# All Questions

29,055 questions
0answers
18 views

### What is the colour of hexaamminechromium(3)? [closed]

What is the colour of hexaamminechromium(3) when we add extra Ammonium hydroxide to Chromium Hydroxide?
0answers
28 views

### Charge phone using simple voltaic cell [closed]

Can i charge my phone using voltaic.cell and. How because i have cut the usb wire and found 4 wire in it which is red,black,green,white which one is connected to mg and which one is connect to copper
0answers
20 views

### Terpene cyclization on terretonin biosynthesis

I would like to ask about a terpenoid cyclization in terretonin biosynthesis in a research paper authored by Matsuda et al., Curr. Opin. Chem. Biol. 31, 2016. It is showed in the paper that The ...
0answers
18 views

### Coordination number of complex resulting from sodium nitroprusside test

In my textbook the following reaction is given to identify sulphide ion : Na2[Fe(CN)5(NO)] + Na2S --> Na4[Fe(CN)5NOS] (violet solution) Here's what I want to know : Is NOS a newly formed ligand? If ...
3answers
86 views

### What defines a discharged battery?

In the case of an AA Alkaline battery, what actually happens inside the battery once it is fully discharged? What components of the battery change as we use it?
1answer
48 views

### Proving a relation for fugacity of component i in term of independent variables (T,V)

In Molecular Thermodynamics of fluid phase equilibria by Prausnitz et al. [1] the authors recommend to use the following equation which gives the fugacity of component $i$ in terms of independent ...
0answers
63 views

### Mechanism for Friedel-Crafts Acylation in Synthesis of Sertraline

In the first step of the synthesis of Sertraline, aluminium chloride catalyst was used in a Friedel-Craft's reaction to give the following product. My question is how does the exact mechanism work? 1-...
0answers
43 views

### Where does copper form?

I thought zn and cu both lose 2e- to pt but someone is telling me it's wrong]
1answer
80 views

1answer
26 views

### Why is the major product of the reaction of 1-naphtol with benzene diazonium chloride not the ortho product?

If 1-napthol reacts with benzene diazonium chloride, it gives the para product with respect to the hydroxyl group. However, shouldn't the major product be the ortho one, because there will be ...
2answers
155 views

### Mechanism of ring formation of an epoxide under acidic aqueous conditions

I am trying to figure out the mechanism of this reaction: I think the $\ce{H+}$ will first attack the oxygen of the epoxide and another $\ce{OH-}$ will be added to the most substituted carbocation, ...
1answer
27 views

### Carbonic acid, bicarbonate in water [closed]

When you add CO2 into water, carbonic acid is created. From carbonic acid (H2CO3), HCO3 + H is formed. When CO2, and H2CO3 leave the water, does HCO3 leave as well, often measure as kH, carbonate ...
0answers
25 views

### Adding apple cider vinegar to a solid DIY deodorant

If I wanted to add a bit of apple cider vinegar to my oil based deodorant, to increase antimicrobial properties, would this cause me to need a preservative? My deodorant is not water based, so I don't ...
1answer
32 views

### How can one distinguish an IR spectroscopy alcohol band on an organic molecule versus the alcohol bands from water in the sample?

I'm reading this IR spectra and trying to determine if the large broad band at 3388 is alcohol from an intermediate or from water in the sample. The details of the reaction, conditions, and mechanism ...
1answer
44 views

### Can you lower the alcohol concentration of a drink using vegetable oils?

The log POW of ethanol is −0.18 according to Wikipedia, i.e. in a two-phase system ethanol would preferrably accumulate in the aqueous phase, but not by much. Suppose I wanted to lower the alcohol ...
0answers
20 views

### How can I make 2M of sodium hydroxide solution from 25g of sodium hydroxide pellet? [closed]

I have 25 grams of sodium hydroxide pellet. I want to prepare 2M of sodium hydroxide solution. How do I go about it, please?
1answer
46 views

### Maximum number of atoms in the ground state

I was given the following question. A sample contains $100$ identical and hypothetical $H$-like atoms ( $Z$ may be fractional). Out of the given atoms, some are in the ground state, while others ...
0answers
16 views

### Coordination compounds ean rule [closed]

Which complex follow the sidgwick rule Ean rule where M =24?
0answers
40 views

### when water and alcohol are mixed, why don't the boiling points change? [closed]

when water and alcohol are mixed, why doesn't the boiling points change? The vapor pressure should increase so the atmospheric pressure will equal to the vapor pressure faster, how do alcohol and ...
0answers
19 views

### Thermal conductivity of materials [closed]

Why does having delocalised electrons increase a materials thermal conductivity?
0answers
25 views

### If keto is attached to two carbon rings, enol alkane is always formed towards larger ring, why? [closed]

Can you explain me why does this happen ?
0answers
19 views

### Reaction of metals during electrolysis? [closed]

I am currently looking into what metals can be used for electrolysis....more specifically to split hydrogen from oxygen ....im curious as to what I may use metal wise that won't leave contaminants in ...
0answers
26 views

### Will a nail in a bottle rust without water being in the bottle? [closed]

Will a nail rust if it is in a bottle without water? Any help is appreciated as this is for a school project.
0answers
37 views

### Is Organic Chemistry Neccessary in the Med field [closed]

Is it necessary that one who wishes to go into the Medical field must study Organic Chemistry.
2answers
51 views

### MO diagram of BeH₂

I was learning about the MO diagrams of triatomic molecules and was left slightly confused about $\ce{BeH2}$. A picture of the MO is shown below: When looking at the $\mathrm{1s}$ combinations, I ...
0answers
29 views

### Derivation of mass flow rate and mean velocity [closed]

How do you derive the expressions for the mass flow rate, $\ce{w = 2bWρ<u>}$, and the mean velocity for the schematic below? How do you get the momentum balance: \$\ce{WΔx(ρu^2(x) + p_1) + LW\...
2answers
65 views

### Scientific Reason for Salt Solution Gaining Volume

A little background to this question: my mom placed a glass with salt and enough water to just cover the salt in a room to "absorb negative energy" out of the room at her office. It obviously "worked"....
0answers
46 views

### Why charged canonical structures of phenanthracene are not taken into account? [closed]

In the process of delocalization of pi electrons they do not directly jump between atoms instead it first finds place on a carbon or something else but why it is not in phenanthracene or any other ...
0answers
18 views

### Using Wilkinson's Catalyst to reduce esters?

I was solving some questions on alcohols when I came upon a question in which it was asked that whether esters can be reduced using hydrogen in the prescence of wilkinson's catalyst. Now I know that ...

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