# All Questions

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22 views

### Hybridization of terminal O atoms in ozone [duplicate]

Most searches about the question of hybridization of O atoms in ozone only deal with the middle O atom, which is sp2. The outer ones are either sp2 or sp3 hybridized depending on which individual ...
33 views

### Nano coatings reaction with Al bottles

I have a question regarding nano coatings based on the formula "modified $\ce{SiO2}$". I have been told that $\ce{Al}$ bottles react with substances with a $\mathrm{pH}$ value below 3 or above 9. ...
50 views

### What is the “mechanism” of the decomposition of hydrogen peroxide?

In my classwork on the decomposition reaction of hydrogen peroxide by catalase, I wrote the following equation: $$\ce{2H2O2 -> 2H2O + O2}$$ However, my teacher said that I should go further in ...
48 views

### Do ions in a salt bridge come from the half cells in electrochemistry?

I understand the basics of electrochemsitry and galvanic cell, where there are half cells where either an oxidation or reduction reaction occur, and electrons moving between the wires provide the ...
30 views

### DIY chemistry - Calcium from bone [closed]

I've gotten really into this subject lately from people who make their own cleaning agents and I was surprised how simplistic (although time consuming) everything was. I am interested in making ...
33 views

### Are there any theorems about packing of atoms in molecules subject to the Lennard-Jones potential?

Related to the problem of minimization of the Lennard-Jones potential in a molecule with $n$ atoms, where $n$ is, say, between $5$ and $10$, questions arise such as (but not limited to) the following: ...
45 views

### Why fibres are strong only in one direction? [closed]

Why fibres are strong only in the direction they are oriented?Why they break if we pull at right angle to their orientation? Here each blue line represents combination of polymeric chains.
36 views

### membrane for a reverse osmosis desalination experiment

We are second year cram schoolers , we are currently working on a project tackling water desalination by reverse osmosis and are required to do an experience. During the process, we encountered some ...
21 views

### Are Hansen solubility parameters available for technical metals and alloys?

Are Hansen solubility parameters available for technical metals and alloys (e.g. aluminium, cast iron, different steels)? Hansen solubility parameters are available not only for solvents and polymers ...
73 views

### Estimation of ground state energy from wave function [closed]

Given the wave functions of a particle in a 1D box below determine (for each pair) if the left or right function gives a better estimation of the ground state energy if the variational method is used. ...
24 views

### Are Hansen solubility parameters available for inorganic salts or ionic molecules?

Are Hansen solubility parameters available for inorganic salts or ionic molecules (e.g. potassium oleate, potassium stearate, sodium dioctyl sulfosuccinate (AOT), sodium dodecyl benzol sulfonate (SDBS)...
62 views

### Reaction of octahydroazecine with iodine crystals [closed]

I really don’t understand why the following reaction would take place first of all. So this is a sub part of a question wherein we have to compare the basicity of the compounds formed through some ...
72 views

### Is there a phase diagram available for hydrogen fluoride?

Has a phase diagram for hydrogen fluoride been published in an article on the internet or in a book ? Or is there a table for HF for different pressures up to 100 atm. and temperatures up to 500$⁰$ C ...
75 views

### What is the color of a FeS4O6 solution [closed]

What is the colour of FeS4O6 solution?!
129 views

44 views

### How to determine the expression of polytropic specific heat and the rule of polytropic transformation? (Thermodynamics)

This is how i manage to solve this question, any feedback is welcome. Also, if you feel that this is not easy understandable, feel free to add comments. I will drop a link to this file in my drive. ...
43 views

### How to test for methane gas purity?

I use methane gas for cooking and there are times in which, despite burners being clean, the flame doesn't burn that well and/or is quite red. I suspect that said gas actually has some air added in, ...