# All Questions

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### Melting point of crystalline solids

Why crystalline solids have sharp melting points but melting point of amorphous solids vary within a range? Is it cuz the interaction energy is equal btw atoms of crystalline solids so they require ...
4 views

### Crystalline solids

Why crystalline solids are anisotropic whereas amorphous solids are isotonic? Is it because in crystalline solids, x,y and z dimensions vary....but so does in amorphous. Please write as simple as ...
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### Why thermodynamic state variables of a sytem are only defined at thermodynamic equilibrium and not during any other instant?

As you have read the title so my question is why are thermodynamic variables only meaningful when the thermodynamic system is in thermodynamic equilibrium and is always meaningless in any other case.
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### How can I convert Potassium Permanganate into a Mn(ii) salt?

I have Potassium Permanganate crystals and I need to make a pure manganese salt in the 2+ oxidation state of Mn. What is the best method?
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### Alc. KOH and aq. KOH (E2 vs SN2)

So my question is , we know that polar protic solvents tend to decrease the rate of substitution reaction so why does $\ce{aq. KOH}$ favour substitution over elimination whereas $\ce{alc. KOH}$ ...
17 views

### Why is substitution of halogens to alkanes a chain reaction?

During the propagation step 2, the alkyl radical always react with the halogen molecule according to my textbook. However, isn't the alkyl radical react with the halogen radical formed in the ...
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### Is Freundlich isotherm valid for high pressure?

Why Freundlich isotherm fails at wide range of high pressure?
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### Science of soap bubbles

On the web there are tons of different recipes for a solution to make soap bubbles. Most of them use only three ingredients: water dish soap glycerin But their ratios widely change among the sources....
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### How to model the Belousov-Zhabotinsky (BZ) (in Maple)

I need to model the Belousov-Zhabotinsky reaction (or a different oscillating one). I found out about the Oregonator and the Brusselator reaction and now I want to model them in Maple (or similar ...
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### How to add components in visual MINTEQ

I need to figure out speciation of a mixture of metal nitrates and chloroplatinic acid. I am using visual MINTEQ to do this. But platinum ion is not there in the visual MINTEQ component list. I need ...
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### Can sulphuric acid reacting with CoSi2?

Realised sulphuric acid will react with silicon with present of strong alkaline or metallic ion. I am wondering is the same reaction will happen with CoSi2?
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### Law of equivalence

100 gram mixture of two metals a and b is heated to constant weight of 50 gram containing corresponding oxides of the metals. The equation weight of a and b are 103 and 31 respectively .What is the ...
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### Can anyone tell me the reaction of acetamide with Conc.H2SO4? [closed]

Can anyone tell me the reaction of acetamide with Conc.H2SO4 ? With mechanism?
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### What is diamagnetic in diamagnetic dilution?

I'm reading a paper where the authors study a peptide solution where each peptide may have two spin labels attached to them. They put the peptides on the surface and study them using a diamond sensor. ...
14 views