# All Questions

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### Spectrochemical Series

In coordination chemistry, we talk about a spectrochemical series to indicate the strengths of the ligands. Is there any way I can remember this series, maybe based on other trends I'm familiar with, ...
10 views

### Bonding in d10 metals such as Zn

I recently learned about the MO bonding model in metals, where many metal atoms form lots of orbitals close in energy that form bands. However, I can't understand the bonding in d10 metals. It seems ...
6 views

### Relationship of dipole moment with heat

Of the conformers of 1,2-dichloroethane, what will happen to the net dipole moment of the sample when it is heated. My teacher told that when we heat the mixture of conformers of 1,2-dichloroethane, ...
12 views

### Devarda's alloy procedure

Hello dear I have a small question I want to do kjeldahl distillation for a 100 mL sample of water after reduction with devarda's alloy to measure the concentration of nitrate nitrogen... I want to ...
24 views

### Rusting in every other bar

I have noticed that, when a structure with bars (such as a gate or a grate) develops rust, this sometimes happens differently across the bars. In particular, it seems that the bars are alternatively ...
16 views

### Entropy change as temperature changes under isobaric conditions

everybody: I have this question that is definitely a challenge for me and I was looking for some help. I did manage to do part a but I'm not sure if it's correct. Part b is even harder for me. I'm not ...
20 views

### Why does taking reactants in stoichiometric ratio result in maximum amount of products?

I came across this example: For obtaining maximum mass of NO2 from a given mass of a mixture of NH3 and O2, the ratio of mass of NH3 and O2 is taken to be in the ratio of their stoichiometric ...
I would like to test samples of polyethylene glycol 3350 ($\ce{H−(O−CH2−CH2)_n−OH}$ with an average molecular weight of 3350, so n is around 75) to determine if there are any impurities and if so the ...