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8 views

Lead exposure risks

I work in a lab where I use methylammonium lead triiodide dissolved in DMSO and GBL. I know DMSO penetrates skin easily, and obviously lead is toxic. Today I accidentally splashed some on my arm, and ...
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4 views

Procedure to buffer 1L with pH=6 from 21.2g of sodium carbonate?

I need the procedure to buffer 1L with pH=6 from 21.2g of sodium carbonate. Are available solutions of NaOH and HCl 2,0mol/L. Also, what would be the concentrations of H2CO3, HCO3 and CO3 in that ...
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0answers
8 views

If you wanted to increase the pH of a weak acid by 1, how many times should you need to dilute it?

For strong acids, I know it's 10 times, but not sure how to quantify it for weak acids.
-1
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1answer
7 views

Why does the pH of the endpoint decrease when temperature of the titration is increased?

I was doing an experiment in chemistry class involving titrations. I would heat up different samples of vinegar and titrate them using NaOH. The trend that I found was how has temperature increase, ...
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6 views

Compressibility Factor and Generalized Compressibility Chart

From my understanding, the compressibility factor is defined by $$Z=\frac{pv}{RT}=\frac{p\bar{v}}{\bar{R}T}$$ It can also be defined by the ratio of the real molar volume of a gas to the ideal molar ...
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6 views

organic chemistry- iupac naming

How do you write tertbutyl in iupac naming? I know for iupac naming, I would need to write the substituents in alphabetic order, but would tertbutyl be considered t or b?
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0answers
12 views

Band structure of transition elements

Is the band structure of d block elements the same with the band structure of metals(half filled valence band and 0 band gap)?
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0answers
11 views

How to make the Sulphate in Calcium Sulphate available for ion exchange

I need to find a treatment for Gypsum that allows me to run it (diluted) through an ion exchange resin that will select out the sulphate and leave me the calcium. Please advice
-2
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0answers
6 views

How to do pressure affect homolysis?

I would like to know if high pressure is good for homolysis. Acording to chemical balance rules, if you making two substances from one (decomposition) (you have one mole of substance, and after the ...
-1
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0answers
15 views

With electrolysis turning water into hydrogen and oxygen will we eventually use up all the water?

I hope no one thinks this is a stupid question. I’ve often wondered when we split the water molecule into hydrogen and oxygen and we use hydrogen or oxygen as a fuel for or other uses. If I understand ...
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23 views

Solid state chemistry for d block elements

Many years ago I learned in high school that atoms don't want to 'share' their 3d electrons.Now that I am learning solid state chemistry I have read that the d atomic orbitals don't overlap with ...
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0answers
16 views

How do I set up the solution to this Dalton's Law problem?

I am doing a Dalton's Law assignment in my chemistry class right now and I am being asked to find the pressure of argon in this question but I am not sure how to go about doing it. Can someone explain ...
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0answers
15 views

Could you help me solve this problem? [closed]

In the following cell Pt,H2 p=?|HClO4(aq) 1.5 x 10-4 M || Cr3+(aq) 1 M, Cr2+(aq) 0.05 M |Pt, knowing that E0 Cr3+/Cr2+ = -0.401 V, calculate the partial pressure of hydrogen for which the ...
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2answers
54 views

How does an electron identify whether to absorb a photon of a certain wavelength or not in absorption spectrum?

How would an electron identify the specific photons of a certain wavelength which are to be absorbed in a Hydrogen atom while creating an absorption spectrum? Well, I was thinking of it like this- Way-...
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0answers
12 views

Is the elemental state of an atom, the same as ground state?

I am just now learning about oxidation numbers, in my chemistry class. My teacher used the term, the Oxidation state of the element in the free or elemental state is always zero. I am confused as to ...
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1answer
28 views

Explain the mechanism of glycerol solubility in ether.?

I need some guidance regarding the issue of solubility, as you can see in my question i have glycerol and ether. What factors play a role in the solubilization process between these two compounds? I ...
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0answers
19 views

How is the selective titration testing equation simplified?

When there is Mn+ and Nm+ metal ions in a solution, to perform a selective complexometric titration this condition need to be satisfied, K''MYn-4 = KMYn-4 αMn+...
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0answers
14 views

Calculate the temperature at which the above reaction can be spontaneous? If data for entropy and enthalpy for seperate constituents

Please find the attached. Its not a Homework question. Its a JEE question, I need help with for my preparation.
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1answer
35 views

Question regarding chemical equilibrium when adding a salt to acid solution

Having read the following was wondering something: $$\mathrm {p}K_\mathrm{a} = -\log\frac{[\ce{H+}]_\mathrm{eq}[\ce{A-}]_\mathrm{eq}}{[\ce{HA}]_\mathrm{eq}} $$ $$\ce{HA <=> H+ + A-}$$ $$\mathrm{...
-2
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0answers
30 views

Can I make NaBH4 from powdered borosilicate glass and sodium hydride?

How can I use borosilicate glass powder and sodium hydride to make sodium borohydride? Hope it's possible to list down some steps.. :) Thank you so much for taking the time to reply, and I'm really ...
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0answers
15 views

How do you find the reaction in CoCl2 Le Chatelier Experiment?

Recently, my school has given the task to experiment with CoCl2 virtually about Le Chatelier's Principle. One of the questions is to find the equilibrium constant. Problem is, I don't know what the ...
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2answers
35 views

Aromatic Substitution in acidic medium

Find product A. I tried solving but why isn't the answer this The answer is given this
1
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0answers
33 views

What is the correct Lewis structure of PO2F2-

There is an ion which I can draw 2 possible Lewis structures. You can see them below So,what is the correct structure of the ion and why is the other one wrong?
3
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0answers
26 views

Out of KCl, CaCl2, MgCl2, NaCl, which causes the greatest corrosion rate of iron and why?

I know that salts act as an electrolyte in a redox process and rusting of iron, where iron loses electrons and oxidizes, and oxygen gains electrons and reduces. I did an experiment with KCl, NaCl, ...
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12 views

particle in one box [closed]

Using the particle in a box model, the energy of the highest occupied energy level for a linear polyene of length 12 angstroms and containing 8 π-electrons is (m_e = 9.11 \times 10^{-31} kg? ​
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0answers
21 views

Electrolysis of water affected by electrolytes

Is conductivity and concentration the only factor because when I did an experiment wherein I measured the current for the electrolytes $\ce{Mg(NO3)2}$, $\ce{Ca(NO3)2}$ and $\ce{Sr(NO3)2}$? Despite the ...
6
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1answer
319 views

Why is it that protons and electrons undergo the same amount of deflection in an electric field if they have the same energy?

The question I have is with respect to this diagram. Which depicts a stream of protons and electrons entering a proton field with equal energy. Why is it that in the case where the energy of protons ...
1
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0answers
28 views

Why are complexes of type MA3B3 not optical active?

Complexes of type $\ce{MA3B3}$ have two geometrical isomers, namely: fac-isomer mer-isomer If we look closely at the mer-isomer, it has a plane of symmetry, so it is optically inactive. But the fac-...
3
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0answers
15 views

Chemical safety information: Where to look to find out how poisonous poisons are?

Could someone point me toward a primer on how to read the toxicity warnings on standard chemical data sheets? Or alternatively, where one should look for more precise information than is contained on ...
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2answers
24 views

Predict the valence configuration of this element using the first five ionization energies

If the first five ionization energies of an element are, respectively: $\pu{1.09 kJ/mol}$, $\pu{2.35 kJ/mol}$, $\pu{4.62 kJ/mol}$, $\pu{6.22 kJ/mol}$ and $\pu{37.83 kJ/mol}$, to which group of the ...
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0answers
18 views

Seperation of Elements in Modern Periodic Table

Why are the elements in Modern Periodic Table (Modern Periodic Table/Henery Mooseley Law) categorised into A and B. Also VIII is in none of the division, why?
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1answer
37 views

Why does nuclear waste contain plutonium?

According to this page on Wikipedia: Reactor-grade plutonium (RGPu) is the isotopic grade of plutonium that is found in spent nuclear fuel after the uranium-235 primary fuel that a nuclear power ...
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1answer
20 views

Disparity between LeChatelier's Principle and Solutions

Let's say that there is a solution $\ce{Na+(aq) + Cl-(aq) <=> NaCl(s)}$ If the above solution is at equilibrium we can say that it is saturated and hence no more Sodium Chloride will dissolve. ...
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10 views
-3
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19 views

Question about spectroscopy problem

How to show that CnHn(hydrocarbon) has just a single IR active C-H stretching mode? I am not sure the statement below is correct or not. In order for a vibrational mode to absorb infrared light, it ...
3
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1answer
39 views

Propagating uncertainty with the slope of a tangent line

I have done an experiment that found the initial reaction rate for a reaction that created gas in $\pu{kPa s^-1}$ by finding the slope of the tangent line at time = 0. How do I propagate uncertainty ...
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0answers
10 views

Chromium (IV) Oxide Sol Gel Process Synthesis and Properties

Is it is possible to solely synthesize an CrO2 aerogel through the Sol-Gel process? All documents I find are of a mix of oxides containing CrO2 as a supporting matrix but not alone. Would the CrO2 ...
-2
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2answers
55 views

Chemical Difference between Dexedrine and Methamphetamine

I am a newbie at chemistry and was wondering what the key difference between Dexedrine and Methamphetamine HCL is? I know that Methamphetamine has an extra methyl group compared to Adderall. But what ...
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0answers
13 views

Fischer-Tropsch Gas to Liquids on a Small Scale

I'm really interested in the Fischer-Tropsch GTL process. A lot of people are using wood or other biomass feedstock to make syngas on small scales (farms, shops, etc.). What would practically be ...
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0answers
16 views

Is it possible to extract taurine from energy drink by liquid liquid extraction, which solvent should I use?

I need to know how to extract taurine from energy drinks, because I'll be needing that for tlc analysis.
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0answers
26 views

Calcium chloride as a drying agent for solutions

I'm aware of the reaction Calcium chloride has with water vapour and how it can therefore be used as a good and inexpensive drying agent but could that be applicable for solutions? For example if ...
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0answers
23 views

Variation of battery potential with current density

It is found experimentally that the potential of an electrochemical cell with applied current density varies as follows: To produce the passage of current through a cell it is necessary to apply a ...
7
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3answers
370 views

What would a (gas) chromatogram look like if two compounds have the same retention times?

In gas chromatography, the number of peaks represents the number of compounds in an unknown sample, as retention times for each component differ. But what would happen if two components have the same ...
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0answers
24 views

Confusion regarding basicity

I am confused about definition of basicity. Article 1 says: “Basicity” Is Just Another Word For “Stability Of A Lone Pair Of Electrons” (source). Another article on the same website says: Generally ...
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0answers
25 views

Dissolving CNE (cresol novolac epoxy) resin covered computer chips

I intend to destroy (dissolving would be optimal) a few computer chips (NAND memory chips used eg. on SSDs to be precise). Why? See foot note. I am not a chemist, so of course I tried to research the ...
0
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1answer
25 views

Hazard and precautionary statements

Is there a scientific database where one can find all the H and P statements for all chemicals? I would like to avoid using wikipedia but I can't find a database from a trusted source.
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0answers
9 views

What is the weight percentage of 10 ml acetic acid with a concentration of 0.2 M?

I got 1.2% by doing $$ \frac{0.2 mol/L\times 0.01 L \times 60 gr/ml }{10 ml \times 1 gr/mol} = 0.012 $$ i am quite confident that my calculation was correct, but my chemistry teacher said that it was ...
2
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1answer
98 views

Chemical Volcano- Experiment

In a science exhibition in 2011 , I and my friend made a volcano that used vinegar and baking soda for the 'effects'. There was another group that made volcano too and they had brought their own ...
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0answers
16 views

Is there an accurate displacement reaction series including every element?

I have had the hardest time finding this information out. I would like to know the displacement order of every conductive element on the periodic table but I haven't found a single source of data that ...
4
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0answers
48 views

Why is ruthenium dioxide a conductor while titanium dioxide is an insulator?

Ruthenium dioxide has the same crystal structure as rutile (titanium dioxide), and the metal atoms are in the same oxidation state. Yet ruthenium dioxide is a metal-like conductor (its resistivity is ...

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