CHEMISTRY COMMUNITY

MaiaRodriguezChoi3E

You're only using 16 valence electrons if both oxygens have a double bond and you want to be using 18.

MaiaRodriguezChoi3E

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...

MaiaRodriguezChoi3E

How can you tell if a coordination compound will form a tetrahedral complex vs a square planar one?

MaiaRodriguezChoi3E

Does anyone have any resources for more practice problems, other than the HW and worksheets on Chemistry Community? Thanks!

MaiaRodriguezChoi3E

How do these definitions differ from the Bronsted definitions?

MaiaRodriguezChoi3E

A lewis acid is an electron accepter while a base is an electron donor.

MaiaRodriguezChoi3E

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?

MaiaRodriguezChoi3E

Could someone explain how to find the oxidation number for [Fe(CN)6]^4-?

MaiaRodriguezChoi3E

Why does the increasing size or molar mass of a molecule result in stronger attractive interactions?

MaiaRodriguezChoi3E

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...

MaiaRodriguezChoi3E

Why does water's structure/polarity make it a good solvent?

MaiaRodriguezChoi3E

Thank you everyone for all the resources!!!

MaiaRodriguezChoi3E

Does anyone have any resources for how to visualize sigma and pi bonds?

MaiaRodriguezChoi3E

I'm confused about how a T shaped molecule works? Could someone explain how the lone pairs affect the structure?

MaiaRodriguezChoi3E

Are angular and bent the same molecular shape?

MaiaRodriguezChoi3E

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?

MaiaRodriguezChoi3E

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/

MaiaRodriguezChoi3E

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...

MaiaRodriguezChoi3E

Sorry, dumb question: When the textbook says to order something in increasing order, which way do you put the greater than/less than symbols?

MaiaRodriguezChoi3E

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?

MaiaRodriguezChoi3E

What exactly is the definition of a cation and an anion?

MaiaRodriguezChoi3E

Are radicals going to be on the midterm?

MaiaRodriguezChoi3E

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"

MaiaRodriguezChoi3E

How do you know how may valence electrons an element or compound has?

MaiaRodriguezChoi3E

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

MaiaRodriguezChoi3E

If you get a negative energy, should you still plug a positive value into the wavelength equation?

MaiaRodriguezChoi3E

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?

MaiaRodriguezChoi3E

Whats the conversion for eV to J? Should we memorize this conversion factor?

MaiaRodriguezChoi3E

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.

MaiaRodriguezChoi3E

I think you use E=hc/wavelength which was an equation we derived last lecture from E=hv and c=wavelength x v

MaiaRodriguezChoi3E

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%

MaiaRodriguezChoi3E

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

CHEMISTRY COMMUNITY

Search found 32 matches

Re: Problem 12.15 6th Edition

7.29 6th edition Cobalt vs Colbaltate

Tetrahedral vs square planar

More practice

Re: Acid vs base [ENDORSED]

Re: Acid vs base [ENDORSED]

Re: Bronsted vs. Lewis

Oxidation numbers

Size and Strength of Attractive forces

HW 6th edition 4.25a

Water as a solvent

Re: Visualizing sigma and pi bonds

Visualizing sigma and pi bonds

T Shaped

Angular vs Bent

Re: Audio Visuals

Exciting Chemistry News!

Multiple bonds

Which way to put greater than/less than signs

Exceptions to ionization energy

Cations and Anions

Radicals?

Re: Post All Chemistry Jokes Here

Valence Electrons

Re: Electron Affinity

Re: 1.15 Homework Problem

Re: Rydberg Equation

eV to J

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

Re: HW 1A.9 [ENDORSED]

Re: Mass percent composition [ENDORSED]

Re: How does grading for discussion posts work?