# All Questions

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### The relationships between n , T , P , V for a gas?

The symbols : T : temperature // V : volume // P : pressure // n : number of mole what it is clearly known about the relationship between one another is : P is inversely proportional to V ( from ...
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### Rationalising the order of reactivity of carbonyl compounds towards nucleophiles

This is immediately following ron's answer from Why is a ketone more nucleophilic than an ester? One of the most simplest questions you can ask, how can you rationalise the order of reactivity ...
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### How to obtain product ratio from energy differences via Boltzmann statistics

I am currently calculating some reactions and I would like to express the ratio of the products in per cents. I am using the Boltzmann statistic in the following way: The probability $p_j$ of a ...
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### Electrochemistry question about equilibrium in half cell reaction

Given the following half-reactions: $\ce{Ce^{4+} + e− -> Ce^{3+}}$ E° = 1.72 V $\ce{ Fe^{3+} + e− -> Fe^{2+}}$ E° = 0.771 V A solution is prepared by mixing ...
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### What is the chemistry of this household cleaning recipe?

What would be the product if baking soda and common salt and vinegar are added together?
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### Is it possible to remove salt from food without changing the flavor?

I love soup, even a thick soup for dinner, yet many soup products have 400 to 1000 mg of sodium in them. Is there a simple chemical procedure any consumer could do to take the sodium out of the ...
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### Why Aren't Chlorides Of The Noble Gases As Prevalent As Their Fluorides?

I can't find the answer to this question on this SE website, and I apologize for the repetition if it has been answered before. It is my understanding that compound formation has only been observed ...
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### How could household vinegar create a salt on car carpet?

I am not a chemist! My chemistry classes from my molecular biology undergrad are far behind me. But I think I created a salt, and I don't know how. Here is my mystery: I recently got some water in my ...
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### Carbonyl/Nitrosonium Complex Stability

Why is the nickel complex exhibiting the strongest pi-bonding? From what I understand, charge density plays a role. Also we need some empty orbitals on the metal cation, since we're looking at ...
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### Removing the hydrazine byproduct from the mitsunobu reaction

Looking to remove the hydrazine byproduct left after the mitsunobu reaction. Using DIAD and polymer bound triphenyl phosphine. The reduced diad is coeluting with my product on silica. My thoughts for ...
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### Explanation for increase in the number of oxidation states for transition elements from Sc to Mn of the 4th period

From Sc, to Mn, the number of oxidation states increases from one (Sc) to seven (Mn). The explanation for this is because the unpaired 3d electrons can be lost along with the 4s electrons during ...
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### What do the half-reactions need to be for balancing a redox reaction in an acidic medium?

Question: Balance the following reaction: $\ce{CuS + SO4^{2-} -> CuO + SO2}$ My Efforts: Number mentioned in the brackets oxidation number of S I have found out that the oxidation ...
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### What is the proper Lewis structure for HCOOH?

I tried to draw the Lewis structure of $\ce{HCOOH}$ but I didn't get the correct representation. As you can see in the picture below, at no. 1, I put $\ce{C}$ as the central atom because it has less ...
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### How to crystallize out reaction mixture from DMF?

Reaction was carried out in DMF, and TLC shows that the reaction has completed. But how to separate reaction mixture i.e. product from DMF?
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### Counting Nodal Planes in cyclopropane

The energy of molecule orbitals increases with more nodal planes. W1 (in the attached picture) has no nodal plane. I'd like to know how to draw the nodal planes in cyclopropane molecule orbitals but ...
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### Does vinegar neutralize the strongly basic compounds in cement?

I have heard that washing one's hands with vinegar is effective in neutralizing the strong bases in cement and is more effective than water. I want to know how cement burns and what bases are ...
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### Kinetic and Thermodynamic Stability

My prof noted that if the two components of any ionic compound undergo a large extent reaction with each other, then the substance CANNOT exist as a pure substance. For example, consider ammonium ...
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### Electrochemical Cell Polarity

In an electrochemical cell, the anode undergoes oxidation and the cathode undergoes reduction. This means that the anode loses electrons while the cathode gains electrons. However, the anode is ...
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### How to test for presence of Tobacco/nicotine in a product?

I found this paper that says nicotine was found in major toothpaste brands in India. Rather than playing blame game, wouldn't it be easier to test ourselves ? How to test for presence of ...
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### Height of potential barrier

Could anyone please help to find the height of potential barrier between silver and copper or cu-cu. I am working on a piezo- resistive sensor based on copper fabric and silver electrodes. I was ...
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### What happens when we heat an atom?

Question is simple.. If we take an atom of any element and then supply heat energy to it then what will happen? Acc to me in beginning energy[quanta(due to excitement of electron and then moving ...
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### High/low density water solution values

I would like to know what min and max values of densities are achievable with water solutions. There are some conditions: 1. Normal or close to normal temperature; 2. Non-radioactive ...
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### Why do different alcohols have different effects on the brain?

I've been trying to understand why different alcohols have different effects on the brain. Methanol is obviously poisonous, apparently because it's converted to formic acid. Because the body seems ...
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### Shape Of Cetyl Alcohol

Why is cetyl alcohol bent at the 9th position?
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### What Quantum Chemistry Model Should I Use?

Sorry for such a elementary question, My Main purpose is using Quantum Chemistry for simulation of some reactions. Actually we are working on making some new polymers and I need to simulate some ...
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### Low Melting Glass

What kind of glass can I purchase that will melt in a Bunsen burner flame? Follow up question: Is there any way to treat glass such that the melting point is lowered? I tried adding some sodium ...