Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

-1
votes
0answers
26 views

Why does the concentration of Nitric Acid affect the product of an oxidation reaction? [duplicate]

In my book it is written that when dilute Nitric acid is reacted with Copper it forms Nitrogen Monoxide but when it reacts with concentrated Nitric acid it forms Nitrogen dioxide what is the reason ...
-1
votes
0answers
31 views

pπ-dπ bonding in SO2X2

Sulfuryl Chloride and Sulfuryl Fluoride have π-bonds between S and O atoms. I have read that SO2Cl2 has one pπ-dπ and one pπ-pπ bond, but can't verify it anywhere on the net. Is the above statement a ...
0
votes
0answers
31 views

Separation of carbon mono-oxide and hydrogen

What is a shift converter in chemistry? For example in "inorganic chemistry by JD lee" while discussing the ways in which CO and $H_2$ can be separated the book stated that water gas(that is the ...
-2
votes
0answers
32 views

Hybridisation state dsp3 but with square pyramidal shape?

When describing bonding in molecules with square pyramidal shape, like $\ce{BrF_5}$, the hybridisation scheme which is normally used is the $\ce{sp^3d^2}$ hybridisation. However, there is also another ...
-1
votes
0answers
15 views

Qualitative Inorganic Analysis - Cation test

I remember learning in my tenth grade about Cation test using Sodium Hydroxide and Ammonia Solution (I mean these tests http://spmchemistry.blog.onlinetuition.com.my/2012/08/identifying-cations-test-...
-1
votes
0answers
46 views

Can PCl5 act as an reducing agent?

I know that in PCl5 phosphorus is in +5 state and can't go in any further state. But in a book of my coaching class they state that it can act as an reducing agent through chlorine. Is this statement ...
1
vote
0answers
86 views

Do XeF2 and XeF4 react with SiO2?

A question came in my test asking which of the compounds are not stored in glass. The answers were $\ce {HF, XeF6, XeF4, XeF2}$. I know about $\ce {HF} $ and $\ce {XeF6} $ but not about the other two. ...
1
vote
1answer
44 views

Can ZnO act as a reducing agent for noble metals like Pd?

Palladium ions (e.g., $\ce{Pd^2+}$) can be reduced to $\ce{Pd}$ by more reactive metals such as zinc. Metal oxides such as $\ce{ZnO}$ are very stable but can its atoms in the oxide structure still be ...
-1
votes
0answers
32 views

Production of alkyl halides [duplicate]

One of the famous reactions of production of alkyl halides is the reaction of hydrogen halide with alcohols. The synthesis of the alkyl halide is different depending upon the halogens. I was taught ...
-1
votes
1answer
21 views

How to identify whether a metal carbonate is basic or not? [closed]

Magnesium carbonate is basic, but why isn't lithium carbonate also basic? And how does one determine whether a carbonate is basic or not?
-1
votes
1answer
39 views

Why is the combustion of Nitrogen endothermic? [closed]

Other combustion reactions are exothermic but this combustion reaction endothermic. Why ? Please explain..
0
votes
0answers
21 views

Half-reaction for ammonium nitrate comproportionation into dinitrogen monoxide.

Ammonium nitrate comproportionates into dinitrogen monoxide in the following reaction: $\ce{NH4+ (aq) + NO3- (aq) -> N2O(g) + 2H2O (l)}$ I attempted to write the half-reactions by calculating ...
1
vote
0answers
31 views

How to understand MO diagrams for cationic octahedral transition metal complexes

I am having problems understanding the construction of MO diagrams in octahedral transition metal complexes within ligand field theory (LFT) when the metal center is asumed as an cation: I am ...
-1
votes
0answers
36 views

Why is the structure of ozone not an equilateral triangle? [duplicate]

In the structure of ozone, there is a double bond and a coordinate bond, which causes the accumulation of positive charge on the central oxygen due to sharing of the lone pair. Wouldn't a triangular ...
3
votes
0answers
46 views

What is symmetry of p- and d-orbitals in ${D_{3h}}$?

To identify IR and Raman active, symmetry of p- and d-orbitals are used. If we start since making ${D_{3h}}$ character table, how to match between symmetry of p- and d-orbitals and Mulliken symbol? ...
-1
votes
1answer
18 views

Why is it important in the iodine clock reaction that there is only a small quantity of sodium thiosulfate?

These are 2 questions . Why is thiosulphate needed ? And why In small quantities ? I know that the thiosulphate reacts with the I2 to form I ions Why is that important though ?
3
votes
0answers
39 views

Why does standard reduction potential get multiplied by the change in oxidation state and not by the number of electrons transferred?

The whole basis of Frost diagrams is to have a graphical representation of the Gibbs free energy of formation ($\Delta{G}_{f}$) of different oxidation states of an element using the proportional ...
3
votes
1answer
39 views

Calculating the standard reduction potential for the oxidation of water

I was working with Latimer and Frost diagrams for oxygen when I came across what seems to me a contradiction. From the Latimer diagram for oxygen below, we know the standard reduction potential for ...
-3
votes
1answer
59 views

Reason for shorter bond between sulphur and oxygen [duplicate]

I resently came across this sentence in my textbook “the bonds between sulphur and oxygen in oxides of sulphur (SO2 and SO3 ) are much shorter than might be expected for a single bond“ I couldn’t find ...
-1
votes
1answer
26 views

What is PPM in terms of air concentration?

When they say the $\ce{CO2}$ concentration is $\pu{350 ppm}$ what does this actually mean? Does this mean that if we took a sample of air say $\pu{1 m3}$ then $\pu{350 mg}$ of that cubic meter would ...
0
votes
1answer
49 views

Can the oxidation of hydrogen peroxide be reversed? [closed]

Hydrogen peroxide is said to be unstable, for it undergoes auto-oxidation on standing/heating: $$\ce{2H_2O_2 -> 2H_2O + O_2}$$ where $\Delta S=\pu{70.5 J {mol}^{-1}K^{-1}}$ and $\Delta H^{\Theta} ...
0
votes
2answers
96 views

Is fluorine sp3 hybridized in BF3

Since BF3 has the shape of tetrahedral, and in the provided solution, Boron is sp2, why is Fluorine sp3 hybridized?
0
votes
0answers
31 views

What is DNA Concentration?

Watching The "Making a Murderer" documentary an analytical chemist claimed they found .14 nano grams per microliter on a car key. What exactly do they mean by stating it this way? Why wouldn't they ...
0
votes
1answer
21 views

What does 'a' stand for in 'a-C' according to research paper lingo?

I came across this paper but I cannot figure out what is a-C as it is not defined. The C here is obviously Carbon. Regarding 'a' prefix My best guess is that it stands for amorphous. Is this correct?
5
votes
1answer
98 views
+50

Using thermodynamics to predict the acid-base character of fluoride ion in water

I was working through the end-of-chapter exercises of the acid-base chapter in Shriver's Inorganic Chemistry when I came across the following problem: 4.7. The effective proton affinity $\ce{A^{'}_{...
0
votes
1answer
51 views

Will gamma radiation cause “thermal” decomposition of sodium bicarbonate?

I am conducting research for a new drug that contains powdered sodium bicarbonate, and the drug will need to be sterilized after placement into it's container/closure system. Typically, this is ...
1
vote
1answer
37 views

HNO3 + F2 reaction

HNO3 is a strong oxidising agent and as well as F2 . What will be the reaction when pure F2 gas is bubbled through 100% pure HNO3. I Google it but all suggests different reaction.
0
votes
0answers
32 views

Lead's affinity for oxygen in the cupellation refining process

My inorganic textbook says Cupellation is a process, where crude gold is taken in a small bowl called cupell and melted in the presence of air. Due to high oxygen affinity of Pb, it is converted to ...
-1
votes
1answer
18 views

Dilution of Concentrated TiCl4 using deionized water [closed]

How can we dilute conc TiCl4 (>99%) to 20 % w/w, using only DI water?
1
vote
0answers
32 views

Dichlorine monoxide molecular geometry

I need to predict the geometry of Dichlorine monoxide, using the main link theory: Lewis model, VSEPR and hybridization of molecular orbitals. First, the Lewis structure is a graphical representation ...
-1
votes
1answer
43 views

Why do large cations stabilise large anions and small cations stabilise small anions? [closed]

I see this trend from enthalpy change of decomposition data, though I struggle to find a decent explanation for why.
-1
votes
0answers
26 views

What is a major product of this trans effect reaction?

In the association substitution of ligand into a complex, there is trans effect which describes where incoming ligand replaces leaving ligand. Most of examples in textbooks showed only 2 steps of ...
-1
votes
1answer
29 views

Formulation and Nomenclature of Boric and Phosphoric Acids

Why are boric and phosphoric acids are formulated as: H3BO3 H3PO4 Instead of: HBO2 HPO3 Because the acids end with the -ic suffix, the valences of the elements between the hydrogens and oxygens ...
-1
votes
1answer
26 views

Quantity of base needed to neutralise litre of 36% HCl?

Sorry for asking a basic chemistry question. I last did this kind of chemistry at school about 30 years ago and I don't have confidence that I'd get it right from first principles :) Short version: ...
-2
votes
1answer
87 views

Polyprotic acid - How does one calculate the CONCENTRATIONS of ALL species present in a solution when you start with 0.3M NaH2PO4? [duplicate]

Can anyone give me a push in the right direction, how do I calculate the concentration of all species present in a solution with 0.3M NaH2PO4. So the concentration of H3PO4, H2PO4 -, HPO4 2-, PO4 3- ...
4
votes
1answer
53 views

Second order Jahn-Teller effect for d0 complexes

I was wondering why the second order Jahn-Teller effect is also said to happen for many d0-systems? It makes sense to me that due to relativistic effects and the stabilization of the s-Orbital and ...
-1
votes
1answer
25 views

Valence Electrons of Molecules

Why do we say that hydrogen has 1 valence electron? Hydrogen (H2) is a molecule so how does this make sense?
4
votes
1answer
73 views

Optical Isomerism in Coordination Compounds of type MA₂B₂(CC)

I was asked the following question: How many optical isomers are there for $\ce{[Cr(NH3)2Cl2(en)]^+}$ ? First of all I figured out the following four geometrical isomers of the above complex: Out ...
-1
votes
1answer
40 views

Metals - Solids or Types of Atoms? [closed]

Are metals lattices of metal ions bound to delocalised electrons or are metals types of atoms? For instance we can say “metals are electronegative” and we can say “metals are conductors of electricity”...
0
votes
1answer
20 views

Maximum metal-metal distance for antiferromagnetic coupling

Imagine a transition metal complex with multiple open-shell transition metal cations. If the metals are relatively close in distance, it is possible that antiferromagnetic coupling will occur between ...
0
votes
1answer
31 views

Substances - A Macroscopic Concept

Does the term “substance” refer to any sample of matter that is tangible? In other words is “substance” a macroscopic concept or can we also refer to individual particles such as atoms, molecules, etc....
-1
votes
1answer
40 views

Inorganic Chemistry

Which of the following is a covalent bond? 1.Al2O3 2.AlF3 3.AlCl3 4.Al2(SO4)3 The correct answer is AlCl3.But I have a confusion between option c and d.A/c Fajan's ...
15
votes
6answers
10k views

Why do we call O2 oxygen? [closed]

I have been taught that oxygen is a chemical element, in other words a certain type of atom that has 8 protons in its nucleus. So why is O2 called oxygen? It is not a type of atom but rather a ...
1
vote
2answers
107 views

Does carbon monoiodide (CI) exist?

Many of my students get chlorine $\ce{Cl}$, confused with carbon monoiodide $\ce{CI}$, despite my promises to use serif fonts whenever possible and to never give them carbon monoiodide in a question. ...
0
votes
1answer
38 views

Why are reactions with higher activation energy more sensitive to temperature?

In the above picture it is stated clearly, with an example, that the more the Ea of a rxn the more it's sensitive to temperature, and hence even a small change in temperature in a reaction with high ...
1
vote
1answer
30 views

Need help regarding exothermic and endothermic reactions

In my book it’s written that “A rise in temperature is given a positive sign. So the value of H is negative for an exothermic reaction. A fall in temperature is given a negative sign. So the value of ...
2
votes
1answer
52 views

Comparing the bond strength between a polar bond and non-polar bond

According to NCERT class 12 part 2, $\ce{ICl}$ has lesser bond enthalpy than $\ce{I2}$. I have read that non polar covalent bonds are weaker than polar covalent bonds as in polar covalent bonds ...
-1
votes
0answers
38 views

why is Cobalt(II) is a reducing agent while Nickel(III) is a oxidizing agent?

The Co(II) ion can be oxidized into Co(III) easily in the presence of strong field ligands around it. But Mn(III) which has the same d electron configuration $(d^7)$ isn't oxidized to Mn(IV). The ...
0
votes
1answer
32 views

Reactivity and its meaning

When we say that “potassium” is reactive, are we referring to a potassium atom or bulk potassium as in the solid metal? In other words does “potassium” refer to a type of atom or an agglomeration of ...
1
vote
2answers
110 views

Why the bond strength of HCl is more than HBr?

Most people say that it is because the 3p orbital of chlorine when overlapping with the s orbital of hydrogen covers more area than when 4p orbital of bromine overlaps with the s orbital of hydrogen ...