CHEMISTRY COMMUNITY

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when do we put -ate at the end of naming a ligand?

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divide by Avogadro's # when going from moles -> atoms/molecules
multiply by Avogadro's # when going from atoms/molecules -> moles

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As those above have stated, yes. The stronger the acid(towards 0)/base(towards 14) the greater the impact.

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I believe the textbook problems are up for grabs on the final, so I think it's safe to say that they're good practice!

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The frequency and amplitude are independent of each other. Frequency is the cycles per sec and amplitude is how large the wave is. I think if anything they would be inversely related.

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hi! I believe an increase in intensity increases the number of photons by terms of the photoelectric effect and will emit more electrons but it doesn't effect the energy.

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The uncertainty in velocity is the range since its 5 and the uncertainty is +/-5, You would add 5+5=10 minus 5-5=0. 10-0=10, so your deltaV is 10.

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I think it is because of the concept that they are not independent variables and grants a realistic limit based on the known behavior of an electron and its position.

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There is the ligand chart on Lavelle's website. My TA said we should familiarize ourselves with which are/can be polydentate.
https://lavelle.chem.ucla.edu/wp-conten ... pounds.pdf

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here is the ligand naming chart hope this helps!
https://lavelle.chem.ucla.edu/wp-conten ... pounds.pdf

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Sorry, I misread your question but I think it will be the topics we are covering this week with acids and bases.

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Here's a doc with the sessions

https://docs.google.com/document/d/16jS ... sp=sharing

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Seeing that there is a chance of an adjustment gives me hope, but no curve has been mentioned by Dr. Lavelle.

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tholz11 wrote:If we missed a question on sapling is that factored into the grade? As in, do we lose points off our grade?

yes the percentage of completion is the percent of points you get for that homework grade

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You're the best THANK YOU

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Super helpful thank you for sharing!!

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hi! both are correct and as the response above says, you will see H2O in the textbook more so than OH2.

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I believe when naming coordination compounds the metal tends to be last

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As those above me have said, -ate is used when naming a compound with an overall negative charge

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I'm relieved with everyone's encouragement especially with my grades on the midterm 2 and finding the 50 is a pass. thank you for the bruno mars song!! needed her! ;(

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Going back through chem community to find this GOLD thank you!! super helpful!

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Hi! I believe Cobalt's charge is 3+ instead of 2+ and spelling errors got me, so be sure you're spelling it right when submitting. Hope this helps!

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Hi! I believe the second image was a typo of sorts or is written with different rules than we have been taught, so I think it's safe to structure it in the same way the lectures instruct. Hope this helps!

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I have yet to start the homework, but just by looking at your answer I worked backwards to get the formula. [Co(NH3)5Cl]Cl. The Cl inside and outside both have a -1 charge, and ammine has no charge. Adding the two -1 charges from the chlorine ions would make a -2 total charge, but since everything ...

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Hi! the oxidation state is also called the oxidation number and is the total number of electrons that an atom gains or loses to form a chemical bond. Hope this helps!

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Hi! I think they are often given to us, but the link in the response is definitely a helpful resource while familiarizing with them.

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I believe the seesaw shape has a lone pair, where coordination compounds do not have lone pairs making seesaw less common for 4 ligand structure

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Juwon Lim 3N wrote:A hexagonal planar does have a coordination number of 6. However, the question asks for the geometries that are common for compounds that have a coordination number of 6. Hexagonal planar is very very rare, while octahedrals are much more common.

that makes sense thank you!

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Since the cyanide ion CN has a -1 charge, the (CN)2 would have a -2 charge and Ag can only carry a unipositive charge (+1) making the compound have a -1 charge inside the brackets. Continuing with the Na (+1), that makes the compound without an exterior charge. So, to find those charges, we use the ...

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Like the other responses said, the coordination number is the number of bonds to the central transition metal and this number can be found inside the brackets. In this case, there are 4 Br bonded to the transition metal, so the coordination number is 4.

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Hi,

Can someone explain how hexagonal planar does not have a coordination number of 6?

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Lewis bases tend to have lone pairs and can "donate" to compounds that are Lewis acids or "accepters" of electrons.

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I believe we've learned the trends of electronegativity of elements on the periodic table. (those closer to reaching octet by gaining electrons on the right vs those on the left)

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Here are the things we've learned so far: Left to right of the periodic table: - ionization energy increases - electronegativity increases -electron affinity increases -atomic radius decreases Top to bottom: - atomic radius increases Bottom left: - more bottom left, the more metallic it is Top righ...

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Since H bonds happen between Hydrogen and F, O, or N, we use the context of the problem to concur O must be on either side of the H.

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Hydrogen bonding is possible in water when hydrogen is bonded with Nitrogen, Oxygen, Fluorine.

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Best via formal charge is the one with formal charge closest to 0. And concerning bond length in regards to the sample question, average the lengths of those given in the question and the one closest to the overall length is your best choice.

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Is the radius of the element larger or smaller when it has a positive or negative ion?

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how do I change the number of electrons concerning the orbital being ml=-1?

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can a wavelength be negative?

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When solving for wavelength of emitted electromagnetic radiation, does the initial n level go as n1 or n2 in the equation "R*(1/n^2"1"-1/n^2"2")?

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SophiaJenny1J wrote:Hi! On this general note, do the five posts per week get tallied up on Sunday nights or Friday nights of each week? Thanks!

Sunday nights

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How do I register or join a step up session online?

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When submitting an answer online on sapling, what is the format for sig figs? Do I need to change it to have "x 10^_"?

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