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Help with titration reactions

I have a few questions regarding some basic reactions. Our lab did an experiment where we first standardized NaOH with oxalic acid and then HCl with standardized NaOH. We noticed that there was a ...
Resident cyrptid's user avatar
2 votes
0 answers
13 views

How to quantify the concentration of sodium nitrate leftover from eutrophication through titration?

In my experiment, I am trying to quantify the nitrate absorption by duckweed. I need a titration method to measure the left over nitrate levels in the solution. However, this is to be done in a school ...
Chamuditha Amaratunga's user avatar
1 vote
1 answer
30 views

Hydrogen in Organometallic Chemistry

In the book, The Organic Chemistry of Nickel : Organonickel Complexes by PW Jolly, the reaction between sodium hexacarbonyldinickalte(-1) and ammonia produces hydride complex. Some possible ...
Shira's user avatar
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2 votes
0 answers
14 views

What is the highest known temperature where micelles exist?

What are the liquids involved in the formation of roughly spherical micelles at highest possible temperatures? What about surfactants? At how high temperatures have micelles been observed ...
Paul Kolk's user avatar
  • 230
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0 answers
28 views

Synthesis of Gilman reagent

So I will be refering to the image attached here while explaining my query. In the synthesis of Gilman reagent, in the 3rd step, my teacher told that the (R-) from RLi will attack the partially ...
Advait K's user avatar
0 votes
0 answers
21 views

How to identify whether given element is meta(-ate) ion or meta(-ite) ion?

Like why $\ce{PbO3-}$ is a meta plumbate anion because definition of meta(-ate) ion is that it has maximum oxidation state of Pb by using minimum oxygens. But in this case how oxidation state of Pb is ...
Jennifer's user avatar
4 votes
1 answer
124 views

Why are amber bottles used to store Water for HPLC?

Image Source: https://www.calpaclab.com/water-hplc-spectro-grade-4-liter-bottles-case-4/ted-ws2211-001 When ordering HPLC/Spectro grade Water for HPLC from certain vendors(not all), it comes in an ...
Ronith's user avatar
  • 1,315
0 votes
0 answers
27 views

Could you help me analysing and assigning peaks in the NMR spectra?

Can you help me account what peaks are from which group of hydrogens? I cannot quite figure it out because the peaks don't follow the splitting pattern to what I expect and also I am not sure how ...
Astro's user avatar
  • 1
0 votes
0 answers
13 views

Seeking Comprehensive GHS Hazard Database for Chemicals

I have been using PubChem as a source for GHS hazard information, but I have noticed that the database is incomplete for some chemicals. While PubChem is a great resource, I am looking for a more ...
Noushin Omidvar's user avatar
-5 votes
0 answers
32 views

Nitrogen is the chemical in nicotine that makes nicotine hazardous if that's true sodium should remove the nicotine and essentially remove its hazards [closed]

As a chemist what is the way to completely breakdown the compound nicotine or turn it into something harmless bonus if you can get rid of the other chemicals in cigarette smoke. These need to be ...
joeschmoe9's user avatar
-1 votes
0 answers
23 views

Sushells vs Orbitals...A visual distinction [duplicate]

Is there any coherent visual diagram that might explain how orbitals and subshells co exist in the same shell? I'm unable to find any online, except for those which indicate only orbitals as dense ...
Poonam Kamath's user avatar
0 votes
0 answers
33 views

About tannins in Equisetum Arvense [closed]

What is the name of the tannin found in horsetail? I know this one is bitter, but do all tannins taste bitter/astringent or are there exceptions ?
Quidam's user avatar
  • 117
0 votes
0 answers
25 views

What test would give me a qualitative recognition of the presence of benzene in methylphenidate?

I need a couple of tests to recognize the presence of benzene in my compound (methyphenidate). I've looked into tests with bromide or Freidel-Crafts reactions but I'm not sure if both or neither would ...
Lucy's user avatar
  • 1
0 votes
0 answers
16 views

Bicarbonate concentration in the RO permeate

I am facing a challenge since long ago, but have not been able to find a suitable solution for it. Please share your thoughts if you have the knowledge or experience in this area. I am running an RO ...
Mirwais 's user avatar
-1 votes
0 answers
22 views

fiberglass dust concern during using abrasive cutting disc

I know that there are some warning when getting in contact with fiberglass particles/dust,so my question is related to an abrasive cutting discs that made of resin and reinforced with fiberglass. At ...
xchcui's user avatar
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-2 votes
1 answer
45 views

What is reduced in the reaction of magnesium with oxygen? [closed]

What is reduced in the reaction $$ 2\mathrm{Mg} + \mathrm{O}_2 \rightarrow 2\mathrm{MgO} $$ An oxygen molecule or an oxygen atom ?
Peter swift's user avatar
-4 votes
0 answers
22 views

Determing a monomer in a polymer [closed]

Do monomers can be determined by me? It depends on the location which I start. It is sketched at the picture.
sjh's user avatar
  • 1
-2 votes
0 answers
29 views

Nanolines (?) out of questionable neutralization reaction

I have added $\ce{Na2CO3}$ and excess $\ce{H3BO3}$ and I see what I presume are white nanolines floating to the top, including several air bubbles in midst of the reaction. Therefore, I conjecture ...
Number Basher's user avatar
-5 votes
1 answer
34 views

Why should the pH change when I add sodium hydroxide to water?

I am a student and I am trying to understand the concept of pH. If I add pure $\ce{NaOH}$ in water, it leads to the formation of $\ce{OH-}$ ions in the water. But this shouldn't lead to any change in ...
Bhaskar Ghildiyal's user avatar
4 votes
1 answer
37 views

What is the particle speed in liquids at an average room temperature (20-25 degrees celcius)?

I've been searching online for ages and I can't find anything related to this, everything seems to be about gas particles relating to temperature. I'm investigating simple chemistry related to ...
Abigail Mckinnon's user avatar
1 vote
0 answers
44 views

Can a diamond dissolve in molten iron?

The melting point of diamond is 4000C and the melting point of iron is 1538C. However, the question is if a diamond is soluble in an iron solvent. Diamond is made up of carbons. And I know steel is ...
Gwen E's user avatar
  • 11
4 votes
1 answer
127 views

Where is the negative charge localized in tetrazolate ion?

I am seeing images of tetrazolate ion where the negative charge is placed at different locations: On the nitrogen atom Inside the tetrazole ring or On the carbon atom Is there any electronic ...
Nilay Ghosh's user avatar
  • 26.3k
0 votes
0 answers
51 views

Conflict: Sandmeyer reaction and Gattermann reaction

So it is known that benzene diazonium chloride when reaction with cuprous(I) chloride would produce a chlorobenzene which is called Sandmeyer reaction. Now for the same salt, if we react it with ...
Xlomer's user avatar
  • 11
3 votes
1 answer
61 views

How does the daguerrotype give directly a positive image?

I have read the wikipedia entry about the old photographic process called daguerrotype. It says there The image is on a mirror-like silver surface and will appear either positive or negative, ...
Alfred's user avatar
  • 131
1 vote
1 answer
38 views

Why does pectin/agar jelly taste sweet, if they stay solid at 36.5 °C, entrapping sugar?

When we eat pectin jelly(fruit jelly) or agar jelly, they taste sweet. This should imply that sugar entrapped in gel network is somehow exposed and dissolved to saliva. However, pectin and agar gel ...
new's user avatar
  • 209
-3 votes
1 answer
84 views

Is Continuous Energy from Water Electrolysis and Hydrogen Combustion Possible? [closed]

Is continuous energy from water electrolysis and hydrogen combustion Possible? Unlimited Fuel Myth Electrolysis of Water: Process: $\ce{2 H2O (l) -> 2 H2 (g) + O2 (g)}$ Energy Required: The ...
Ahmad AL Ghoroury's user avatar
-1 votes
0 answers
37 views

Why is the covalent radii of carbon significantly smaller than that of boron, and why do metals have more significant changes in radii

I’m currently looking at this graph of the 2nd-period covalent radii, and it seems like moving from boron to carbon, there is a more significant decrease compared to moving across the rest of the ...
Dale Yang's user avatar
4 votes
1 answer
75 views

Brilliant fluorescent properties of Na2S(x) obtained from Na2SO3 or Na2S2O3

When $\ce{K2SO3}$ or $\ce{Na2SO3}$ is heated strongly by any method (in a flame, in an electric arc, on a metal plate in an induction heater), the resulting residue should be a mixture of $\ce{Na2SO4/...
Nikita Danilov's user avatar
2 votes
0 answers
91 views

Cyclic Voltammetry for a Capacitor - Positive Current, Potential is decreasing?

In the boxed red region, why is the potential decreasing when the current is still positive? To my understanding, when the current is still positive (i.e. not changing direction), the capacitor will ...
photon's user avatar
  • 79
2 votes
0 answers
39 views

(Di)chlorination of phosphonic acid ester

What is the best way to do this reaction to form the dichloride as an reactive intermediate when the substituent R is acid sensitive? In the literature the reaction is either performed with PCl5, a ...
raptorlane's user avatar
0 votes
1 answer
47 views

Based on RPDs, how to tell which orbital ($2s$ vs $2p$ or $4s$ vs $3d$) is more stable ? How reliable is the "less shielded" argument? [duplicate]

Professor (from MIT $5.111$ class) argues that $E_{2s} < E_{2p}$ by just saying that, due to the little bump of $2s$ (on the left of its RPD graph), $2s$ is less shielded and, hence, has lower ...
niobium's user avatar
  • 173
-4 votes
0 answers
39 views

what will be the major product on mononitration of para-isopropyltoluene? [closed]

para-isopropyltoluene means an isopropyl group attach to the para position with respect to the methyl group of toluene. mononitration means treating with concentrated HNO3 and concentrated H2SO4 to ...
Rakesh Ghosh's user avatar
-5 votes
0 answers
20 views

What is the math model of a chemical measurement? [closed]

Wow to mathematically relate a measurement heuristic calculation of uncertainty, with the measurement math model?
Francisco Paula's user avatar
2 votes
0 answers
29 views

Sensitivity of CoSi2 to hydrogen

It is known that palladium is quite sensitive to hydrogen, i.e., has an extraordinary ability to absorb hydrogen. I was reading a paper that talks about the fabrication of a Pd based sensor for ...
mathemania's user avatar
3 votes
1 answer
61 views

How to make the energy level diagram of dichlorodiammineplatinum(II)?

The oxidation state of platinum in $\ce{[PtCl2(NH3)2]}$ complex is $+2,$ so its configuration will be $\ce{5d^8 6s^0 6p^0}$ and the shape will be square planar. But this complex has two strong field ...
Code Crox's user avatar
-1 votes
1 answer
79 views

Relative concentrations of ions in pure water with a pH of 7

Not a chemist here as the last Chemistry class I took was millennia ago, so please be patient with me. The Chem taught today is so different (and much harder) than I remember. So, regarding pure water,...
David Musoke's user avatar
0 votes
1 answer
79 views

Does a decomposition redox reaction with a single reactant and non-elemental products exist?

Does a decomposition redox reaction exist with a single reactant and non-elemental products and that this decomposition reaction cannot be decomposed in any condition to yield elemental products. For ...
user147259's user avatar
-4 votes
0 answers
35 views

Is chromic acid flakes the same as chromic trioxide flakes? [closed]

We have a formula for mixing chromic acid flakes with calcium sulfate to treat magnesium metal. We are having a very hard time finding where to buy a small quantity of chromic acid flakes. When ...
Brianah's user avatar
2 votes
0 answers
27 views

Is the $2p$ RPD defined along the z-axis?

In MIT $5.111$ class (lecture $6$), we are to compare the most probable radius of a $2s$ orbital and a $2p$ orbital. The graph used by the professor represents the RPD versus $r$: My question is: in ...
niobium's user avatar
  • 173
3 votes
0 answers
59 views

Short-circuiting an electrolytic cell with metal dendrites and observing interesting chaotic 1/f noise

While conducting home experiments on the electrolytic deposition of copper in a micro-gap (2-3 mm), under a microscope (x40) I observed interesting effects of short-circuiting by metal dendrites of ...
Nikita Danilov's user avatar
-2 votes
0 answers
33 views

Why can't benzene carbocation be stabilized by resonance effect?

I've seen that carbocations of cycloalkenes and those of benzene attached to more carbon atoms can be stabilized by resonance. Similarly, why cant benzene carbocation be stabilized by resonance?
Vibhas.D's user avatar
-4 votes
0 answers
56 views

What's the correct name of this compound ..?

In an exercise for naming organic compounds, the compound shown below is named “3-ethyl-6-methylcyclohexene” in my textbook and even on Pubchem (https://pubchem.ncbi.nlm.nih.gov/compound/3-Ethyl-6-...
vishesh jain's user avatar
1 vote
0 answers
59 views
+50

Fundamental reasons for using vapors for ALD rather than solutions

Atomic layer deposition (ALD) has been developed for many materials, as can be seen from this overview: https://atomiclimits.com/alddatabase/ However, a search for liquid phase ALD gives less results. ...
Paul Kolk's user avatar
  • 230
1 vote
0 answers
23 views

Doubly occupied orbitals in quantum chemistry? (openfermion.org)

I am interested in diagonalising the fermionic Hamiltonian of small molecules, such as LiH in second quantisation. The Hamiltonian is \begin{align} H(R) = \sum_{ij} h_{ij}(R) a_i^\dagger a_j + \frac{1}...
Quasilattice's user avatar
2 votes
0 answers
34 views

High voltage arc treatment leads to the appearance of fluorescent granules in soda baking. Perhaps it's the F-centers?

I have a high-voltage converter at home, consisting of a horizontal "flyback" transformer from an old tube TV, field-effect power transistors and a square-wave generator with adjustable ...
Nikita Danilov's user avatar
3 votes
1 answer
330 views

It is possible to synthesize 3,3-diethylpentane ("tetraethylmethane") from carbon tetrachloride?

Compounds like tetraethyl silane or tetraethyltin can be made from their tetrachlorides using ethylating Grignards, but what about substituting carbon, would it work or steric hindrance would prevent ...
Jakub Nadažy's user avatar
2 votes
2 answers
88 views

Choosing a transition metal catalyst instead of iron catalyst to investigate the degradation of methyl orange?

I was working on a dye degradation project for methyl orange (MO), using Fenton's Reaction. I plan on keeping a constant pH of 2. Normally, the reaction is done with an Iron catalyst, but at lower pH ...
Ronith's user avatar
  • 1,315
-2 votes
0 answers
36 views

Grignard reagent addition to carbonyl compounds [closed]

How does Grignard Reagent shows the addition reactions with carbonyl compounds? I'm having problems in the mechanism of the reaction. I know that Grignard reagent is a very versatile reagent apart ...
Tejas Joshi's user avatar
0 votes
0 answers
30 views

Are the s orbitals or p orbitals more involved in bonding within 3rd period elements

I understand that within most diatomic molecule systems such as nitrogen gas the electrons within the s-orbitals have a net nonbonding effect but the p-orbitals are the ones that are involved in ...
Dale Yang's user avatar
1 vote
0 answers
34 views
+50

Finding the relative position of the molecule in the adsorbate and adsorbent by minimizing the Hamiltonian

I am trying to model an adsorbing process (or more precisely, Heterogeneous catalysis process between solid catalyst and gas reactants). One of the step is to minimize the Hamiltonian by optimizing ...
Minh Triet's user avatar

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