Search found 32 matches

by MaiaRodriguezChoi3E
Wed Dec 05, 2018 10:39 am
Forum: Lewis Acids & Bases
Topic: Problem 12.15 6th Edition
Replies: 2
Views: 66

Re: Problem 12.15 6th Edition

You're only using 16 valence electrons if both oxygens have a double bond and you want to be using 18.
by MaiaRodriguezChoi3E
Sun Dec 02, 2018 8:26 pm
Forum: Naming
Topic: 7.29 6th edition Cobalt vs Colbaltate
Replies: 1
Views: 39

7.29 6th edition Cobalt vs Colbaltate

So for this question it was asking for the names of different coordination compounds, several of which had cobalt as the metal to which the ligands are bound. The compounds were b) [Co(NH3)6] 3+, c)[Co(CN)5(OH2)]2-, and d) [Co(SO4)(NH3)5]+. For b and d, cobalt was just called cobalt in the full name...
by MaiaRodriguezChoi3E
Sun Dec 02, 2018 3:34 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Tetrahedral vs square planar
Replies: 1
Views: 58

Tetrahedral vs square planar

How can you tell if a coordination compound will form a tetrahedral complex vs a square planar one?
by MaiaRodriguezChoi3E
Sun Dec 02, 2018 11:59 am
Forum: Administrative Questions and Class Announcements
Topic: More practice
Replies: 7
Views: 271

More practice

Does anyone have any resources for more practice problems, other than the HW and worksheets on Chemistry Community? Thanks!
by MaiaRodriguezChoi3E
Sun Dec 02, 2018 11:56 am
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Acid vs base [ENDORSED]
Replies: 15
Views: 330

Re: Acid vs base [ENDORSED]

How do these definitions differ from the Bronsted definitions?
by MaiaRodriguezChoi3E
Sun Dec 02, 2018 11:56 am
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Acid vs base [ENDORSED]
Replies: 15
Views: 330

Re: Acid vs base [ENDORSED]

A lewis acid is an electron accepter while a base is an electron donor.
by MaiaRodriguezChoi3E
Sun Dec 02, 2018 11:54 am
Forum: Lewis Acids & Bases
Topic: Bronsted vs. Lewis
Replies: 3
Views: 81

Re: Bronsted vs. Lewis

I'm also confused about this. What is the definition of a Lewis acid/base and Bronsted acid/base? What is the significance of the difference between these terms?
by MaiaRodriguezChoi3E
Thu Nov 29, 2018 7:33 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxidation numbers
Replies: 1
Views: 60

Oxidation numbers

Could someone explain how to find the oxidation number for [Fe(CN)6]^4-?
by MaiaRodriguezChoi3E
Mon Nov 26, 2018 7:46 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: HW 6th edition 4.25a
Replies: 1
Views: 54

HW 6th edition 4.25a

So the question is asking for the lewis structure of CH2Cl2 and whether it is polar or nonpolar. I'm confused because if you draw the lewis structure with the Cl's across from each other, then the molecule is nonpolar whereas when you draw the lewis structure with the Cl's next to each other the str...
by MaiaRodriguezChoi3E
Sun Nov 18, 2018 10:17 pm
Forum: Sigma & Pi Bonds
Topic: Visualizing sigma and pi bonds
Replies: 7
Views: 158

Re: Visualizing sigma and pi bonds

Thank you everyone for all the resources!!!
by MaiaRodriguezChoi3E
Sun Nov 18, 2018 9:27 pm
Forum: Sigma & Pi Bonds
Topic: Visualizing sigma and pi bonds
Replies: 7
Views: 158

Visualizing sigma and pi bonds

Does anyone have any resources for how to visualize sigma and pi bonds?
by MaiaRodriguezChoi3E
Sun Nov 18, 2018 9:25 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: T Shaped
Replies: 3
Views: 90

T Shaped

I'm confused about how a T shaped molecule works? Could someone explain how the lone pairs affect the structure?
by MaiaRodriguezChoi3E
Sun Nov 18, 2018 1:32 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Angular vs Bent
Replies: 4
Views: 106

Angular vs Bent

Are angular and bent the same molecular shape?
by MaiaRodriguezChoi3E
Sun Nov 18, 2018 12:24 pm
Forum: General Science Questions
Topic: Audio Visuals
Replies: 6
Views: 357

Re: Audio Visuals

Does anyone know of any resources similar to the audio visuals for the other topics this quarter? Do people find Khan academy helpful, or crash course videos?
by MaiaRodriguezChoi3E
Sat Nov 17, 2018 4:01 pm
Forum: General Science Questions
Topic: Exciting Chemistry News!
Replies: 2
Views: 158

Exciting Chemistry News!

I wanted to share a news article I found that was chemistry related and that I found very interesting! It's about a recent change to how a kilogram is defined.

https://www.usatoday.com/story/news/201 ... 023420002/
by MaiaRodriguezChoi3E
Wed Nov 14, 2018 11:03 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Multiple bonds
Replies: 2
Views: 53

Multiple bonds

When determining the molecular shape and electron arrangement, should you just treat single and multiple bonds the same? Because that's what I thought the textbook said, but it seemed like my TA was saying something different...
by MaiaRodriguezChoi3E
Tue Nov 13, 2018 4:11 pm
Forum: Ionic & Covalent Bonds
Topic: Which way to put greater than/less than signs
Replies: 2
Views: 102

Which way to put greater than/less than signs

Sorry, dumb question: When the textbook says to order something in increasing order, which way do you put the greater than/less than symbols?
by MaiaRodriguezChoi3E
Sat Nov 03, 2018 8:45 pm
Forum: Trends in The Periodic Table
Topic: Exceptions to ionization energy
Replies: 1
Views: 81

Exceptions to ionization energy

In review session today the UA went over some exceptions to ionization energy trends for Carbon and Nitrogen. Could someone explain these exceptions in more detail?
by MaiaRodriguezChoi3E
Sat Nov 03, 2018 8:43 pm
Forum: Lewis Structures
Topic: Cations and Anions
Replies: 3
Views: 65

Cations and Anions

What exactly is the definition of a cation and an anion?
by MaiaRodriguezChoi3E
Sat Nov 03, 2018 8:42 pm
Forum: Lewis Structures
Topic: Radicals?
Replies: 4
Views: 63

Radicals?

Are radicals going to be on the midterm?
by MaiaRodriguezChoi3E
Fri Oct 26, 2018 4:25 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1019930

Re: Post All Chemistry Jokes Here

A photon walks into a hotel. The bellhop says "Can we help you with your luggage?". The photon replies, "No thanks, I'm traveling light"
by MaiaRodriguezChoi3E
Fri Oct 26, 2018 4:21 pm
Forum: Ionic & Covalent Bonds
Topic: Valence Electrons
Replies: 4
Views: 99

Valence Electrons

How do you know how may valence electrons an element or compound has?
by MaiaRodriguezChoi3E
Fri Oct 26, 2018 2:19 pm
Forum: Trends in The Periodic Table
Topic: Electron Affinity
Replies: 8
Views: 147

Re: Electron Affinity

I think that looking at it diagonally from the bottom left to top right is probably the easiest way to look at the trend for electron affinity
by MaiaRodriguezChoi3E
Thu Oct 18, 2018 7:26 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: 1.15 Homework Problem
Replies: 2
Views: 108

Re: 1.15 Homework Problem

If you get a negative energy, should you still plug a positive value into the wavelength equation?
by MaiaRodriguezChoi3E
Thu Oct 18, 2018 7:25 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Equation
Replies: 3
Views: 69

Re: Rydberg Equation

Will we get points off if we use it on the test? Or does it not matter as long as we get the right answer?
by MaiaRodriguezChoi3E
Thu Oct 18, 2018 7:22 pm
Forum: Properties of Electrons
Topic: eV to J
Replies: 7
Views: 164

eV to J

Whats the conversion for eV to J? Should we memorize this conversion factor?
by MaiaRodriguezChoi3E
Thu Oct 11, 2018 8:52 pm
Forum: Properties of Light
Topic: Do I need to memorize the Light Spectrum? [ENDORSED]
Replies: 13
Views: 177

Re: Do I need to memorize the Light Spectrum? [ENDORSED]

I don't think you need to memorize exact values. Just having a general idea and being able to approximate the wavelengths for each major type (UV, infrared, etc...) is sufficient.
by MaiaRodriguezChoi3E
Thu Oct 11, 2018 8:51 pm
Forum: Properties of Light
Topic: HW 1A.9 [ENDORSED]
Replies: 4
Views: 72

Re: HW 1A.9 [ENDORSED]

I think you use E=hc/wavelength which was an equation we derived last lecture from E=hv and c=wavelength x v
by MaiaRodriguezChoi3E
Thu Oct 11, 2018 8:44 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Mass percent composition [ENDORSED]
Replies: 4
Views: 253

Re: Mass percent composition [ENDORSED]

Yes, mass percentage composition is simply the percentage of the mass of a certain element in a compound. So you take the mass of the element divided by the molar mass of the entire compound and times 100%
by MaiaRodriguezChoi3E
Thu Oct 04, 2018 4:13 pm
Forum: SI Units, Unit Conversions
Topic: How does grading for discussion posts work?
Replies: 80
Views: 2583

Re: How does grading for discussion posts work?

Does it matter if we respond to a question that's already been answered or do we just need to make three posts?

Go to advanced search