: London Forces and Dipole-Dipole
- Replies: 5
- Views: 368
Re: London Forces and Dipole-Dipole
ALegala_3I wrote:London Dispersion forces act on all molecules and atoms. This includes nonpolar molecules, monoatomic gases, and in molecules that also exhibit dipole-dipole interactions.
Is it true then that London Forces also act on polar molecules as well?
- Wed Nov 13, 2019 9:14 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Determining Polarity
- Replies: 5
- Views: 433
Determining Polarity
How do you determine if a molecule is polar? I know that you would look at the electronegativity, but is there a cut off between what counts as being electronegative enough to be considered polar?
- Wed Nov 13, 2019 9:10 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Molecule Size and Melting Points
- Replies: 6
- Views: 474
Molecule Size and Melting Points
Is it true that bigger molecules have higher melting points? Is this the thought process behind figuring out which would have a higher melting point between CHI3 and CHF3?
- Wed Nov 13, 2019 9:05 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: 3F.5 [ENDORSED]
- Replies: 4
- Views: 364
Re: 3F.5 [ENDORSED]
Looking at the lewis structures may help, and examining the general types of the compound might further clarify which substance has a higher melting point. For example, in (a), between HCl and NaCl, NaCl will have a higher melting point because it's an ionic compound. In (b), Butanol is stronger be...
- Wed Nov 13, 2019 9:02 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: London Forces and Dipole-Dipole
- Replies: 5
- Views: 368
London Forces and Dipole-Dipole
Why is it that London forces always occur when there are dipole-dipole interactions? Will London forces ALWAYS occur when they are dipole-dipole interactions?
- Wed Nov 06, 2019 12:22 pm
- Forum: Trends in The Periodic Table
- Topic: Effect of Charge on an Atom
- Replies: 2
- Views: 262
Effect of Charge on an Atom
What does charge have to do with polarizing power/how polarizable an atom is?
- Wed Nov 06, 2019 12:19 pm
- Forum: Einstein Equation
- Topic: Unit Question
- Replies: 3
- Views: 390
Unit Question
What does the unit MHz mean and how do we convert this to HZ?
- Wed Nov 06, 2019 10:45 am
- Forum: Photoelectric Effect
- Topic: Intensity in Photoelectric Effect
- Replies: 6
- Views: 490
Intensity in Photoelectric Effect
How does intensity play a role in the photoelectric effect?
- Tue Nov 05, 2019 10:20 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Clarification about Unique Quantum Numbers
- Replies: 1
- Views: 127
Clarification about Unique Quantum Numbers
If we are given values for n, l, and ml, is it true that only one orbital can have these specific quantum numbers?
- Tue Nov 05, 2019 10:18 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Quantum Numbers Question
- Replies: 2
- Views: 132
Quantum Numbers Question
If n=2, how many possible orbitals are there?
- Thu Oct 31, 2019 6:52 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: What is the x, y, z?
- Replies: 4
- Views: 1509
Re: What is the x, y, z?
Because the p subshell has 3 different orbitals, the x, y, and z help differentiate between those three.
- Thu Oct 31, 2019 6:51 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Hw problem 2A.13
- Replies: 4
- Views: 189
Re: Hw problem 2A.13
The way that I would approach this problem is by first writing out the ground state electron configurations. The electron would be removed from the last orbital and this is easier to see when you have the configuration written out.
- Thu Oct 31, 2019 6:40 pm
- Forum: DeBroglie Equation
- Topic: Question about Converting Units
- Replies: 3
- Views: 138
Question about Converting Units
How do we convert keV to joules? This was needed for homework problem 5 from section 1B.
- Thu Oct 31, 2019 6:38 pm
- Forum: Properties of Electrons
- Topic: Atomic Spectra
- Replies: 2
- Views: 226
Atomic Spectra
In homework problem 15 from section 1B, part d asks what what kind of electromagnetic radiation was used from a wavelength of 8.8 nm. The answer was x-ray/gamma rays, however, is this something we will have to know for exams?
- Thu Oct 31, 2019 6:25 pm
- Forum: DeBroglie Equation
- Topic: Unit Conversion
- Replies: 2
- Views: 152
Unit Conversion
In homework problem 9 from section 1B, we are given 2 seconds which eventually needs to be converted to joules. The solution manual says that 2 seconds is equal to 64 J. How do we convert seconds to joules?
- Tue Oct 22, 2019 10:09 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configurations for electrons in the D subshell
- Replies: 5
- Views: 323
Re: Electron Configurations for electrons in the D subshell
In this case, you would fill the d subshell. You should try to completely fill or half fill the d subshell because doing this allows the atom to be as stable as possible. Because of this, 4d105s1 would be the correct electron configuration.
- Tue Oct 22, 2019 10:04 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: quantum numbers
- Replies: 3
- Views: 138
Re: quantum numbers
For the ml values, you have to account for the negatives as well. For n=3, the ml values would be -2,-1,0,1,2.
- Tue Oct 22, 2019 10:01 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configuration Specifics
- Replies: 3
- Views: 231
Re: Electron Configuration Specifics
He did this in order to demonstrate Hund's Rule, that electrons fill each orbital before they are paired in one orbital. He was representing each electron in its own orbital instead of just giving the total number of electrons in the subshell. He said that it's BETTER and more specific to do it in ...
- Tue Oct 22, 2019 9:57 am
- Forum: Trends in The Periodic Table
- Topic: Periodic Trend Exceptions
- Replies: 7
- Views: 290
Periodic Trend Exceptions
In lecture, we went over the trends shown in the periodic table, however, Dr. Lavelle mentioned that there were a few exceptions to these trends. Which ones do we have to know and why do they not follow the trends?
- Tue Oct 22, 2019 9:53 am
- Forum: Quantum Numbers and The H-Atom
- Topic: f- orbitals?
- Replies: 4
- Views: 347
Re: f- orbitals?
Being familiar with the f- orbitals can be helpful in having a more holistic understanding of electron configurations and orbitals, but Dr. Lavelle mentioned that we do not have to worry about them for exams. Just be familiar with the s, p, and d blocks.
- Tue Oct 22, 2019 9:50 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Homework Problem Help
- Replies: 5
- Views: 243
Re: Homework Problem Help
An orbital must have 3 quantum numbers, and no two orbitals can have the same quantum numbers. Knowing this, b and d both indicate only 1 orbital because they list 3 quantum numbers. For a and c, since all 3 quantum numbers are not given we must list the other possible numbers to find the number of...
- Tue Oct 22, 2019 9:46 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Homework Problem Help
- Replies: 5
- Views: 243
Re: Homework Problem Help
RichBollini3C wrote:Does anyone know what section problems we should be turning in for homework #4? Is it still quantum?
Yes, homework #4 can be on quantum since we were still doing the quantum unit this week.
- Wed Oct 16, 2019 6:48 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: What is Molarity?
- Replies: 11
- Views: 1063
Re: What is Molarity?
Molarity refers to the concentration of a solution. The formula for finding molarity is M=n/V. This means that to find molarity, you divide the moles of solute by the volume of solution. The units for molarity are mol/L so make sure you watch your units.
- Wed Oct 16, 2019 6:44 pm
- Forum: Properties of Electrons
- Topic: Question About Electron State
- Replies: 3
- Views: 118
Question About Electron State
At the end if today's lecture, Dr. Lavelle described the electron as being in the 2px state. What does he mean by this?
- Wed Oct 16, 2019 6:33 pm
- Forum: Empirical & Molecular Formulas
- Topic: Molecular to Empirical Formula
- Replies: 10
- Views: 1013
Re: Molecular to Empirical Formula
You would only be able to do this if the problem provides the molar mass of the molecular formula. This mass is usually provided in problems if they want you to find the molecular formula. You would then divide the given molar mass by the mass of the empirical formula mass. The answer you get is wha...
- Wed Oct 16, 2019 6:23 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Homework 1B25 Help
- Replies: 1
- Views: 127
Homework 1B25 Help
Can someone explain how to find the answer to this problem?
1B.25) What is the minimum uncertainty in the speed of an electron confined within a lead atom of diameter 350. pm? Model the atom as a one-dimensional box with a length equal to the diameter of the actual atom.
1B.25) What is the minimum uncertainty in the speed of an electron confined within a lead atom of diameter 350. pm? Model the atom as a one-dimensional box with a length equal to the diameter of the actual atom.
- Wed Oct 16, 2019 6:20 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Homework Problem Help
- Replies: 5
- Views: 243
Homework Problem Help
Could someone explain this problem me?
1D23) How many orbitals can have the following quantum numbers in an a tom:(a)n=2, l=1;(b)n=4, l=2, ml=-2; (c)n=2;(d)n=3, l=2, ml=+1?
1D23) How many orbitals can have the following quantum numbers in an a tom:(a)n=2, l=1;(b)n=4, l=2, ml=-2; (c)n=2;(d)n=3, l=2, ml=+1?
- Sat Oct 12, 2019 6:35 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Dilutions
- Replies: 10
- Views: 1098
Re: Dilutions
I would also use the M1*V1=M2*V2 formula in this situation. Plug in the known values and solve for the unknown. The only thing I would say is to be careful of units. Sometimes the units provided and the units asked for are different and you must convert them.
- Sat Oct 12, 2019 6:32 pm
- Forum: Significant Figures
- Topic: Sig Figs in Answer
- Replies: 8
- Views: 462
Re: Sig Figs in Answer
In terms of percentage calculations, I would leave 4 sig figs such as 56.41%, however in answers with decimals I would leave at least have three digits after the decimal, such as 0.379 or 15.255. Remember to keep as many digits as possible when calculating and only round when you get your final answ...
- Sat Oct 12, 2019 6:28 pm
- Forum: Empirical & Molecular Formulas
- Topic: empirical to molecular formula [ENDORSED]
- Replies: 9
- Views: 620
Re: empirical to molecular formula [ENDORSED]
When finding the ratio, divide the total molar mass by the empirical mass. Sometimes, this will give you 1 and that means that the molar mass is the same as the empirical mass and therefore, the formulas are the same as well.
- Sat Oct 12, 2019 6:24 pm
- Forum: Properties of Electrons
- Topic: Electron Energy Levels
- Replies: 8
- Views: 349
Re: Electron Energy Levels
The amount of energy levels depends on what element we are talking about. Each element's atoms have different amounts of energy levels. For example, Hydrogen has electrons in the first energy level and Oxygen has electrons in the second energy level.
- Sat Oct 12, 2019 6:19 pm
- Forum: DeBroglie Equation
- Topic: Knowing Which Equation to Use
- Replies: 4
- Views: 260
Knowing Which Equation to Use
When approaching quantum problems, what is your method to determine which equation we should be using?
- Tue Oct 01, 2019 10:02 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Tips on how to write a formula out from the name
- Replies: 9
- Views: 704
Re: Tips on how to write a formula out from the name
One thing that helps me to write down the formulas from the word is to analyze the prefixes of the words. For example, dioxide means 2 atoms of oxygen because di means 2 and hexafluoride has 6 atoms of fluorine because the prefix hexa means 6. This helps with figuring out what subscript each element...
- Tue Oct 01, 2019 9:51 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Balancing Equations [ENDORSED]
- Replies: 25
- Views: 2088
Re: Balancing Equations [ENDORSED]
An easy way for me to determine what number to multiple a decimal by to get a whole number is to divide 1 by the decimal. For example: If there are 2.5 mols of C, do 1/0.5 = 2. You should multiply the 2.5 mols by 2 to get a whole number (5). If it's a more difficult value, maybe like 2.125 mols of ...
- Tue Oct 01, 2019 9:47 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Formula Units
- Replies: 6
- Views: 396
Re: Formula Units
I was wondering the same thing, but as I was doing practice problems I noticed that you need to use Avogadro's number when you want your answer to be in atoms. This is useful when your units are moles, but you want it to be a certain amount of atoms or molecules.
- Tue Oct 01, 2019 9:44 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Units in Answer
- Replies: 18
- Views: 869
Units in Answer
If a question asks how much of something you will need, should your answer be in grams or moles?
- Tue Oct 01, 2019 9:38 pm
- Forum: Significant Figures
- Topic: Sig Fig Rules
- Replies: 2
- Views: 211
Re: Sig Fig Rules
The rules for multiplication/division and addition/subtraction are similar. For addition/subtraction, the number of decimal places in your answer must be the same as the smallest number of decimal places in your equation. For example, 0.032 + 0.40 = 0.43. For multiplication/division, your answer sho...