Search found 50 matches

by 605208780
Fri Dec 06, 2019 11:14 pm
Forum: Ionic & Covalent Bonds
Topic: intermolecular vs intramolecular
Replies: 7
Views: 77

Re: intermolecular vs intramolecular

Intermolecular bonding is between multiple molecules. Intramolecular bonding is within a single molecule.
by 605208780
Fri Dec 06, 2019 11:03 pm
Forum: Conjugate Acids & Bases
Topic: Oxoacids
Replies: 4
Views: 74

Re: Oxoacids

An oxyacid is an acid that contains oxygen and contains at least one other element. It also has at least one hydrogen atom bonded to oxygen.
by 605208780
Fri Dec 06, 2019 11:02 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: what is a ligand?
Replies: 7
Views: 61

Re: what is a ligand?

A ligand is an ion or molecule attached to a metal atom and donates electrons.
by 605208780
Fri Dec 06, 2019 10:59 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Weak vs Strong acids and bases
Replies: 6
Views: 41

Re: Weak vs Strong acids and bases

A strong base would have a higher pH due to it accepting more protons. A weak base would have a lower pH.
by 605208780
Fri Dec 06, 2019 10:57 pm
Forum: Polyprotic Acids & Bases
Topic: Definition of Polyprotic
Replies: 5
Views: 67

Re: Definition of Polyprotic

A polyprotic acid can donate more than one proton. A polyprotic base can accept more than one proton.
by 605208780
Tue Dec 03, 2019 1:09 pm
Forum: Octet Exceptions
Topic: 2.27
Replies: 7
Views: 77

Re: 2.27

Yes. There are only radicals when there is an odd number of electrons.
by 605208780
Tue Dec 03, 2019 1:05 pm
Forum: Administrative Questions and Class Announcements
Topic: Studying for the Final [ENDORSED]
Replies: 11
Views: 204

Re: Studying for the Final [ENDORSED]

I would suggest going to the student activities center and trading in your old test for other classes and seeing if there are any old finals for 14a!
by 605208780
Tue Dec 03, 2019 1:05 pm
Forum: Electronegativity
Topic: Electronegativity
Replies: 12
Views: 112

Re: Electronegativity

If the electronegativity is higher, the bond is stronger. It also means the bond is shorter.
by 605208780
Tue Dec 03, 2019 1:04 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxalate and CO3 2- as a polydentate
Replies: 3
Views: 36

Re: Oxalate and CO3 2- as a polydentate

I think it would always be the single bonded ones due to the absense of the pi bond but I am not too sure
by 605208780
Tue Dec 03, 2019 1:02 pm
Forum: Dipole Moments
Topic: Hydrogen Bonding
Replies: 17
Views: 245

Re: Hydrogen Bonding

Yes. These are the only atoms that can make a hydrogen bond. Hydrogen can make other bonds with other atoms.
by 605208780
Tue Dec 03, 2019 1:01 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: pKa vs Ka
Replies: 6
Views: 40

Re: pKa vs Ka

Okay I talked to someone about this question and I also found out that pKa is preferred it is the log version of the number and therefore easier to compare and use rather than the scientific powers of Ka
by 605208780
Tue Dec 03, 2019 12:58 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Value of Kw?
Replies: 4
Views: 37

Re: Value of Kw?

Yes. This is the constant value that should always be used.
by 605208780
Tue Dec 03, 2019 12:57 pm
Forum: Polyprotic Acids & Bases
Topic: Why is HClO4 stronger than H3PO4?
Replies: 3
Views: 39

Re: Why is HClO4 stronger than H3PO4?

Chlorine has a higher electronegativity than phosphorus, so it pulls the oxygen atom electrons towards itself with greater force than phosphorus. The fact that chlorine has a higher pull means that oxygen electrons become less accessible for the hydrogen atoms to "share", making it less fa...
by 605208780
Tue Dec 03, 2019 12:54 pm
Forum: Trends in The Periodic Table
Topic: Ionization Energy
Replies: 7
Views: 118

Re: Ionization Energy

the second ionization energy of Mg is larger than the first because it takes more energy to remove an electron from a positively charged ion than from a neutral atom
by 605208780
Tue Dec 03, 2019 12:54 pm
Forum: Hybridization
Topic: Conceptual meaning of hybridization
Replies: 3
Views: 38

Conceptual meaning of hybridization

What happens in hybridization? Like why does it happen? Does it lower the energy of the molecule?
by 605208780
Tue Dec 03, 2019 12:53 pm
Forum: Trends in The Periodic Table
Topic: Shielding
Replies: 8
Views: 92

Re: Shielding

Shielding electrons are the electrons in the energy levels between the nucleus and the valence electrons
by 605208780
Tue Dec 03, 2019 12:50 pm
Forum: Trends in The Periodic Table
Topic: Question
Replies: 17
Views: 208

Re: Question

Electronegativity is how much an atom attracts electrons. Ionization energy is needed to remove electrons from atoms.
by 605208780
Tue Dec 03, 2019 12:50 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Where to minimize formal charge
Replies: 4
Views: 48

Where to minimize formal charge

Is there a specific atom in a molecule that we should try and get to have a 0 formal charge? If there is a charge we can't avoid where should we put it
by 605208780
Tue Dec 03, 2019 12:48 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Resonance and Formal Charge
Replies: 4
Views: 56

Resonance and Formal Charge

Why do different resonance structures have different formal charges and how do we know which is the major contributor.
by 605208780
Tue Dec 03, 2019 12:47 pm
Forum: Lewis Acids & Bases
Topic: diff b/w lewis acid and base
Replies: 12
Views: 98

Re: diff b/w lewis acid and base

Lewis acids accept electrons while bases donate electrons. Acids are more positive and bases are more negative.
by 605208780
Tue Dec 03, 2019 12:46 pm
Forum: Hybridization
Topic: Conjugation and hybridization
Replies: 1
Views: 22

Conjugation and hybridization

Hey, could someone please explain to me how conjugation affects hybridization and if we will have to use this concept explicitly.
by 605208780
Tue Dec 03, 2019 12:40 pm
Forum: Hybridization
Topic: Triple Bond Hybridization
Replies: 4
Views: 24

Triple Bond Hybridization

Hello! Could someone explain why a triple bond has a hybridization of sp
by 605208780
Tue Dec 03, 2019 12:37 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: dipole dipole
Replies: 7
Views: 48

Re: dipole dipole

Yes. Both of the molecules have to be polar. The partial charges created by the dipoles makes it polar.
by 605208780
Tue Dec 03, 2019 12:34 pm
Forum: Bond Lengths & Energies
Topic: conjugation
Replies: 3
Views: 48

conjugation

How does the conjugation of a molecule affect its energy and bond lengths
by 605208780
Tue Dec 03, 2019 12:33 pm
Forum: Bond Lengths & Energies
Topic: Pi and Sigma Bonds and their affect on energy
Replies: 3
Views: 47

Pi and Sigma Bonds and their affect on energy

Will someone please explain how pi bonds and their p orbitals cause a lower energy state
by 605208780
Tue Dec 03, 2019 12:29 pm
Forum: Sigma & Pi Bonds
Topic: Molecular Shape
Replies: 11
Views: 74

Re: Molecular Shape

No but they determine whether or not the bond is able to rotate.
by 605208780
Tue Dec 03, 2019 12:27 pm
Forum: Dipole Moments
Topic: Melting points
Replies: 15
Views: 144

Re: Melting points

A double bond does not affect the melting point. The intermolecular force is what affects the melting point.
by 605208780
Tue Dec 03, 2019 12:27 pm
Forum: Sigma & Pi Bonds
Topic: Orbitals and sigma/pi bonds
Replies: 2
Views: 41

Re: Orbitals and sigma/pi bonds

So basically pi bonds are formed because the side-by-side overlap of p orbitals leads to a lower-energy state than if there were no overlap so it depends on the valence electrons of the atoms and the energy state certain bonds create
by 605208780
Tue Dec 03, 2019 12:22 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: pKa vs Ka
Replies: 6
Views: 40

pKa vs Ka

Why is pKa preffered over Ka?
by 605208780
Tue Dec 03, 2019 12:20 pm
Forum: Dipole Moments
Topic: dipole moments
Replies: 6
Views: 70

Re: dipole moments

By definition Molecules that contain dipoles are called polar molecules, so yes the two can't be separated.
by 605208780
Tue Dec 03, 2019 12:17 pm
Forum: Lewis Acids & Bases
Topic: Oxoacids
Replies: 6
Views: 47

Re: Oxoacids

it is a compound that contains hydrogen, oxygen, and at least one other element, with at least one hydrogen atom bond to oxygen that can dissociate to produce the H⁺ cation and the anion of the acid
by 605208780
Tue Dec 03, 2019 12:16 pm
Forum: Dipole Moments
Topic: dipole moments
Replies: 6
Views: 70

Re: dipole moments

Yes. Polar molecules have a permanent dipole moment. Nonpolar molecules can have dipole moments that cancel each other out.
by 605208780
Tue Dec 03, 2019 12:12 pm
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Stronger Acid 6C.21
Replies: 3
Views: 57

Re: Stronger Acid 6C.21

Out of acetic acid and formic acid, formic acid is considered stronger because the CH3 in acetic acid is electron donating. The CH3 actually contributes electron density towards the O-H bond, making it harder to remove the H, and making acetic acid a weaker acid than formic acid
by 605208780
Tue Dec 03, 2019 12:10 pm
Forum: General Science Questions
Topic: Exam Subjects
Replies: 5
Views: 120

Re: Exam Subjects

I think the exam will consist of problems that incorporate topics we have learned throughout the year with an emphasis on later topics that weren't included on our last test!
by 605208780
Tue Dec 03, 2019 12:09 pm
Forum: *Particle in a Box
Topic: Hydrogen Atom
Replies: 7
Views: 113

Re: Hydrogen Atom

the change in energy of a hydrogen atom is positive
by 605208780
Tue Dec 03, 2019 12:07 pm
Forum: Ionic & Covalent Bonds
Topic: ligands
Replies: 5
Views: 90

Re: ligands

Ligands are ions or neutral molecules that bond to a central metal atom or ion. Ligands act as Lewis bases (electron pair donors), and the central atom acts as a Lewis acid (electron pair acceptor).
by 605208780
Tue Dec 03, 2019 12:07 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number
Replies: 6
Views: 63

Re: Coordination Number

Your best bet is to identify the central atom in the chemical formula (usually a transition metal) and then adding the number of atoms of the nearest atom/molecule/ions connected to it
by 605208780
Tue Dec 03, 2019 12:04 pm
Forum: Lewis Acids & Bases
Topic: Bronsted v Lewis acids and bases
Replies: 1
Views: 23

Re: Bronsted v Lewis acids and bases

The Lewis definition encompasses the bronsted defintion. Lewis acids can accept an electron pair, while Lewis bases can donate an electron pair where a Bronsted-Lowry acid is defined as a substance that gives up or donates hydrogen ions
by 605208780
Tue Dec 03, 2019 12:04 pm
Forum: Lewis Acids & Bases
Topic: Definition
Replies: 7
Views: 60

Re: Definition

A Lewis acid is an electron-pair acceptor. A Lewis base is an electron-pair donor.
by 605208780
Tue Dec 03, 2019 12:03 pm
Forum: Lewis Acids & Bases
Topic: Oxoacids
Replies: 6
Views: 47

Re: Oxoacids

An oxyacid is an acid that contains an oxygen atom bonded to a hydrogen atom and at least one other element
by 605208780
Tue Dec 03, 2019 12:02 pm
Forum: Industrial Examples
Topic: Bond rotations
Replies: 2
Views: 44

Re: Bond rotations

When one or more lewis diagram can be drawn, the molecule is said to have resonance. Resonance isn't about the rotation of bonds, but about the delocalization of electrons that contribute to the overall structure. The idea that resonances rotate isn't really valid.
by 605208780
Tue Dec 03, 2019 11:59 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentates
Replies: 9
Views: 103

Re: Polydentates

You know that a ligand is a polydentate if it can bond to a central metal atom in more than one coordinate bonding cites.
by 605208780
Tue Dec 03, 2019 11:36 am
Forum: Naming
Topic: Naming Coordination Compounds
Replies: 5
Views: 38

Re: Naming Coordination Compounds

No! You do not need to memorize them, but I would be familiarize yourself with when we use them!
by 605208780
Tue Dec 03, 2019 11:35 am
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Which is the stronger acid?
Replies: 3
Views: 53

Re: Which is the stronger acid?

In both molecules the oxygens are bonded to the chlorine but not to the hydrogen and thus draw the electrons in the O—H bond towards the chlorine and the oxygen, making the O—H bond more polar. This effects chloric acid more than chlorous acid, since the hydrogen will more readily dissociate in a mo...
by 605208780
Tue Dec 03, 2019 11:27 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Chelating Complex
Replies: 3
Views: 40

Re: Chelating Complex

Chelation is a type of bonding of ions and molecules to metal ions so look for a central metal atom
by 605208780
Tue Dec 03, 2019 11:20 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Periodic Trends
Replies: 8
Views: 87

Re: Periodic Trends

Polarizability increases down a group because atomic size increases and larger electron clouds distort more easily. Polarizability decreases across a period because of increasing nuclear charge
by 605208780
Wed Nov 27, 2019 11:59 pm
Forum: Student Social/Study Group
Topic: HW Week 9 & 10
Replies: 4
Views: 57

Re: HW Week 9 & 10

I think week 9 should be on Coordination Compounds and their Biological Importance and week 10 should be on Acid and Base Structures and Properties.
by 605208780
Sun Nov 24, 2019 6:27 pm
Forum: Ionic & Covalent Bonds
Topic: Hydrogen Bond Sites
Replies: 5
Views: 80

Re: Hydrogen Bond Sites

Any bond with a Hydrogen and a N, O, or F
by 605208780
Sun Nov 17, 2019 10:23 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR shapes
Replies: 3
Views: 23

VSEPR shapes

Are the VSEPR shapes that we need to know linear, trigonal planar, tetrahedral, trigonal bypyramidal, and octahedral? Are there any others we should know?

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