sorry if its too late
https://chem.libretexts.org/Bookshelves ... _Chemistry)/
Coordination_Chemistry/Structure_and_Nomenclature_of_Coordination_Compounds/Ligands
hopefully that works
Search found 54 matches
- Thu Dec 05, 2019 1:22 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Difference between chelating ligand and polydentate ligand
- Replies: 4
- Views: 1682
- Tue Dec 03, 2019 4:53 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Atomic Spectra
- Replies: 3
- Views: 360
Re: Atomic Spectra
Usually, if given the energy levels, we will use the Rydberg equation to find frequency and then use E = hv to find the energy.
- Tue Dec 03, 2019 4:48 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: deprotonation and protonation
- Replies: 3
- Views: 421
Re: deprotonation and protonation
To answer the last part of your question, a strong acid will completely dissociate and thus for every mole of acid that gives off a H+ ion, one mole of water is protonated. This ratio will be significantly less for a weak acid.
- Tue Dec 03, 2019 4:47 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: deprotonation and protonation
- Replies: 3
- Views: 421
Re: deprotonation and protonation
Perhaps I am misunderstanding your question, but I am confused by your use of the term protonation. A reaction cannot be protonated- we refer to a given molecule as being either protonated or deprotonated. The concept is fairly simple- if a proton (H+ ion) is added to the compound, it is proton-ated...
- Tue Dec 03, 2019 4:43 pm
- Forum: Sigma & Pi Bonds
- Topic: Unhybridized orbitals.
- Replies: 3
- Views: 374
Re: Unhybridized orbitals.
In an sp3 hybridization state, all of the p orbitals are hybridized (there are three p orbitals, and note that sp3 accounts for all 3). In order for a pi bond to form, there needs to be at least one unhybridized p orbital. This means that sp2 only accounts for 2 out of the 3 p orbitals, meaning ther...
- Tue Dec 03, 2019 4:38 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Difference between chelating ligand and polydentate ligand
- Replies: 4
- Views: 1682
Re: Difference between chelating complex and polydentate ligand
As far as I can tell from doing a bit of research, polydentate is always synonymous with chelating and monodentate with nonchelating. Reading through this page led me to that conclusion. https://chem.libretexts.org/Bookshelves/Inorganic_Chemistry/Supplemental_Modules_(Inorganic_Chemistry)/Coordinati...
- Mon Dec 02, 2019 5:41 pm
- Forum: Lewis Acids & Bases
- Topic: Electron Donating/Accepting
- Replies: 2
- Views: 219
Re: Electron Donating/Accepting
We talked about Lewis acids and bases mostly in the context of coordination compounds, so I'll explain it in that context too. In a coordination compound, the Lewis acid (electron pair acceptor) is the positively charged transition metal. Notice that even though it is positively charged, !! it doesn...
- Mon Dec 02, 2019 5:30 pm
- Forum: Lewis Structures
- Topic: 2.61
- Replies: 2
- Views: 333
Re: 2.61
I believe this is because in the radical carbon actually has one less electron than it needs for an octet, not one more. Because the oxygens are more electronegative, they are the first to 'get' electrons and receive a full octet. Carbon, being less electronegative, has less power to gain the electr...
- Mon Dec 02, 2019 5:22 pm
- Forum: Conjugate Acids & Bases
- Topic: Strong vs Weak
- Replies: 2
- Views: 215
Re: Strong vs Weak
The simplest way to tell that an acid/base is weak is if you are given an eq. constant. This automatically means it is weak because it is not 100% dissociated. Other easy ways include seeing a carboxylic acid group CH3COOH, which indicates an organic/weak acid.
- Mon Dec 02, 2019 5:18 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Strong vs. Weak Acids and Bases
- Replies: 4
- Views: 293
Re: Strong vs. Weak Acids and Bases
I would try to avoid memorizing which things make an acid/base strong or weak and focus on understanding WHY certain traits contribute to strength or weakness. For example, you could just memorize the fact that when you are given an equilibrium constant, it means the acid/base is weak. However, I wo...
- Sun Dec 01, 2019 7:51 pm
- Forum: Identifying Acidic & Basic Salts
- Topic: Salt
- Replies: 5
- Views: 375
Re: Salt
It depends on the salt- certain salts tend to make water more acidic, some make it more alkaline, and some- like table salt- don’t change the pH of water at all because they don’t react with the water to create hydronium or hydroxide ions
- Sun Dec 01, 2019 7:13 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentates and Chelates
- Replies: 2
- Views: 211
Re: Polydentates and Chelates
I think there might be a misunderstanding about the structure of a chelate. A chelate consists of one metal atom and one ligand- a single compound which can have multiple binding sites on the same metal atom. For example, a tetradentate ligand is one single compound that binds to one metal atom in f...
- Sun Dec 01, 2019 7:01 pm
- Forum: Lewis Acids & Bases
- Topic: Bases
- Replies: 4
- Views: 304
Re: Bases
As with acids, if you are given an equilibrium constant in a problem it is a clue that the base in question is not strong, because an equilibrium constant indicates incomplete dissociation. As with the rest of the clues that we learned that indicate a strong versus a weak acid, you can use this to t...
- Sun Dec 01, 2019 6:55 pm
- Forum: Naming
- Topic: Anionic Ligands
- Replies: 1
- Views: 172
Re: Anionic Ligands
So far, if I recall correctly we haven’t yet had a test where we were expected to have memorized the formula for any compound. I doubt the anionic ligands will be an exception.
- Sun Dec 01, 2019 6:52 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligand Binding Sites
- Replies: 1
- Views: 144
Re: Ligand Binding Sites
Ligands with four binding sites are called tetradentate and with 5, pentadentate. they are rare but they exist, for example porphyrin is tetradentate.
- Thu Nov 28, 2019 11:28 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Week 9 homework
- Replies: 11
- Views: 752
Re: Week 9 homework
there was an email sent out that said homework for weeks 9 and 10 is due week 10 in discussion.
- Tue Nov 26, 2019 4:13 pm
- Forum: Sigma & Pi Bonds
- Topic: Question on Test 2
- Replies: 11
- Views: 935
Re: Question on Test 2
The question asked us to identify every bond in the molecule. Every single bond contains one sigma bond, every double bond contains one of each of pi and sigma bonds, and triple bonds (which I don't believe were on that question) contain two pi bonds and one sigma bond. As for the hydrogen bonding c...
- Tue Nov 26, 2019 4:08 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Complexes
- Replies: 2
- Views: 221
Re: Complexes
In class, dr. Lavelle said that we are not expected to be able to tell the difference between the two complexes that contain 4 ligands (tetrahedral and square planar) but that we would need to tell the difference between those two and octahedral complexes, which have 6 ligands. If the naming is conf...
- Sun Nov 24, 2019 8:52 pm
- Forum: Biological Examples
- Topic: Heme complex and biological significance
- Replies: 2
- Views: 246
Re: Heme complex and biological significance
The heme complex is the combination of a porphyrin tetradentate ligand and an iron atom. The heme complex is incorporated into proteins like myoglobin and hemoglobin and they allow the iron molecule to bind to molecular oxygen O2 and transport it along with the protein to various parts of the body.
- Sun Nov 24, 2019 8:44 pm
- Forum: Biological Examples
- Topic: Biological Significance
- Replies: 3
- Views: 281
Biological Significance
Can someone explain what the biological importance of transition metals is? How are they used and what makes them useful?
- Sun Nov 24, 2019 8:38 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Ligands
- Replies: 5
- Views: 353
Re: Ligands
First, look at the overall charge of the compound. Whatever it is, the negative charges of the ions and the positive charges of the transition metal must add to that overall charge. If the overall molecule is neutral, but there are two ligands with a charge of -1 each, then the oxidation state of th...
- Sun Nov 24, 2019 8:33 pm
- Forum: Lewis Acids & Bases
- Topic: Lewis acids + bases and Bronsted acids + bases
- Replies: 6
- Views: 470
Re: Lewis acids + bases and Bronsted acids + bases
lewis acids and bases are defined as electron pair acceptors and receptors respectively. bronsted acids/bases are defined in reference to hydrogen donation or receiving, and bronsted acids donate protons and bases receive them
- Sun Nov 24, 2019 8:28 pm
- Forum: Naming
- Topic: Meaning of Cis and Trans
- Replies: 11
- Views: 925
Meaning of Cis and Trans
Can someone explain the difference between cis and trans and how that applies to cisplatin?
- Fri Nov 15, 2019 10:31 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Determining Bond Angle
- Replies: 3
- Views: 267
Re: Determining Bond Angle
This website has a good chart for conceptualizing and memorizing how the bond angles change for each molecular shape
https://courses.lumenlearning.com/intro ... eometries/
https://courses.lumenlearning.com/intro ... eometries/
- Fri Nov 15, 2019 10:26 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Other shapes
- Replies: 3
- Views: 235
Re: Other shapes
This website has a good chart for memorizing the names of the molecular shapes. When seen in this form it's easier to conceptualize since it becomes clear that they follow a pattern.
https://courses.lumenlearning.com/intro ... eometries/
https://courses.lumenlearning.com/intro ... eometries/
- Fri Nov 15, 2019 10:23 am
- Forum: General Science Questions
- Topic: Test 2
- Replies: 4
- Views: 301
Re: Test 2
The test is on everything after the content covered on the midterm. This includes everything we have learned about molecular structure and VSEPR. Expect to be drawing lots of Lewis structures.
- Fri Nov 15, 2019 10:21 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 problem 3
- Replies: 3
- Views: 298
Re: 3F problem 3
It's about the charge symmetry of the molecule. If the electronegativity is evenly distributed around the central atom then it will not be polar since there is no net charge, but if certain regions attract electrons more strongly then there will be a partial charge and polarity will occur. The way t...
- Fri Nov 15, 2019 10:19 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR Formula Notation
- Replies: 4
- Views: 166
VSEPR Formula Notation
What is the significance of A, X and E in the formula? What does each letter stand for?
- Fri Nov 15, 2019 10:15 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Determining Lone Pair Location
- Replies: 3
- Views: 170
Determining Lone Pair Location
When drawing a Lewis structure, how can one know the location of lone pairs around a central atom? For example, in IF4, how can you ascertain that the lone pairs are on opposite sides of the molecule rather than being adjacent to each other like in ICl3-?
- Sun Nov 03, 2019 10:38 pm
- Forum: Ionic & Covalent Bonds
- Topic: Valence electrons of transition metals
- Replies: 2
- Views: 214
Re: Valence electrons of transition metals
The idea of valence electrons kind of breaks down when you get to elements that contain the D orbitals. Instead, the idea of 'outer electrons' makes more sense, in which you count the number of electrons after the previous noble gas configuration.
- Sun Nov 03, 2019 10:30 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect Module Clarification
- Replies: 1
- Views: 179
Re: Photoelectric Effect Module Clarification
The work function is given to us in kJ/mole, but we need the energy in the form of joules per atom in order to use the formula to calculate for energy. Therefore, we divide by the number of atoms in a mole (Avogadro's number) to convert moles into atoms.
- Sun Nov 03, 2019 10:27 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: formal charge
- Replies: 5
- Views: 369
Re: formal charge
When drawing Lewis structures, it is necessary to make sure that the structure represents the lowest possible energy state. Calculating formal charge is one way to confirm that the structure you have drawn is the lowest possible energy structure for that compound. Atoms will always take the structur...
- Sun Nov 03, 2019 10:23 pm
- Forum: Electronegativity
- Topic: 2D.7
- Replies: 2
- Views: 203
Re: 2D.7
You shouldn't need to calculate the electronegativities of compounds but rather you should look at the relative electronegativities of the elements that make up those compounds. A covalent bond between atoms with similar electronegativites will have more covalent character (and thus less readily dis...
- Sun Nov 03, 2019 10:20 pm
- Forum: Lewis Structures
- Topic: Resonance
- Replies: 5
- Views: 250
Re: Resonance
Resonance occurs in many compounds and is present when multiple correct Lewis structures of equal energy can be drawn. They simply occur often in molecules with oxygen because oxygen readily forms double bonds which are often delocalized causing resonance.
- Sun Nov 03, 2019 10:14 pm
- Forum: Balancing Chemical Reactions
- Topic: Balancing Chemical Equations
- Replies: 4
- Views: 424
Re: Balancing Chemical Equations
after some work, I came up with 6 NH4ClO4 + 10 Al = 5 Al2O3 + 9 H2O + 6 HCl + 3 N2 the key for me was realizing that NH4ClO4 could only occur in even increments (since N2 in the products can only be a whole number for multiples of two) and that the coefficient for NH4ClO4 would always equal the coef...
- Sun Oct 27, 2019 11:21 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge and Covalent Bonds
- Replies: 3
- Views: 192
Re: Formal Charge and Covalent Bonds
This could be incorrect, but I think this has to do with the idea that all bonds have some ionic and some covalent characteristics. A pure covalent bond has a formal charge of 0, and that's why when trying to draw Lewis structures we look for the combinations that have the closest formal charge to 0...
- Sun Oct 27, 2019 11:13 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Subshells
- Replies: 2
- Views: 226
Re: Subshells
for a) 2d cannot exist because the 'd' orbitals do not ever exist in the '2' energy shell. The 'd' orbital first occurs in the 3rd shell, so the first 'd' subshell is 3d. The same logic applies for c) 4g. The first 'g' subshell occurs in the 5th shell, and only 5g,6g,7g etc are possible.
- Sun Oct 27, 2019 11:10 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Memorizing the Equation
- Replies: 4
- Views: 170
Re: Memorizing the Equation
I imagine that on a test we will be given that equation, so if you want to memorize it anyway that's great but you probably won't need to. As far as remembering the equation, I think of it in terms of starting with the 'total' available (V) and subtracting the 'parts' that could be arranged in diffe...
- Wed Oct 16, 2019 11:05 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Stern and Gerlach
- Replies: 5
- Views: 276
Re: Stern and Gerlach
Essentially the experiment proved that there was an intrinsic, binary property of an electron that influenced its behavior in a magnetic field. This property was termed the magnetic spin of the electron, and is the fourth quantum number used to describe the state of an electron in an atom. It can be...
- Tue Oct 15, 2019 6:41 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: question on 1A.11
- Replies: 1
- Views: 102
Re: question on 1A.11
I doubt that we would need to memorize it. However, the concept is pretty simple- the Paschen and Brackett series simply represent transitions (of an electron in a hydrogen atom) from high energy levels (n=5,6, etc) to the n=3 and n=4 energy levels respectively. This is simply a continuation of the ...
- Tue Oct 15, 2019 6:33 pm
- Forum: Properties of Electrons
- Topic: 1B.3
- Replies: 3
- Views: 186
Re: 1B.3
The observation that indicates particle like behavior in EM radiation is the photoelectric effect. Recall that the experimenters were expecting light to act like a wave, and therefore they expected that increasing the intensity of the light would cause electrons to be ejected even if there was no ch...
- Tue Oct 15, 2019 6:24 pm
- Forum: Properties of Light
- Topic: Balmer and Lyman
- Replies: 1
- Views: 81
Re: Balmer and Lyman
The Balmer and Lyman series represent the wavelengths of light emitted when an electron in a hydrogen atom transitions from a high energy level (n=3,4,5,etc) to the n=1 energy level (Lyman) or the n=2 energy level (Balmer). Since more energy is released when the electron transfers to the lowest ener...
- Tue Oct 15, 2019 6:12 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Uncertainty Measurement Clarification
- Replies: 2
- Views: 76
Uncertainty Measurement Clarification
When inputting a value for uncertainty into the equation, do we use the full range of values or the "plus or minus" value? For example, say that we are given an uncertainty for position of +- 5 meters. Do we input an uncertainty of 5 for the position, or the range of uncertainty which woul...
- Thu Oct 10, 2019 10:26 am
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: HW question spectral line
- Replies: 1
- Views: 70
Re: HW question spectral line
When looking at the absorption spectrum of a gas, the gas itself is not emitting any light. White light is shone through the sample and the gas absorbs some wavelengths while leaving the rest, so the result being detected is a nearly complete spectrum with only a few wavelengths missing. In an emiss...
- Thu Oct 10, 2019 10:11 am
- Forum: Photoelectric Effect
- Topic: HW 1B15
- Replies: 1
- Views: 109
Re: HW 1B15
This is a question asking about the quantum principle of the wavelength of matter, which can be found using De Broglie's equation, l (wavelength) = h / mv where h is Plank's constant, m is the mass of the object and v is it's velocity. We know that the mass of an electron is 9.109×10^31 kg, Plank's ...
- Thu Oct 10, 2019 9:59 am
- Forum: Empirical & Molecular Formulas
- Topic: Question E9
- Replies: 4
- Views: 260
Re: Question E9
You can simply look it up, but the naming conventions are useful to memorize. "Sulfate" represents the ion SO4 which has a 2- charge. Since Magnesium has a charge of 2+, it pairs 1:1 with a sulfate ion, so the formula for magnesium sulfate is MgSO4. "Hydrate" indicates a water mo...
- Mon Oct 07, 2019 4:47 pm
- Forum: Limiting Reactant Calculations
- Topic: Homework Problem L.1
- Replies: 2
- Views: 225
Re: Homework Problem L.1
This problem asks you to infer that the limiting reactant will be ClO2 -- since the amount of the other reactant is not mentioned we can assume it is in excess. Since we already know how many moles of the limiting reactant we have (0.3), we can easily calculate how much of the product we will produc...
- Mon Oct 07, 2019 4:37 pm
- Forum: Empirical & Molecular Formulas
- Topic: Empirical Formula Help [ENDORSED]
- Replies: 7
- Views: 920
Re: Empirical Formula Help [ENDORSED]
As an example to answer your question, let's say that you were asked to find the empirical formula for a compound containing 52.14% carbon, 13.2% hydrogen and 34.73% oxygen. It sounds like you know how to convert these percentages to molar amounts, so I'm going to skip that part and assume that you ...
- Wed Oct 02, 2019 10:33 am
- Forum: Molarity, Solutions, Dilutions
- Topic: G.5- Mixtures and Solutions
- Replies: 5
- Views: 709
Re: G.5- Mixtures and Solutions
First, we find out how many moles of sodium carbonate are in 2.111 g so that we can find the molarity of the sodium carbonate solution. We divide the mass by sodium carbonate's molecular weight 2.111/106 to find that we have 0.01992 moles of sodium carbonate. To find the molarity, we divide the mole...
- Tue Oct 01, 2019 4:40 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Help on G. 21
- Replies: 2
- Views: 132
Re: Help on G. 21
You were correct in dividing the NaCl and the KCl by the molar mass of each salt, because by doing this you were finding how many moles of the compound were in each sample. Since there is exactly one chlorine atom per molecule of each salt, you can correctly assume that the moles of NaCl dissolved =...
- Tue Oct 01, 2019 4:23 pm
- Forum: Balancing Chemical Reactions
- Topic: Tips on what number to multiply the entire equation if needed
- Replies: 8
- Views: 1682
Re: Tips on what number to multiply the entire equation if needed
For simple equations, you will usually only have one number in the denominator of your stoichiometric coefficients. Simply multiply the coefficient of every molecule in the reaction by the number in the denominator to finalize the balanced reaction. If there are multiple numbers in the denominators ...
- Tue Oct 01, 2019 4:12 pm
- Forum: Limiting Reactant Calculations
- Topic: HW problem L1
- Replies: 3
- Views: 222
Re: HW problem L1
Since the molar ratio of the reactant to the product is 6:1 we can see that for every six moles of the reactant, we will produce one mole of the product. Therefore we can divide .3 moles by 6 to find that the reaction will produce .05 moles of product, Br2. To find the mass of .05 moles of Br2, simp...
- Mon Sep 30, 2019 9:27 pm
- Forum: Limiting Reactant Calculations
- Topic: Limiting Reactant Calculations in Two-Step Reactions
- Replies: 4
- Views: 773
Re: Limiting Reactant Calculations in Two-Step Reactions
@Jessica_Tran you did the problem right, but you forgot to include the H2 produced by the first stage of the reaction!
- Mon Sep 30, 2019 9:26 pm
- Forum: Limiting Reactant Calculations
- Topic: Limiting Reactant Calculations in Two-Step Reactions
- Replies: 4
- Views: 773
Re: Limiting Reactant Calculations in Two-Step Reactions
Since the molar ratio of CH4 to H2O is 1:1, we start by seeing how many moles of CH4 we have to begin with, and the same number of moles of water will be consumed by the first reaction. To find the moles of methane (CH4) we divide the amount in grams (.036) by the molar mass of methane (16.04) and f...