Search found 29 matches
- Fri Dec 07, 2018 9:23 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Chapter 12.51
- Replies: 1
- Views: 223
Chapter 12.51
This questions asks us to identify the stronger acid, and in part c it lists HBrO2 and HClO2. I thought it was HBrO2 because Br is larger than Cl and therefore has a weaker bond, but the answer key says HClO2 is stronger and I do not understand why. .
- Sun Dec 02, 2018 1:06 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Acid vs base [ENDORSED]
- Replies: 15
- Views: 1500
Re: Acid vs base [ENDORSED]
A Lewis acid accepts electrons and a Lewis base donates electrons. A Bronsted acid donates protons and a Bronsted base accepts protons.
- Sun Dec 02, 2018 1:03 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination Number
- Replies: 10
- Views: 919
Re: Coordination Number
The coordination number is how many atoms/ligand are bonded to the central compound.
- Mon Nov 26, 2018 4:26 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Radicals
- Replies: 4
- Views: 468
Re: Radicals
How will we know if a molecule is going to be a radical?
- Mon Nov 26, 2018 4:25 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Determining Shape
- Replies: 4
- Views: 461
Re: Determining Shape
Arrangement is solely based on the regions of electron density. The shape is only based on the location of the atoms
- Mon Nov 26, 2018 4:23 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Oxidation number
- Replies: 9
- Views: 824
Oxidation number
Can someone explain to me how to find the oxidation number? Thank you!
- Mon Nov 26, 2018 4:21 pm
- Forum: Hybridization
- Topic: Test 3
- Replies: 13
- Views: 1125
Re: Test 3
I believe that the test covers the end of bonding, VSEPR models, and hybridization.
- Mon Nov 26, 2018 4:20 pm
- Forum: Hybridization
- Topic: Just Kind of Confused
- Replies: 13
- Views: 1004
Re: Just Kind of Confused
Yes, order only matter for electron figuration, not hybridization
- Sun Nov 18, 2018 10:30 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Dipole-Dipole forces
- Replies: 4
- Views: 480
Re: Dipole-Dipole forces
However, the the bonds are polar, and the either the atoms are arranged symmetrically or in another way that the dipole forces cancel out, then the molecule is considered nonpolar.
- Sun Nov 18, 2018 10:28 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Test 3
- Replies: 19
- Views: 1336
Re: Test 3
You should memorize them! We will need to know them by memory for the test, as the VSEPR models are not inc.uded on the constants and equations sheet.
- Sun Nov 18, 2018 10:27 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Hydrogen Bonding
- Replies: 7
- Views: 687
Re: Hydrogen Bonding
I don't think that attractive energy determines the structure of the entire molecule. Attractive energy refers to the strength of the bond. Hydrogen bonds are stronger than Van der Waals but weaker than covalent.
- Thu Nov 08, 2018 10:06 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: HW for discussion
- Replies: 9
- Views: 1030
Re: HW for discussion
I think anything from bonding.
- Thu Nov 08, 2018 10:05 am
- Forum: Ionic & Covalent Bonds
- Topic: Periodic Trends
- Replies: 3
- Views: 382
Periodic Trends
I know that for Ionization energy, electronegativity, and electron affinity the trend is that it increases towards the upper right corner (He). However, how would you determine which atom is more electronegative if there are diagonal (like Na and Ca)
- Thu Nov 08, 2018 10:01 am
- Forum: Ionic & Covalent Bonds
- Topic: Covalent or ionic?
- Replies: 4
- Views: 4079
Re: Covalent or ionic?
The difference in electronegativity is what determines an ionic bond. Professor Lavelle said that the difference in electronegativity would approximately be 2 in order for it to be an ionic bond. Any less would be a covalent bond.
- Wed Oct 31, 2018 1:20 pm
- Forum: Student Social/Study Group
- Topic: Midterm Review Sessions
- Replies: 4
- Views: 600
Re: Midterm Review Sessions
The second review discussion talked about quantum numbers and periodic trends. It was pretty much similar to what we already learned in class.
- Wed Oct 31, 2018 1:17 pm
- Forum: Lewis Structures
- Topic: Octet exceptions
- Replies: 2
- Views: 354
Octet exceptions
I know that certain elements can have more than an octet, but in which form are they more stable.
- Wed Oct 31, 2018 1:15 pm
- Forum: Lewis Structures
- Topic: D orbital
- Replies: 4
- Views: 409
Re: D orbital
The d orbital can hold 10 electrons because it has 5 orbitals
- Wed Oct 24, 2018 6:49 pm
- Forum: Properties of Light
- Topic: Quantum Test
- Replies: 11
- Views: 1231
Re: Quantum Test
If you get confused, I find that reading through the chapter in the book helps, as well as watching outside videos. However, if you keep practicing the problems, it will become fairly easy which formulas to use.
- Wed Oct 24, 2018 6:45 pm
- Forum: Properties of Electrons
- Topic: Degeneracy
- Replies: 11
- Views: 1223
Re: Degeneracy
Degenrate simply means same energy. With Hydrogen, all orbitals of the shell have the same energy, even if the orbital angular momentum value is different.
- Tue Oct 16, 2018 5:58 pm
- Forum: DeBroglie Equation
- Topic: Mass of electrons
- Replies: 3
- Views: 330
Mass of electrons
For some of the homework problems (1.37 in the 6th edition), it implied that we should already know the mass of an electron, proton, and/or neutron. Is this something I should memorize or will it be given to us?
- Tue Oct 16, 2018 5:47 pm
- Forum: DeBroglie Equation
- Topic: Angstrom?
- Replies: 8
- Views: 1527
Re: Angstrom?
An Angstrom is the diameter of 1 Hydrogen atom, or 10^-10. We use this, because SI units go by 3s.
- Tue Oct 16, 2018 5:46 pm
- Forum: DeBroglie Equation
- Topic: DeBroglie Equation
- Replies: 5
- Views: 503
Re: DeBroglie Equation
Also, in the types of problems that do not specifically as for the DeBroglie Equation, how do you know to use it?
- Tue Oct 16, 2018 5:43 pm
- Forum: Properties of Electrons
- Topic: Electron Question
- Replies: 6
- Views: 581
Re: Electron Question
Since electron energies are quantized (they can only be certain numbers, and not continuous), then their energy levels reflect that
- Tue Oct 09, 2018 7:57 pm
- Forum: SI Units, Unit Conversions
- Topic: Quiz 1- Addition to what we should know?
- Replies: 5
- Views: 587
Re: Quiz 1- Addition to what we should know?
For the first test, will we need to be able to identify molecular formulas from their written name? For example in problem F3.) “Write the formula for nitric acid”
- Tue Oct 09, 2018 7:52 pm
- Forum: Balancing Chemical Reactions
- Topic: Test 1
- Replies: 6
- Views: 2766
Test 1
For the test, do we need to show each step of the problem? Are points given from showing work?
- Tue Oct 09, 2018 7:49 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Homework problem G5
- Replies: 2
- Views: 618
Homework problem G5
In the homework problem G5 says “a student prepared a solution on sodium carbonate by adding 2.11 g of a solid to a 250 mL volumetric flask and adding water to the mark. Some of the solution was transferred to a buret. What Volume of the solution should the student transfer into a flask to obtain (a...
- Fri Oct 05, 2018 7:06 am
- Forum: Limiting Reactant Calculations
- Topic: multiple limiting reactants
- Replies: 9
- Views: 846
Re: multiple limiting reactants
It is highly unlikely there will be two limiting reactants
- Fri Oct 05, 2018 7:04 am
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 384693
Re: Advice from a Medical Student [ENDORSED]
Thank you this was so helpful!!
- Mon Oct 01, 2018 4:19 pm
- Forum: Limiting Reactant Calculations
- Topic: Limiting Reactants Post- Module
- Replies: 2
- Views: 226
Limiting Reactants Post- Module
Hello! I was working on the limiting reactants post-module assessment and I got confused about this problem: 20. How many moles of CO2(g) are produced when 1 kg of CaCO3(s) is used to neutralize an acid spill? The equation for the reaction at 1 atm and 25 degrees C is: CaCO3(s) + H2SO4(aq) ---> CaSO...