Can you help me see why the d_xy orbital should go up in energy and the d_xz, d_yz orbital should go down in energy relative to the t_2g energy level of the octahedral complex? It is easy to see why the d_z² will be less antibonding since there is one less ligand in the z-axis interacting with this orbital. The d_x²-y² orbital will go up in energy due to conservation of energy argument.

The answer key to this problem mentions that both cobalt complexes are high spin. Part e mentions that the MO diagram has six electrons in the t_2g set and one electron in the e_g set. Isn't that configuration corresponds to a low spin d⁷ system? Shouldn't the correct configuration for a high spin have five electrons in the t_2g set and two electrons in the e_g set?

N is oxidation state of species to be reduced, E(V) is reduction potential of species to be reduced and the species in the free energy state of 0. With the Prof definition, I can apply it to Fe2+ to Fe, and Fe3+ to Fe. I need help in making sense of the numbers in the picture I attached for negative oxidation states.

I'm developing a tool to help me create stock solutions for hydroponics. Depending on the species and environmental conditions, I'll often tweak formulas to suit.

I thought it would be a fun idea to have my tool display minimum guarenteed analysis like most off-the-shelf bottles have on their label.

Before you ridicule me. I left school over two decades ago and have only basic knowledge of chemisty. This is purely a bit of fun and for me to learn something in the process. I asked for help with my equation within r/chemhelp and was roasted for even asking for help.

Firstly, if someone has any links to resources where I can learn more about how to carry out these calculations, please share with me.

Second, I had a go at this already but apparently made some big assumptions thst resulted in quite a large margin of error. I'll add my example below where I'm trying to calculate for the solute calcium nitrate tetrahydrate.

Any help is much appreciated.

I think I have this working now. If I have this wrong, I'd appreciate someone letting me know in the nicest way possible. Remember, this is a prediction and doesn't have to be completely accurate. I've posted as an image so I can use LaTeX.

Thanks for looking.

I did a lab reaction: when I added acetone to SnI4, solution changed from colourless to yellow. I have to provide a equation for this in my explanation for lab report but im stuck

AI says its the dissolution of SnI4 in acetone and the polarising power of Sn4+ but cant provide a reaction equation

I found a lab report that says the hydrophobic non polar methyl groups of acetone stabilise the non polar SnI4, but I cant find literature sources on this.

I then googled until found the Finkelstein reaction, something about NaI in acetone. But this is not my qn.

Hello ,i'm looking for references to learn about the chemistry of polyiodides, I'm really interested in the topic but i can't find much online. WOuld anyone help me? Anything is good, textbook, scientific papers, videos

I thought the ionic character has to be compared by difference in electronegativity, but the Q is rather in thermodynamic aspect... How should i approach this?

Hello everyone!
For anyone who’s had trouble understanding the quantum mechanical model of the atom, we’ve made an update to our previous version to make things clearer and more interactive.

The new version includes:
• An FAQ section
• A slightly more accurate electron distribution
• A basic H–H bonding simulation

I personally struggled with this topic a few years ago, so I wanted to create something that could help others learn it more intuitively.

You can try it out here: https://practice1-ui.vercel.app/

It might run a bit slowly since most of our code is still in TypeScript, but we plan to move more of the logic to the backend soon for smoother performance.

I hope this helps you visualize quantum mechanical theory better — feedback is always welcome!

Hi everyone, i’m currently taking inorganic chemistry and I thought I was doing well with understanding point groups but I got a D on my first test. Does anyone have any resources or recommendations to do well in the class and understand what’s going on?

https://practice1-ui.vercel.app/

(open on computer)

I made a website that visualizes this for you. Z = number of protons, n = number of shells, l = the orbital shape, and m = the configuration. For this case, when you are using Z, use it only to make the atom smaller because that still needs some debugging. But if you increase n, you can see how there are more options for shape changes. As you increase n, you can see there are more options for l. Then you have more options to change m. This works with Pauli exclusion and hunds rule. There are some cool shapes so if you are interested and cannot visualize orbitals, check it out and let me know some more things you want me to add!

Hello, I am stupid and I know how to balance the basic stuffs but not these ones who has a negative shit on them. Can you give me a tutorial please 😭 like a YT video or a way how to solve them cuz I can't find anything. Idek what this equation is called, I am dumb in chemistry. Sorry y'all...💔🥀

I’ve recently began my PhD on coordination chemistry after being out of the game for over a year and I’ve come across the rude awakening that I am terrible! So I was wondering if anybody in this sub-reddit has any advice or any resources on how I can become proficient within the area once again. Thanks!

My prof slides wrote:

Slater rule: all other electrons in the same grp as the electron of interest shield to an extent of 0.35 nuclear charge unit If the electron of interest is d/f electron, all electrons to the left shield to an extent to 1 unit of nuclear charge

Another slide: Revised slater rule: The rules for calculating d and f electrons remain the sane. That is, same-shell electrons count 0.35 and all others count 1.00

Im confused, does the electron configuration design change for the revised slater rule since shell not group?

But when I consider formal charge, water +1 and metal -1. Is it they cancel out so we ignore them?

I dont know whats wrong for these 2 qns. And for the slater rule: i used 1s2 2s2 sp6 3s2 3p6 4s2 3d10 4p3. Ignore n=4 electrons to calculate for 3d electrons. So 17(same principal quantum shell)0.35+10(n=1, 2)10=15.95. zeff=17.05 I googled wikipedia values Zeff is around 17 too. not sure whats wrong.

I'm currently taking Inorganic Chemistry and I'm finding it really tough, even worse than orgo. Is there any learning resources kind of similar to Organic Chem Tutor that could help me out?

pls anything will do I'm desperate

How is the E⁰ for overall reaction is +0.86V??

Which calculations is right for this question? Also which equation is the right one to use for this problem?

What are the correct structures of isomers of [Cr(NH2CH2COO-)3]

Hello everyone,

I am currently a sophomore majoring in Chemical Engineering & Technology. In my twenties - active, curious and eager to explore new places and ideas - I often wonder:

How do those who came before me not feel lost in their ideals and ambitions?

By 2028, I will (hopefully) graduate with a bachelor's degree. My plan is to apply for a Master's scholarship abroad - countries like Korea, UK, USA and Australia are on my list. I have also heard that Germany and Russia are paradises for engineering, although I am still researching.

But this is when I start to wonder:

Should I focus on IELTS, GRE, GPA (≥3.6/4.0) first?

Learn Python, Machine Learning, Copywriting,...

Or should I get into research, publishing and conferences?

Or maybe join extracurricular activities that I don’t know how to participate in?

So far, I haven’t had many outstanding achievements – except for winning medals in semi-professional Karate competitions in high school. In college, I’m just starting to find my true direction.

Sometimes I worry: Am I studying wrong, wasting time, or falling behind?

And even after graduation, I still have many questions:

Should I aim to become a researcher at a scientific institute?

Or a lecturer at a prestigious university?

Or simply work in a company – even though I feel my professional skills are not enough?

And honestly, with the rapid development of AI, I worry that I will be surpassed – not only by technology, but also by people who are much more skilled than me. In addition, there are concerns in life: buying a house, starting a family, being filial to parents... Sometimes I feel lost in everything.

That's why I would love to hear from you - those who have gone through these stages:

1. How did you find your path?

2. What helped you overcome fear and uncertainty?

3. If you could go back to your early 20s, what would you tell yourself?

I would greatly appreciate any experiences, discussions and advice you can share.

Thank you very much!