Search found 32 matches
- Sat Dec 08, 2018 11:21 pm
- Forum: Conjugate Acids & Bases
- Topic: Acceptor and Donor?
- Replies: 3
- Views: 591
Re: Acceptor and Donor?
Conjugate acids and bases should be seen as what is left over after an acid and base reaction, not what that they donate or receive protons.
- Sat Dec 08, 2018 11:17 pm
- Forum: Identifying Acidic & Basic Salts
- Topic: Neutralization
- Replies: 3
- Views: 532
Re: Neutralization
The salt may be an acid that will react with water and produce more hydronium atoms to make a more acidic solution
- Sat Dec 08, 2018 11:16 pm
- Forum: Properties of Light
- Topic: Colors and Frequency
- Replies: 14
- Views: 1684
Re: Colors and Frequency
We just need to know the general wavelengths that are associated with types of waves.
- Sat Dec 08, 2018 11:15 pm
- Forum: Properties of Light
- Topic: Speed of Light
- Replies: 41
- Views: 2899
Re: Speed of Light
Speed of light is constant
- Sat Dec 08, 2018 11:14 pm
- Forum: Student Social/Study Group
- Topic: Final
- Replies: 12
- Views: 1737
Re: Final
More focus may be towards the last part of this chapter since we haven't been tested on it yet.
- Sat Dec 08, 2018 11:13 pm
- Forum: Sigma & Pi Bonds
- Topic: Why are sigma bonds stronger than pi bonds?
- Replies: 10
- Views: 4725
Re: Why are sigma bonds stronger than pi bonds?
sigma bonds have more overlap and the pi bonds only make contact side by side
- Sat Dec 08, 2018 11:13 pm
- Forum: Naming
- Topic: cis and trans
- Replies: 4
- Views: 532
Re: cis and trans
cis means same side and trans means opposite sides
- Sat Dec 08, 2018 11:11 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: HOCl vs HOI
- Replies: 9
- Views: 4268
Re: HOCl vs HOI
Cl bonds have more stability due to higher electronegativity.
- Mon Dec 03, 2018 2:24 am
- Forum: Sigma & Pi Bonds
- Topic: Triple bond?
- Replies: 18
- Views: 1787
Re: Triple bond?
There will be one sigma and two pi bonds.
- Mon Dec 03, 2018 2:22 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone Pairs
- Replies: 11
- Views: 968
Re: Lone Pairs
It is because lone pairs are areas of high electron density that have effects of repulsion that alter the shape of a molecule.
- Mon Dec 03, 2018 2:18 am
- Forum: Hybridization
- Topic: Double and Triple Bonds
- Replies: 17
- Views: 4353
Re: Double and Triple Bonds
No the type of bond doesn't matter but the number of areas of high electron density do.
- Mon Nov 26, 2018 1:42 am
- Forum: Lewis Structures
- Topic: Expanded Octet
- Replies: 8
- Views: 924
Re: Expanded Octet
Expanded octet is when an atom can hold more than 8 valence electrons in a lewis structure. So some atoms like sulfur, phosphorous, or chlorine are more prone to expanded octets. This is something you should simply keep in mind.
- Mon Nov 26, 2018 1:39 am
- Forum: Administrative Questions and Class Announcements
- Topic: Test 3
- Replies: 10
- Views: 1193
Re: Test 3
Basically 2d-2f. If you read those three chapters and do the problems you should be prepared.
- Mon Nov 26, 2018 1:38 am
- Forum: Ionic & Covalent Bonds
- Topic: Resonance
- Replies: 3
- Views: 435
Resonance
Is it possible to determine when a molecule will have resonance? Basically I'm wondering how do you know when there will be multiple lewis structures for one molecule.
- Sun Nov 18, 2018 11:46 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3917389
Re: Post All Chemistry Jokes Here
Don't trust atoms, they make up everything
- Sun Nov 18, 2018 11:44 pm
- Forum: Ionic & Covalent Bonds
- Topic: Intra vs Intermolecular forces
- Replies: 9
- Views: 16781
Re: Intra vs Intermolecular forces
Intramolecular forces are way harder to break because entire bonds have to be broken. Intermolecular forces are just breaking weak dipole moments.
- Sun Nov 18, 2018 11:42 pm
- Forum: Hybridization
- Topic: Bond Angles
- Replies: 12
- Views: 1173
Re: Bond Angles
Drawing Lewis structures is very helpful, because it helps you avoid making careless mistakes.
- Sun Nov 11, 2018 9:39 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Class Grading
- Replies: 9
- Views: 1169
Re: Class Grading
On the syllabus it says the class takes the average of the total points out of 500 that students get in the class. Then it gives grades to students accordingly.
- Sun Nov 11, 2018 9:33 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 11
- Views: 1347
Re: Formal Charge
That is not possible because formal charge is based off the specific composition of a molecule. An atom doesn't own or have a specific formal charge.
- Sun Nov 11, 2018 9:32 pm
- Forum: Electronegativity
- Topic: Electron Affinity
- Replies: 3
- Views: 918
Re: Electron Affinity
Yes, since the K ion has a full valence shell it will require or release much more energy when an electron is added or taken away.
- Sun Oct 28, 2018 11:42 pm
- Forum: Ionic & Covalent Bonds
- Topic: ionization energy
- Replies: 3
- Views: 450
Re: ionization energy
The reason is because atoms with high ionization levels aren't as likely to give up electrons to make the atom a positively charged cation. Additionally, with more energy required to remove electrons these atoms aren't as compatible with the fluid electron flow of conducting electrical currents.
- Sun Oct 28, 2018 11:40 pm
- Forum: Lewis Structures
- Topic: Lewis Structures
- Replies: 13
- Views: 1043
Re: Lewis Structures
Basically the atom with the lowest ionization energy since these atoms are the most likely to give up or share their electrons.
- Sun Oct 28, 2018 11:37 pm
- Forum: Ionic & Covalent Bonds
- Topic: Octet Rule
- Replies: 7
- Views: 685
Re: Octet Rule
Yes there are a few exceptions to the octet rule. For example, molecules like NO have an odd number of electrons and in molecules like BCl3 not all the atoms possess 8 electrons.
- Sun Oct 21, 2018 11:59 pm
- Forum: Trends in The Periodic Table
- Topic: Periodic Table Trends
- Replies: 5
- Views: 645
Re: Periodic Table Trends
Atomic radius gets bigger and farther down to the left. Ionic Radius gets bigger farther down to the left, but there isn't a strong correlation. Electron affinity gets stronger to the left and ionization energy gets larger to the right.
- Sun Oct 21, 2018 11:49 pm
- Forum: Trends in The Periodic Table
- Topic: Electron Affinity
- Replies: 2
- Views: 1726
Re: Electron Affinity
It is the ability to attract more electrons
- Sun Oct 21, 2018 11:21 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Energy levels of orbitals?
- Replies: 10
- Views: 781
Re: Energy levels of orbitals?
S<P<D<F because the farther the distance of the orbital from the nucleus the higher the energy that is required to keep the orbital from resisting the inward pull. As a result, the farthest orbital requires the greatest amount of energy
- Sun Oct 14, 2018 3:43 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Grades??
- Replies: 4
- Views: 301
Re: Grades??
Everything is handed back in discussion and I think they might be posted online at some point.
- Sun Oct 14, 2018 3:42 pm
- Forum: Properties of Light
- Topic: Speed of Light
- Replies: 41
- Views: 2899
Re: Speed of Light
For the purposes of this class the speed of light probably will always stay the same. Though I think in certain mediums like water or glass the light of speed can change.
- Sun Oct 14, 2018 3:39 pm
- Forum: Properties of Light
- Topic: Colors and Frequency
- Replies: 14
- Views: 1684
Re: Colors and Frequency
Ya just knowing the general wavelength range for certain electromagnetic radiation like visible light or x-rays should be enough.
- Fri Oct 05, 2018 11:28 am
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: atoms vs molecules vs formula units?
- Replies: 3
- Views: 309
Re: atoms vs molecules vs formula units?
Yes there is nothing different in calculating an atom, molecule, or formula unit. It just has different meanings and units that need to be marked in your final answer.
- Fri Oct 05, 2018 11:22 am
- Forum: Limiting Reactant Calculations
- Topic: When to use H vs H2
- Replies: 7
- Views: 1112
Re: When to use H vs H2
I remember in high school that there were some elements that always had to be in pairs. The reasoning was that hydrogen would be unstable as a singular atom in itself. So I guess it is necessary to have to do an extra step of multiplying molar mass by 2.
- Fri Oct 05, 2018 11:19 am
- Forum: Significant Figures
- Topic: Significant Figures for E.21 (b)
- Replies: 4
- Views: 463
Re: Significant Figures for E.21 (b)
Ya I was in the same boat. I spent some time trying to figure out why the book had only 3 sig figs. But clearly the answer needs to have 4.