This website gives a lot of great tips when naming compounds: https://chem.libretexts.org/Bookshelves ... istry_(Tro)/05%3A_Molecules_and_Compounds/5.06%3A_Nomenclature-_Naming_Compounds
Hope it helps!
Search found 51 matches
- Thu Dec 17, 2020 9:59 am
- Forum: Naming
- Topic: Naming a compound
- Replies: 10
- Views: 3664
- Thu Dec 17, 2020 9:58 am
- Forum: Dipole Moments
- Topic: Negative Pole
- Replies: 7
- Views: 783
Re: Negative Pole
Determining the negative pole is dependent on the dipole moment present between the two elements, which is dependent on the electronegativity, and its magnitude is related to their overall difference in electronegativity.
- Thu Dec 17, 2020 9:55 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: H20
- Replies: 6
- Views: 622
Re: H20
H20 contains both lone pairs on the oxygen but only one binding site between H2O and the central metal, therefore it is monodentate.
- Thu Dec 17, 2020 9:54 am
- Forum: Bond Lengths & Energies
- Topic: Bond length
- Replies: 9
- Views: 946
Re: Bond length
Bond length is determined by the number of bonded electrons (the bond order). The higher the bond order, the stronger the pull between the two atoms and thus the shorter the bond length. Generally, the length of the bond between two atoms is approximately the sum of the covalent radii of the two ato...
- Thu Dec 17, 2020 9:52 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Shape
- Replies: 6
- Views: 504
Re: Shape
Most often if asked to give the shape of the molecule, I would state its molecular shape unless asked to say otherwise.
- Thu Dec 17, 2020 9:47 am
- Forum: Quantum Numbers and The H-Atom
- Topic: The Stern and Gerlach Experiment
- Replies: 2
- Views: 275
Re: The Stern and Gerlach Experiment
We most likely don't need to know the specific details of the Stern and Gerlach Experiment. I think Professor Lavelle wanted to describe how the electron spin developed and just intended for us to use this information as a reference.
- Thu Dec 17, 2020 9:34 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: A question from the final
- Replies: 5
- Views: 488
Re: A question from the final
In this molecule, the central S atom is bonded to 1 S and 3 O with no lone pairs, so there are 4 regions of electron density which must be arranged tetrahedrally.
- Thu Dec 17, 2020 9:32 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: calculating pH or Poh
- Replies: 5
- Views: 988
Re: calculating pH or Poh
-pH is the -log of the H+ ion concentration.
-pOH is the -log of the OH- ion concentration.
-Ka is essentially an equilibrium constant for the dissociation of water in the presence of an acid.
-pKa indicates the strength and/or lack thereof of an acid
-pOH is the -log of the OH- ion concentration.
-Ka is essentially an equilibrium constant for the dissociation of water in the presence of an acid.
-pKa indicates the strength and/or lack thereof of an acid
- Thu Dec 17, 2020 9:26 am
- Forum: Industrial Examples
- Topic: Cisplatin Vs. Transplatin
- Replies: 7
- Views: 1551
Re: Cisplatin Vs. Transplatin
Yes, and these differences between the two occur because one contains cis isomers and one contains trans isomers.
- Thu Dec 17, 2020 9:24 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Seesaw vs. trigonal pyramidal
- Replies: 22
- Views: 2450
Re: Seesaw vs. trigonal pyramidal
No, seesaw and trigonal pyramidal are not the same. The seesaw shape has a lone pair in the equatorial position whilst the trigonal pyramidal shape does not have a lone pair.
- Thu Dec 17, 2020 4:23 am
- Forum: Bronsted Acids & Bases
- Topic: Amphoteric compounds
- Replies: 8
- Views: 631
Re: Amphoteric compounds
This layout of the periodic table is helpful in visually pointing out amphoteric compounds:
- Thu Dec 17, 2020 4:19 am
- Forum: Calculating the pH of Salt Solutions
- Topic: pH formula?
- Replies: 69
- Views: 4659
Re: pH formula?
The pH formula is -log[H+], and to derive it, you should know how to determine its relation to pKa and pOH.
- Thu Dec 17, 2020 4:15 am
- Forum: Polyprotic Acids & Bases
- Topic: Which one is more acidic: H3PO3 or H3PO4
- Replies: 17
- Views: 1364
Re: Which one is more acidic: H3PO3 or H3PO4
H3PO3 is more polar, so the bonds between hydrogen and oxygen will be weaker, making the hydrogen ions easier to remove. In this way, H3PO3 is more acidic than H3PO4.
- Thu Dec 17, 2020 4:12 am
- Forum: Electronegativity
- Topic: Electronegativity Trends
- Replies: 12
- Views: 1202
Re: Electronegativity Trends
So according to these trends, what would the most electronegative element be? Fluorine?
- Thu Dec 17, 2020 4:09 am
- Forum: Quantum Numbers and The H-Atom
- Topic: London Dispersion Forces
- Replies: 12
- Views: 975
Re: London Dispersion Forces
London dispersion forces are weak intermolecular forces, as they are temporary attractive forces that occur when the electrons in two nearby atoms occupy positions that thus cause the atoms to form temporary dipoles.
- Thu Dec 17, 2020 4:04 am
- Forum: Quantum Numbers and The H-Atom
- Topic: Why does nickel have an expanded octet?
- Replies: 6
- Views: 768
Re: Why does nickel have an expanded octet?
Since nickel contains 2 electrons from the 4s subshell and 8 electrons from the 3d subshell, it can form up to 10 bonds in a coordination compound (hence the reason for the expanded octet).
- Thu Dec 17, 2020 4:00 am
- Forum: Conjugate Acids & Bases
- Topic: Sapling #3
- Replies: 14
- Views: 1009
Re: Sapling #3
Nope! The conjugate acid for HSO4- is H2SO4-, so the conjugate base would be SO4.
- Thu Dec 17, 2020 3:56 am
- Forum: Air Pollution & Acid Rain
- Topic: Acid Rain
- Replies: 24
- Views: 4057
Re: Acid Rain
Acid rain is created when compounds like sulfur dioxide and nitrogen oxide are released into the air and mix with substances like H2O, O2, etc. These form acidic pollutants in the form of acid rain.
- Thu Dec 17, 2020 3:53 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Difference between pH and pOH
- Replies: 12
- Views: 1229
Re: Difference between pH and pOH
For pH and pKa: pH measures the hydrogen ion concentration of a solution, which pKa helps predict what a molecule will do at a certain pH level (i.e. what does the pH need to be in order for a chemical species to either donate or accept a proton?)
- Thu Dec 17, 2020 3:49 am
- Forum: Sigma & Pi Bonds
- Topic: Pi Bonds
- Replies: 18
- Views: 901
Re: Pi Bonds
Yes, pi bonds are covalent chemical bonds. Two lobes of an orbital overlap on another atom laterally. They typically form in double and triple bonds, but rarely in single bonds.
- Thu Dec 17, 2020 3:46 am
- Forum: Amphoteric Compounds
- Topic: More likely acid or base
- Replies: 4
- Views: 487
Re: More likely acid or base
I don't think it necessarily depends on the compound itself, but rather the solutions it may be immersed in.
- Thu Dec 17, 2020 3:44 am
- Forum: Naming
- Topic: Naming Coordination Complexes
- Replies: 4
- Views: 466
Re: Naming Coordination Complexes
This site really helps me in determining how to name coordination complexes: https://chem.libretexts.org/Bookshelves/Inorganic_Chemistry/Modules_and_Websites_(Inorganic_Chemistry)/Coordination_Chemistry/Structure_and_Nomenclature_of_Coordination_Compounds/Nomenclature_of_Coordination_Complexes. Hope...
- Thu Dec 17, 2020 3:40 am
- Forum: Sigma & Pi Bonds
- Topic: Bond length [ENDORSED]
- Replies: 13
- Views: 984
Re: Bond length [ENDORSED]
The length of the bond can be determined by the number of bonded electrons (i.e. the bond order). The higher the bond order, the stronger the pull between the two atoms and the shorter the bond length. The length of the bond between two atoms can also be thought of as the sum of the covalent radii o...
- Thu Dec 17, 2020 3:37 am
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Textbook Problem J.17
- Replies: 3
- Views: 722
Re: Textbook Problem J.17
The anion of NaC6H5O is basic in nature. Therefore, the chemical equation for its proton transfer is: C6H50- + H2O ---> C6H5OH + OH-. Hence, NaC6H5O is a salt of strong base and weak acid.
- Thu Dec 17, 2020 3:30 am
- Forum: Lewis Acids & Bases
- Topic: ph v. pka
- Replies: 4
- Views: 325
Re: ph v. pka
For example: the lower the pKa, the stronger the acid and the greater its ability to donate protons.
- Thu Dec 17, 2020 3:27 am
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Acids in Water
- Replies: 3
- Views: 221
Re: Acids in Water
Because Cl- is more electronegative, it will not share an electron with H+ in order to form a stable H2O bond.
- Thu Dec 17, 2020 3:24 am
- Forum: Lewis Acids & Bases
- Topic: ph v. pka
- Replies: 4
- Views: 325
Re: ph v. pka
pH measures the hydrogen ion concentration of a solution, which pKa helps predict what a molecule will do at a certain pH level (i.e. what does the pH need to be in order for a chemical species to either donate or accept a proton?)
- Mon Dec 07, 2020 1:48 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Electronegativity/acidity
- Replies: 5
- Views: 345
Re: Electronegativity/acidity
Across the periodic table, acidity increases with electronegativity. Down the periodic table, acidity increases with size.
- Mon Dec 07, 2020 1:38 pm
- Forum: Air Pollution & Acid Rain
- Topic: Carbon dioxide
- Replies: 6
- Views: 754
Re: Carbon dioxide
Respiratory acidosis occurs when the lungs can't remove all of the CO2 the body produces. This causes bodily fluids, especially the blood, to become too acidic
- Mon Dec 07, 2020 12:30 pm
- Forum: Lewis Acids & Bases
- Topic: Salts as Acids and Bases
- Replies: 4
- Views: 430
Re: Salts as Acids and Bases
The following link is a great resource and describes some guiding principles in determining if salt solutions are acidic or basic:
https://chem.libretexts.org/Bookshelves ... nd_Decoste)/7%3A_Acids_and_Bases/7.08_Acid-Base_Properties_of_Salts
https://chem.libretexts.org/Bookshelves ... nd_Decoste)/7%3A_Acids_and_Bases/7.08_Acid-Base_Properties_of_Salts
- Mon Dec 07, 2020 10:49 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Geometry for coordination compound
- Replies: 3
- Views: 271
Re: Geometry for coordination compound
While every geometry has a specific coordination number, every complex can have several possible geometries. There isn't a one-to-one correspondence between coordination number and geometry!!
- Mon Dec 07, 2020 10:43 am
- Forum: Electronegativity
- Topic: Acidity
- Replies: 4
- Views: 446
Re: Acidity
Across the periodic table, acidity increases with electronegativity. Down the periodic table, acidity increases with size.
- Mon Dec 07, 2020 10:34 am
- Forum: Naming
- Topic: Sapling Question #5
- Replies: 3
- Views: 198
Re: Sapling Question #5
Co is surrounded by 2 en and 2 CO en is a bidentate ligand so, the coordination number would equal 2*2+2, so 6 Br is outside the coordination sphere
- Mon Dec 07, 2020 10:30 am
- Forum: *Molecular Orbital Theory Applied To Transition Metals
- Topic: Orbitals and coordination numbers
- Replies: 2
- Views: 634
Re: Orbitals and coordination numbers
The coordination sphere consists of the central metal ion/atom and its attached ligands. Brackets in a formula enclose the coordination sphere, but those outside the brackets aren't part of the coordination sphere. The coordination number of the central metal ion or atom is the number of donor atoms...
- Sun Nov 29, 2020 11:58 pm
- Forum: Hybridization
- Topic: Hybrid Orbitals
- Replies: 7
- Views: 510
Re: Hybrid Orbitals
This link helped me a lot when learning about hybrid orbitals: https://chem.libretexts.org/Bookshelves ... _Chemistry)/Fundamentals/Hybrid_Orbitals
- Sun Nov 29, 2020 11:47 pm
- Forum: Resonance Structures
- Topic: Resonance Structures
- Replies: 7
- Views: 721
Re: Resonance Structures
Resonance structures have the same number of electrons, although placement of those electrons may still change.
- Sun Nov 29, 2020 11:44 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Cyclic Structure
- Replies: 3
- Views: 268
Re: Cyclic Structure
A molecule has a cyclic structure if its atoms form a loop or ring.
- Sun Nov 29, 2020 11:41 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond angles
- Replies: 5
- Views: 473
Re: Bond angles
No, the trigonal bipyramidal arrangement has 90 and 120 degree angles also.
- Sun Nov 29, 2020 11:37 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Sapling #6
- Replies: 2
- Views: 177
Re: Sapling #6
In the XeF2 molecule, the central atom is Xe and is surrounded by two fluorine atoms and 3 lone pair of electrons. The total number of groups surrounded by the Xe atom is 5. So, the hybridization of the molecules is sp3d.
- Sun Nov 22, 2020 9:11 pm
- Forum: Dipole Moments
- Topic: Dipole-Dipole
- Replies: 10
- Views: 511
Re: Dipole-Dipole
You look at an atom's electronegativity. If the difference is in the range between 0.4 and 1.7, then the molecule is considered polar and if a molecule is polar, it is likely caused by a dipole-dipole interaction. Polar molecules contain polar bonds that create dipoles caused by a positive/negative ...
- Sun Nov 22, 2020 9:06 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Expanded Octets
- Replies: 9
- Views: 458
Re: Expanded Octets
Yes, as long as they are using d-orbitals and are in the third period, they have an expanded octet
- Sun Nov 22, 2020 8:57 pm
- Forum: Coordinate Covalent Bonds
- Topic: Covalent Bond Character
- Replies: 7
- Views: 823
Re: Covalent Bond Character
Ionic bonding can still have covalent character where electrons are shared more equally between two atoms. Even if there is covalent character, the ionic character has to be more prevalent for ionic bonding to occur. This means that there has to be greater electronegativity and thus more polarity.
- Sun Nov 22, 2020 8:52 pm
- Forum: Hybridization
- Topic: Double bonds structures
- Replies: 5
- Views: 332
Re: Double bonds structures
If these atoms are essentially locked into position in the presence of pi double (or triple) bonds, then would they even have resonance structures?? Hi! I had a question about something Dr. Lavelle mentioned in lecture, that if an atom has a double bond, then it cannot move around and it is locked i...
- Sun Nov 22, 2020 8:46 pm
- Forum: Hybridization
- Topic: HW Question
- Replies: 3
- Views: 148
Re: HW Question
Yes, you find the geometry and from there number of bonds around a certain atom. This gives the hybridization
Kaitlyn Hernandez 2E wrote:Lillian Ma 1L wrote:I believe that it is a sp3 hybridization.
How can we figure out the hybridization of an atom? Do we just need to determine the shape through the VSEPR model?
- Sun Nov 22, 2020 8:43 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angles
- Replies: 21
- Views: 819
Re: Bond Angles
There's no specific calculation method, but drawing the Lewis structure and determining the number of bonding/nonbonding groups can help determine the geometrical shape and thus the bond angles.
- Sun Nov 22, 2020 8:38 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Sapling #13
- Replies: 3
- Views: 197
Re: Sapling #13
In the cyclohexane (C6H12) structure, there are 6 C atoms and 12 H atoms. Each C has 4 sigma bonds, so the geometry around each C atoms will be tetrahedral.
- Sun Nov 22, 2020 8:33 pm
- Forum: Dipole Moments
- Topic: Dipole Moments Cancelling out
- Replies: 10
- Views: 1176
Re: Dipole Moments Cancelling out
If the polar bonds are arranged symmetrically, this means the positive and negative charges coincide and thus no dipole moment occurs. The bond dipoles essentially cancel and the molecule becomes nonpolar.
- Sun Nov 22, 2020 8:28 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Sapling Week 7 & 8 HW Question 10
- Replies: 4
- Views: 232
Re: Sapling Week 7 & 8 HW Question 10
Yes, I think it's important to note that negative pole depends on the electronegativity of all three atoms (not just two) making up the bonds. Comparing all three and assessing which incurs the largest electronegativity helps determine which two the negative pole lands between.
- Sun Nov 22, 2020 8:16 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Textbook Problem 2E. 5
- Replies: 3
- Views: 380
Re: Textbook Problem 2E. 5
Can this ion also be drawn as a resonance structure combining all of the Lewis structures you mentioned?
- Fri Oct 09, 2020 1:01 pm
- Forum: Balancing Chemical Reactions
- Topic: Combining Atoms
- Replies: 7
- Views: 334
Re: Combining Atoms
Brett Lieuallen 2A wrote:How would you decide which charge to use for various atoms that can have different charges?
Are you referring to polyatomic ions?
- Fri Oct 09, 2020 12:46 pm
- Forum: Balancing Chemical Reactions
- Topic: Types of Chemical Reactions
- Replies: 8
- Views: 484
Re: Types of Chemical Reactions
I feel like since those are high school review topics, we won't necessarily be responsible for those concepts in this class as I'm sure Dr. Lavelle is more concerned with us advancing in our understanding of chemistry. If anything though, I think he would post it as one of the Audio-Visual Focus Top...