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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.

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Would it be possible to destroy gold?

I'm a writer. I have a scenario in which a sizable amount of gold needs to be rendered unusable, preferably completely destroyed. I know an acid like aqua regia is able to dissolve gold, but would ...
5
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1answer
61 views

Why is the Van der Waals constant of water lesser than benzene?

Van Der Waals constant of water and benzene ($a$) are $5.537$ and $18.82$ respectively. I have read that the value of Van Der Waals constant indicates the extent of attractive forces. By this, ...
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0answers
22 views

Preparation of Copper (II) Sulfate Pentahydrate Solution

how would you make a solution of Copper (II) Sulfate Pentahydrate to achieve 150, 200, 250 and 300 mgL−1 concentration of copper? I do not have the anhydrous version of the solute. Also, when I ...
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2answers
21 views

Influence of pH on precipitate crystallite sizes?

It's normally assumed that a higher pH of solution would slow nucleation rates and hence lead to larger crystal formation. I've found literature that it is due to solid-liquid inter-facial tension. ...
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1answer
57 views

Equation for reaction between chlorine fluoride and potassium bromide

The equation given in the answer key was $$\ce{ClF + 2KBr → KCl + KF + Br2}$$ However won't the $\ce{KCl}$ also react with $\ce{ClF}$ to form $\ce{KF}$ and $\ce{Cl2}$, resulting in the net reaction ...
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1answer
269 views

How to find the combining valence of an anion when it exhibits variable valency?

I'm doing an online course and can't for the life of me figure out how to write chemical formulas from the chemical name. Take the example of calcium chloride. I know the the valence for calcium is ...
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0answers
3k views

Bond angle order of SF2, OF2, HOF

Arrange the following componds in the increasing order of bond angle. $$\ce{HOF,~OF2,~SF2}$$ I know that bond angle of $\ce{SF2}$ will be less than the bond angle of $\ce{OF2}$ because of larger ...
4
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1answer
56 views

What is the crystal structure of bismuth oxyhydroxyphosphate (BOHP)?

The recent Chemical & Engineering News article Photocatalyst shreds drinking water contaminant PFOA report the following: Cates and his colleagues made an accidental breakthrough while testing ...
3
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1answer
25 views

Electronic configuration of the actinides

I was reading about actinides and I need some help in understanding this paragraph from Concise Inorganic Chemistry by JD Lee - The electronic structures of the actinides do not follow the simple ...
3
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1answer
79 views

Hydrate decomposition equation steps

When a hydrate decomposes it loses water molecules in steps. Does each step have a chemical equation? If so is the following equations for decomposition of cupric sulfate hydrate correct? $$ \begin{...
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0answers
667 views

What is the hybridisation state of the sulfur atom in S4N4F4?

The molecule is shown in the textbook as: I can rationalise that the N is sp2 hybridised with a single electron in the p-orbital perpendicular to the plane of the S/N ring. (The sp2 lone pair is ...
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2answers
304 views

What happens to iron electrodes (attached to a battery) in copper(II) sulphate solution?

After a few hours, the following observations were made: The solution turns green. My guess: $\ce{FeSO4}$ is formed. There are reddish-brown and black powder deposits on both the electrodes. The ...
5
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1answer
129 views

HDEHP and complexes formed in extraction

I did an solvent extraction of $\ce{Eu(III)}$ using $\ce{HDEHP}$ from nitric and hydrochloric acid solutions to determine which acid, and which concentration, will yield the highest distribution ...
0
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1answer
187 views

What does thermal stability of compounds depend on?

Does it somehow depend upon the lattice energy of the compound? My textbook says that Lithium carbonate is not so stable to heat and forms more stable $\ce{Li2O}$ and $\ce{CO2}$. Could it depend on ...
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1answer
281 views

Thermal stability order of NaF, MgF2 and AlF3

I came up with a question to arrange thermal stability order of $\ce{NaF}$, $\ce{MgF2}$ and $\ce{AlF3}$ and I think the answer is $\ce{NaF>MgF2>AlF3}$ because $\ce{Na+}$ has largest ionic radius ...
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0answers
225 views

OF2 vs O2F2 oxidising strength

My teacher said that OF2 is the third most powerful oxidising agent after F2 and atomic O, but I think O2F2 should be even more oxidising, since it less stable than OF2. I just read on quora that O2F2 ...
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2answers
48 views

Materials used in cooktop heating element, and reason for black appearance

I have been interested in the structure of heating elements/coils used in cooktops. I am referring to something such as in the following picture: I have a cooktop at home with such elements, and at ...
1
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1answer
60 views

Negative oxidation state

Why doesn’t aluminum have negative oxidation states? In almost all compounds of aluminum which I know of has positive oxidation state. It has valence EC [Ne] 3s2 3p1 , my teacher told it usually ...
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1answer
70 views

Help with finding the right catalyst and reaction conditions for hydroamination reaction

A friend of mine, final year PhD, and I, final year Bachelor, are focusing on hydroamination reactions. In particular those with secondary amines and substituted alkenes. The reaction in particular is ...
2
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0answers
35 views

How can we conduct reactions for insoluble materials?

I am working on metal organic polydehra topic to synthesize new metal-organic cages or other based frameworks. I want to conduct postsynthetic modification for one cage, but the solubility is very ...
5
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1answer
2k views

Comparing Acidic Strength of H3PO4 and H3AsO4

The $pKa$ values for H3AsO4 and H3PO4 are $2.30$ and $2.12$ which indicate that H3PO4 is a stronger acid compared to H3AsO4. I looked up their electronegativity values to find that they are almost the ...
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0answers
18 views

Why hydrate metal precursors used in synthesis of metal-organic frameworks, MOFs?

To synthesize metal-organic frameworks materials it mostly uses the hydrate metal precursors, so why should we use this kind, and can we use the anhydrous salt?
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1answer
3k views

Why is the melting point of PCl3 less than that of PCl5?

From just the IB chemistry bonding chapter information, you would normally deduce that $\ce{PCl3}$ and $\ce{PCl5}$ are both covalent molecules. However, as $\ce{PCl3}$ has a dipole moment, it has ...
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0answers
19 views

Changes in metal-ligand bond lengths of coordination compounds

Consider change in length of the metal-ligand bond in the following reaction: $\ce{[Cr(CN)6]^3- + e^- -> [Cr(CN)6]^4-}$ I initially had two theories (based on general electrostatics and d-...
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1answer
61 views

Why does sp hybridised orbital have more directional character than p orbital?

It states so in my textbook. But since s orbital is non directional, shouldn't sp hybridized orbital be less directional in character than p orbital?
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0answers
186 views

Does soda-lime glass contain carbon?

Soda-lime glass is made by melting together soda (sodium carbonate), lime (calcium oxide), dolomite (calcium magnesium carbonate), silica (silicon dioxide), alumina (aluminum oxide), and small ...
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2answers
41 views

Chemical reaction

Consider the following Ca(OH)2 + 2NH4Cl → CaCl2 + 2NH3 + 2H2O (Source: https://chemiday.com/en/reaction/3-1-0-440) It appears to be double displacement reaction as CaCl2 is formed, but it’s not as ...
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0answers
24 views

Relation between size and lattice energy

I came across the statement “BeO and MgO have high melting point because of the lattice energy of BeO and MgO is appreciably high due to their small size” in my mAterial I didn’t understand what ...
7
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1answer
136 views

Can glass be made with anorthite?

The lunar highlands are made mostly of anorthosite (90% anorthite, the rest oxides of magnesium, iron, a little titanium, and traces of others), and pretty pure anorthite ($\ce{CaAl2Si2O8}$) is common....
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2answers
88 views

Carbon in Glass - XPS Analysis

I was reading a paper and found this elemental XPS analysis of an unmodified microscope glass slide surface. C (1s): 17.7% Si (2p): 28.47% O (1s): 53.83% It seems strange for a piece of normal ...
3
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1answer
117 views

What exactly is the parasitic white layer that forms after iron parts are treated with ammonia? [closed]

I have little to do with chemistry and my only background is the inorganic chemistry I learned at school when I was 13-14 years old. I need to have a basic understanding of the nitrating process (for ...
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0answers
56 views

Which has greater N-O bond length: NO or NOCl?

I came across this question. According to me NO should have a shorter bond length as it has a triple bond, while NOCl has a double bond. But the answer is given that NO has greater bond length than ...
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0answers
26 views

I have prepared ferrous sulfate solution in water. After some time, brown precipitates observed. How to prevent the same?

When ferrous sulfate solution is prepared in water, after some time, brown precipitates appear, how to prevent the precipitates.
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0answers
120 views

Assignment of the 13C NMR spectrum of 1-(ferrocenyl)ethanol

The molecule in question has the following structure: (source: sigmaaldrich.com) The 13C NMR is given below: My assignments are: 23.700 ppm, -CH3 65.569 ppm, CH adjacent to the -OH 66.138/66....
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2answers
405 views

How does strength of boric acid solution increase in presence of salicylic acid?

A while ago, I read that salicylic acid can make boric acid solution strongly acidic when it's added to it. To my knowledge, I know that boric acid becomes a strong acid in presence of cis-diols (...
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1answer
96 views

Does aluminium dissolve in soda glass?

Specifically, if a piece of aluminized glass is heated to the melting point of the glass will the coating dissolve into it or otherwise react with it?
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2answers
101 views

In Lassaigne's test, the organic compound is first fused with Sodium Metal instead of any other Group 1 Metal, Why is this so?

I know that Sodium has high polarising power than potassium so it can convert the respective functional groups more readily than Potassium and both Lithium and Sodium salts are soluble in water. This ...
2
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1answer
43 views

What are the products in the reaction of sulphuric acid and Group 2 metals?

When group 2 metals, says magnesium, is reacted with nitric acid, oxide of nitrogen is produced beside hydrogen gas. The standard electrode potential values agree with this: $$ \begin{align} \ce{Mg^...
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1answer
47 views

Determining the formula of tin(II) chloride hydrate [closed]

$\pu{1.20 g}$ of hydrated tin chloride decompose to form $\pu{1.01 g}$ of anhydrous tin chloride on heating. Calculate the value of $x$ given $$\ce{SnCl2.xH2O -> SnCl2 + x H2O}$$ I done it ...
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2answers
34 views

Unit analysis for neutralization reaction

What volume of $\pu{0.500 mol L-1}$ $\ce{HCl}$ (in $\pu{mL}$) is required to neutralize $\pu{2.02 g}$ of solid $\ce{NaOH}$ pellets? So far I have tried regular unit analysis: 2.02 g NaOH * 1mol ...
2
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1answer
47 views

Determining the half-reaction equations for extraordinary redox reaction? [closed]

I have the following question stated in the science teacher exam: Write the half-reaction equations for the following reaction by using oxidation numbers: $$\ce{Na2SO3 + Na2CrO4 -> ...
6
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1answer
85 views

Are electronic descalers a scam?

It seems there are some electronic kits sold around nowadays by major retailers (e.g., Home Depot and Amazon) claimed to remove built-up scale from water pipes. But, do they actually work? If so, ...
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1answer
23 views

Strength of oxoacids of Chlorine [closed]

I have seen various different contradicting statements about oxoacids of chlorine regarding oxidising strength & reducing strength of these. I understand the trend for acidity that HClO4 is ...
0
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1answer
80 views

Half/fully filled orbital stability

Beryllium the configuration is [He] 2s2 i.e fully filled but still quite reactive Also in neon [He]2p4 , neither half filled nor fully filled, still quite stable compound (As it forms compound with ...
2
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1answer
61 views

Why is $1s-1s$ orbital overlapping stronger than $2p_x-2p_x$ orbital overlapping?

Assume the x-axis to be the internuclear axis. Hence, both $1s-1s$ and $2p_x-2p_x$ will form $\sigma$ bonds. Also consider the fact that $p$ orbitals have more directional characteristics. Given the ...
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1answer
104 views

Why nitrogen monoxide does not dimerise [duplicate]

This question has already been asked link Why doesn't nitrogen monoxide dimerize? but explination is not clear. I would like it to be explained in simple manner using molecular orbital diagram ...
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1answer
47 views

Why oxidation state decreases

oxides of group 1 elements are Li2O , Na2O2 , KO2 , RbO2 Oxygen’s oxidation state in each compound is -2 , -1 , -1/2 ,-1/2 respectively I.e oxide-> peroxide-> superoxide my question The oxidation ...
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1answer
35 views

What is the correlation between electronegativity and the sharing of electrons?

For example in a C-O bond, the electronegativity difference is 1.2. does this mean that the Oxygen has 1.2 of the shared electrons and Carbon 0.8 (or some other numbers)? Is there a specific equation ...
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0answers
137 views

Why is fluorine a oxidising agent?

Fluorine has very high charge/mass ratio as it is very small in size, its electron gain enthalpy is very high. Oxidizing agent pulls the electron cloud of the substance being oxidized towards itself, ...
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0answers
24 views

Why do heavier d block elements are more stable in higher oxidation states than lighter d block elements? [duplicate]

I read that it is because it is easier to ionise the elements as the electrons involved are those of d orbitals which have same degeneracy. First of all, i found it very vague. Secondly, what about ...