Questions tagged [inorganic-chemistry]
Inorganic compounds generally do not have C-H bonds, while organic compounds do have such bonds. The distinction between inorganic and organic chemistry, however, is far from absolute.
3,184
questions
7
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1answer
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“T” in subscript in formulas
Does a “T” in a formula subscript indicate all possible numbers of atoms? $\ce{FeO_T}$ is the specific one I came across (in the "bulk chemistry" table here: https://sciences.ucf.edu/class/...
4
votes
1answer
62 views
Dipole moment in NF3 versus NH3
The usual explanation for the molecular dipole moment of NF$_3$ being smaller than that of NH$_3$, despite the N-F dipole being stronger than the N-H dipole, is that influence of the lone electron ...
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0answers
16 views
Electronegativity comparison [on hold]
Can someone please explain me why the electronegativity order of hybrid orbitals goes like this:
sp>sp2>sp3?
I am just new to this chapter of chemical bonding so a simple explanation will do the ...
-3
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0answers
27 views
The intuition behind usage of wt% in K_T? [on hold]
Why are they not taking the percentage of $a_{\ce{AlN}}$ while in the denominator wt% is being taken. My question is why not simply the weight instead of weight percentage and secondly if at all we ...
4
votes
2answers
124 views
How can a neutral atom attract electrons when it's supposed to have zero charge?
A neutral atom is an atom with an equal number of protons and electrons
We know the force of attraction between the proton and electron is equal
and assuming that:
one proton's positive charge ...
0
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0answers
29 views
Would it be possible to use phosphorus pentoxide as a heat storage material?
The reaction of phosphorus pentoxide with water shows the exorbitant solution heat of -377 kJ/mol (according to german Wikipedia; don't know if it means as per mol P2O5 or per mol P4O10).
Is this ...
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0answers
19 views
KIO3+Cl2+KoH ->KIO4+kCl+H2O [on hold]
Determine the amount of KIO3 necesaary to react with an escess og Cl2 and KOH,to obtain 50g of KIO4,knowing that the following redox reaction(to be balanced)has 95% of yeilds: KIO3+Cl2+KoH ->KIO4+kCl+...
1
vote
2answers
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Can you give examples for a halide ion reacting with interhalogen compound to give polyhalides?
Interhalogen compounds are formed when two halogens $(\ce{F},$ $\ce{Cl},$ $\ce{Br},$ $\ce{I})$ react together. They are represented by $\ce{XX'_n},$ where $\ce{X}$ is halogen of larger size and $\ce{X'...
1
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0answers
21 views
Why is lead's first ionisation enthalpy greater than that of tin?
Using Slater's rule, I found that both lead and tin's $Z_\mathrm{eff}$ for 6p and 5p electrons equal. However, the ionisation energy is different. Is comparing ionisation enthalpy on the basis of $Z_\...
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0answers
31 views
What common elements and compounds is fluorine most attracted to? [on hold]
What common elements and compounds is fluorine most attracted to? In example if you want to migrate the element from source A to source B what would be a good and fairly available element and/or ...
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0answers
15 views
Polarity of bonds in 15th group hydrides [on hold]
Determine the order of polarity of bonds in the following compounds:
PH3,AsH3,SbH3,NH3
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2answers
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Storage of Halogen [on hold]
I learned that we should store Bromine in brown coating glass bottle. But, I heard that halogen liquid is so reactive that it can melt even glass. So, I want to know the practical storage method of ...
0
votes
1answer
29 views
Electrons distribution of oxygen atoms in ozone [on hold]
While dealing with the Lewis structure for ozone, most of the explanations show the electron distribution around the 3 oxygen atoms with a single and double bond.
But if you count the number of ...
0
votes
1answer
34 views
Balancing the chemical equation using Oxidation Number Method [on hold]
Permanganate ion reacts with bromide ion in basic medium to give manganese dioxide and bromate ion. Write the balanced ionic equation for the reaction.
Please balance the equation using the oxidation ...
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0answers
14 views
Calculating the molarity of strontium phosphate from given quantities [on hold]
10 g of strontium is reacted with 50 mL of 1 M phosphoric acid to form strontium phosphate and hydrogen gas. What molarity of strontium phosphate is formed?
Equation of reaction:
$$\ce{3 Sr(s) + 2 ...
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0answers
27 views
please help me visualize bond angle? [closed]
Please help me visualize bond angle! "I mean there are no lines in compounds how we measure angle between such imaginary lines?"asap
0
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0answers
22 views
What will cure sodium silicate besides CO2? [on hold]
I would like to cure water glass or sodium silicate. I tried air drying, but the skin that forms seems to prevent the rest of the compound from curing.
0
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0answers
17 views
Determining formula of potassium molybdate from the amount of metal deposited during electrolysis
$\ce{K2MoO_n}$ in an acidified solution is electrolysed, $\pu{0.112 L}$ of oxygen is liberated and $\pu{0.32 g}$ of $\ce{Mo}$ is deposited (Atomic mass = $96$). Find $n.$
Now for this, I calculated ...
10
votes
3answers
862 views
What does a comma signify in inorganic chemistry?
$\ce{(Ca{,}Co)CO3}$
I have never ever seen this before. What does this mean exactly?
0
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1answer
48 views
Synthesis of copper selenide
If I react selenium powder with copper chloride powder above the melting point of selenium (221 °C), will I end up with a chunk of copper selenide, with the chlorine given off as gas, or will I lose ...
-1
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0answers
20 views
Is the black carbon powder useful for preparing printers black ink(water-inks)? [on hold]
I need to prepare black water ink for printers.
Is The carbon black powder is the right pigment to create black water ink for printers.
What are the specifications of the perfect black carbon powder ...
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0answers
29 views
Why at lower pH than pKa, acid doesn't dissociate to give H+ ions [closed]
I understand mathematically that pH lower than that of pKa, acid will be present in undissociated form but can anyone explain it qualitatively (logic) why it is so?
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0answers
22 views
Do any decent thermochemical databases exist? [duplicate]
The more thermochemical properties the better, but specific heat/ specific heat capacity is what I am looking for.
0
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0answers
20 views
Why does the dipole moment order of group 15 hydrides increase down the group?
The order given in my book is
NH3>SbH3>AsH3>PH3
Phosphorous is more electronegative than As and Sb then shouldn't the dipole moment be more in case of PH3 .
And why does the anomaly of NH3 occur?
1
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0answers
23 views
Determining the composition of basic copper sulfate by titrimetry
A colleague shared an undergraduate level classical gravimetry/titrimetry experiment on determining the stoichiometry of basic copper sulfate. I am looking for a reference for this type of experiment. ...
0
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0answers
24 views
Why does ammonia have higher melting point but lower boiling point than HF? [duplicate]
I guess the reason is hydrogen bonding, but shouldn't both the trends be similar in that case?
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votes
1answer
28 views
Exact weights for a chemical reaction og Silver and Nitric Acid [closed]
I'm an amateur analog photographer and want to react Nitric Acid (62%) and silver to Silver nitrate. Silver nitrate is the basis for almost all black and white photography.
I'm trying to figure out ...
0
votes
1answer
47 views
Why the formation of PH4+ is difficult compared to NH4+?
My textbook asks this as an objective question.
What I had in mind was that the lone pair on phosporous was more distributed as compared to nitrogen(since nitrogen is more electronegative and smaller ...
1
vote
0answers
16 views
How to extract melanin from human hair [closed]
I am working on a project wherein I am studying various properties of human hair and its utilization..I would like to know method by which we can extract melanin from human hair. Can anyone suggest ...
1
vote
0answers
25 views
Measuring change in concentration of hydrogen peroxide
I am conducting an experiment to find the rate constant of the decomposition of hydrogen peroxide, $\ce{H2O2}.$ For this, I was planning on using the integrated rate law:
$$\ln(\text{final ...
1
vote
0answers
44 views
Calculating ionic strength and pH of a buffer solution [closed]
Im trying to calculate ion strength and pH of solution.
Components of the solution:
47 ul of 1000 pmol DNA in Elution Buffer (10 mM Tris-HCl pH 8.5) was bound to 3 ul of 10 µM YoYo1 (flourescent dye) ...
0
votes
0answers
23 views
Lewis dot structures of carbonate, nitrate and phosphate anions
According to the Lewis dot structure, which of the following anions has more than 4 bond pairs around the central atom?
1) carbonate anion
2) nitrate anion
3) phosphate anion
4) none of ...
2
votes
1answer
66 views
Coordinate bonds between molecules
For the following question
Which molecules react to form a dative/coordinate bond?
A. $\ce{CH4}$ and $\ce{NH3}$
B. $\ce{C2H2}$ and $\ce{Cl2}$
C. $\ce{NH3}$ and $\ce{HF}$
D. $\ce{Cl2}$ ...
6
votes
1answer
98 views
How does the energy released during a bond formation typically manifest itself on atomic level?
Chemistry newb here. I've been reading about how energy is released when new chemical bonds are formed but it's hard to find info on how that typically manifests itself (besides that it's via heat). ...
2
votes
1answer
71 views
Is Scandium considered a transition metal?
I have seen so many conflicting answers to this question in various places so I wanted to ask it again.
IUPAC defines a transition metal as:
"an element whose atom has a partially filled d sub-...
3
votes
1answer
104 views
Rechargeable Battery Based on Neutralization Reaction of Acid and Base [closed]
The neutralization reaction, such as $\ce{HCl + NaOH → NaCl + H2O}$, generates heat, which is around $\pu{57.30 kJ/mol}$.
Can we use this energy to design a battery?
This idea occurs in my mind for a ...
0
votes
0answers
13 views
Electron shells and subshells energies [duplicate]
According to what i learned in university, the energy of orbitals increases when the principal quantum number n increases. Also, in a given shell, s orbitals have lower energy than p orbitals which ...
0
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0answers
28 views
However what is so acidic about CaO and basic(no pun intended) about SiO2 while calculating basicity of slag?
I have seen Basicity to be calculated as $\mathrm{B} = wt\%\:\ce{CaO}/wt\%\:\ce{SiO2}$ particularly in slag bascity/acidity calcuations. Now I do not think that $\ce{CaO}$ is the most basic oxide that ...
1
vote
1answer
69 views
Why do we use coke instead of coal in order to reduce FeO as basic reaction in ironmaking process?
Why is coke used as a reducing agent to reduce FeO to produce iron instead of coal.I admit that coke is carbonaceous but what is it that compels us to use coke instead of the naturally available coal?
0
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0answers
15 views
n+l rule for first member of lanthanide and actinide series
as we all know that if the value of $n+l$ is same then the orbital with lower value of $n$ will get filled first so in case of first member of lanthanide series the configuration is $(\ce{Xe})\mathrm{...
0
votes
2answers
89 views
What is the origin of the Quadratic factor in calculation of XRD peaks?
Whenever we are to calculate the d-spacing(for cubic system) in XRD peaks with reference to Quadratic Factors we do that with the help of the formula $$\frac{1}{d_{hkl}^2}=\frac{h^2+k^2+l^2}{a^2}.$$
...
1
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1answer
52 views
How to determine pressure and concentration of carbon dioxide in blood plasma?
A man suffering from untreated diabetes mellitus is admitted to a hospital. Doctors fear that his blood $\mathrm{pH}$ may have dropped because of ketoacidosis. Analysis of his blood reveals that $[\ce{...
-1
votes
1answer
34 views
How can I prepare two phosphate buffer of different concentrations but give same pH? [closed]
How is it that buffers of different compositions can have the same pH? For example, it is possible to prepare 0.01 M phosphate buffer of pH 7.0 and 0.1 M phosphate buffer of pH 7.0? How?
I used ...
-1
votes
1answer
38 views
How to find the resist in pH change when both are same buffers of same concentration? [closed]
We are given two buffers [a) 0.1 M phosphate buffer of pH 7.7 and (b) 0.1 M phosphate buffer at pH 6.71 . If acid is to be added to the buffers, which of them, will resist the pH changes better
I ...
3
votes
0answers
26 views
Are Slater’s rule and lanthanide contraction contradictory?
According to most textbook and the Wikipedia page of lanthanide contraction, the phenomenon is due to poor shielding of nuclear charge by 4f electrons. However, the σ value of 4f electrons to 6s is 1....
0
votes
1answer
77 views
How can I calculate the equilibrium constant for this reaction?
Silver(II) oxide partially decomposes into solid silver and oxygen gas according to:
$$\ce{2 AgO(s) <=> 4 Ag(s) + O2(g)}$$
with enthalpy $H^\circ = \pu{62.0 kJ}$ and entropy $S^\circ = ...
0
votes
1answer
23 views
Why doesn't the expermintal molar solubility match the one calculated by the Ksp value?
For $\ce{HgCl2}$ ($M = \pu{271.52 g mol-1}$), the reported $K_\mathrm{sp}$ value is $10^{-15.69}$.
This means that the calculated molar solubility of $\ce{HgCl2}$ in water is $(10^{-15.69}/4)^{1/3}\...
8
votes
2answers
337 views
How do I solve such questions on paramagnetism and ferromagnetism?
Match the type of magnetism given in Group I with the material given in Group II:
$$
\begin{array}{ll|ll}
\hline
& \textbf{Group I} & & \textbf{Group II} \\
\hline
\text{P} & \...
-3
votes
1answer
41 views
Why is sodium peroxide not of white colour even if it is paramagnetic? [closed]
Is colour always associated with paramagnetism?
2
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0answers
56 views
Why CO is a stronger and more common ligand than N2?
Both N2 and CO are considered sigma-donor and pi-acceptor. Their MO diagram is similar, so I wonder why CO binds generally more strongly and it is a more common ligand.
