# All Questions

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26 views

### Reaction of ethene with another double bond in presence of hv [closed]

First step i understand is syn addition of H but what is A + ethene in presence of hv giving?
26 views

### Rate determining step for parallel reaction?

I have always read that the rate determining step is the slowest step in a reaction (source: Wikipedia). In chemical kinetics, the overall rate of a reaction is often approximately determined by ...
555 views

### What does it mean to 'fuse' ores? [closed]

For the extraction of chromium, fusion of chromite ore with sodium or potassium carbonate in excess of air is done. What exactly happens in this 'fusion' process? source : ncert chemistry class 12 ...
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### Order of Reaction differs in equation and linearisation

I have given the following equation: $A + 2B \rightarrow C$ $v = –k\cdot [A]\cdot[B]^2$ gives me the orders 1 for A and 2 for B. That results in a total order of the reaction of 3. So far so good. ...
129 views

### Why Zn has highest ionisation enthalpy in 3d series?

Zn which has the highest ionisation enthalpy in 3d series.The reason given in my textbook is: The value of zinc is higher because it represent ionisation from 4s level. This is not correct because ...
101 views

### Reorganization during ionisation for d block elements

This is a quote from my textbook: The irregular trend in the first ionisation enthalpy of 3d lmetals,can be accounted for by considering that the removal of one electron alters the relative ...
11 views

### How is the enthalpy change of reaction, and neutralisation found [closed]

! This is question 1! This is the question 2! This is the answer for question 2 Hi, I am struggling to understand what I am calculating with I do my value for q (calculated from q=mcdeltaT) ...
63 views

### Reaction of Fe2+ and S2- to form FeS

Consider this reaction: $$\ce{Fe^{2+} (aq) + S^{2-} (aq) <=> FeS (s)}$$ The equilibrium constant for the reaction is $1.6 \times 10^{17}$ at $\pu{298K}$. If equal volumes of $\pu{0.06 M}$ ...
39 views

### Proton vs Electron forces [duplicate]

I understand that protons (positive) and electrons (negative) are attracted to each other through electrostatic forces. I also understand that as you go across a period, the more protons you add to ...
66 views

### What happens to the crystal structure of ice as it gets colder and colder [duplicate]

Not sure if this belongs on Chemistry or Physics stackexcahnge. As water freezes into ice, it turns into a solid, and expands as it forms a crystal structure. But what happens to this crystal ...
38 views

### If I dissolve 0.1M of CaCl2.2H2O in water, do I get a 0.1M CaCl2 solution? [closed]

If I dissolve $\pu{0.1 M}$ of $\ce{CaCl2.2H2O}$ in water, do I get a $\pu{0.1 M}$ $\ce{CaCl2}$ solution?
24 views

### Electrical conductivity and the limits of Kohlrausch's law

I am currently writing a lab report on electrical conductance and I realized that my partner prepared $\pu{0.1 M}$ solution instead of $\pu{0.01 M}$. Now, I am supposed to find the molar conductivity ...
35 views

### Shielding effects and atomic size [closed]

The atomic size on going from aluminum to gallium decreases because of poor shielding effect of the $(n-1)d$ electrons, but on going from copper to zinc, the size increases due to the same shielding ...
46 views

### Boat Conformer of Cyclohexane Stable?

It is well-known that the "chair" conformation of cyclohexane is the most stable of it's conformers. But is there any cyclohexane derivative where the other notable conformers (boat, half-chair) are ...
53 views

### Does an aryl compound with any functional group attached to it, undergo benzylic oxidation? [duplicate]

> If you look at this compound, only the benzylic carbon on the top has a hydrogen attached to it, so how do we oxidize only the top part without touching the lower one (not sure if this product is ...
51 views

### Proof for Arrhenius equation [closed]

The Arrhenius equation states that: $$k=A\mathrm e^{\frac{-E_\mathrm a}{R T}}$$ What is the mathematical proof for this equation?
58 views

### How are reaction enthalpy and entropy affected by temperature

The equation for Gibbs Free Energy demonstrates how the standard change in Gibbs Free Energy for a reaction is affected by temperature. $$\Delta G^\circ = \Delta H^\circ - T\,\Delta S^\circ$$ ...
36 views

### Liquid neon freezer?

Liquid nitrogen is approximately -330 degrees Fahrenheit. Liquid neon is approximately -413 degrees Fahrenheit. I want to know about if this type of freezer is easily possible in practice and if such ...
13 views

### Find drugs that have a particular solvent in a database [closed]

Is there a database where I can filter drugs for animal/human use by what ingredients/solvents they have? I'm specifically looking for all the drugs with a specific solvent/chemical compound.
36 views

### Calculating the energy of a molecule using probability distributions

I wish to calculate the energy for a protein where the position of all the C-alpha atoms is known. One way is to calculate the pairwise distances between the atoms and then look up a probability ...
59 views

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### What are common solvent removal methods?

In a laboratory setting, the most common solvent removal method is rotary vacuum distillation. This is something I have performed many times, starting in organic chemistry labs. However, I am ...