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.

Filter by
Sorted by
Tagged with
5 votes
0 answers
93 views

Is the formation of nitrogen dioxide spontaneous?

I was studying Thermodynamics from my Chemistry textbook (page 181-182, section 6.6 (a)). I have a question regarding the following text from my book. Now let us examine the following reactions: $$\...
user avatar
1 vote
1 answer
253 views

Atomic Radius of Manganese and Chromium

It is clearly a general trend that the atomic radii of the 3d elements in ascending order of atomic weight, leads to the following trend as in the graph below. But, it was pointed out to me that, Mn ...
user avatar
2 votes
2 answers
125 views

Reaction between sodium hydroxide and phosphorus trioxide

My chemistry textbook [1], chapter Periodic Properties of Elements, section p-Block elements — formation of oxides suggests that the reaction is $$\ce{P2O3 + 2 NaOH -> 2 NaHPO3},\tag{R1}$$ but ...
user avatar
6 votes
1 answer
365 views

Why does Samarium have such a large c-axis lattice constant? (>26 Å) Are there significantly larger lattice constants of the elements?

Figure 1.2 on page 12 of The Structure of Rare-earth Metal Surfaces linked below shows a repeating stack of hexagonal layers arranged as A B A B C B C A C... and several sources give the c-axis ...
user avatar
  • 6,280
0 votes
1 answer
33 views

Dominance of electronic factors in cupric ion

I know that Cu+ ( cuprous ) ion is less stable than Cu²+ ( cupric ) ion . There are some reasons explaining this by high hydration enthalpies and low ionization enthalpies . Even though , these ...
user avatar
0 votes
0 answers
61 views

Reaction rate of 2 H2 + O2 → 2 H2O

I am interested in the kinetics of the reactions: $$ \begin{align} \ce{2 H2 + O2 &-> H2O}\tag{R1}\\ \ce{2 CO + O2 &-> 2 CO2}\tag{R2}\\ \end{align} $$ I looked at the NIST website hoping ...
user avatar
-1 votes
1 answer
96 views

What is the product of the following reaction(different sources give different answers) [closed]

$$\ce{FeS +dil HNO3}$$ $$\ce{FeS +conc HNO3}$$ I got different answers to these reactions in different sources Source1 Jd lee: Source 2 Op Tandon: Can anyone please explain which is the correct one ...
user avatar
-1 votes
1 answer
48 views

Rate equation for the decomposition of hydrogen peroxide with iron(III) chloride as catalyst [duplicate]

I am trying to determine the activation energy of the decomposition of hydrogen peroxide with iron(III) chloride added as a catalyst. To do that, I need to find the rate constant, but I am not sure ...
user avatar
3 votes
0 answers
36 views

Permitted composition of lithium oxometallate in lithium-ion battery and its influence on ion transfer

The following scheme describes the overall reaction that takes place in a Li-ion battery: $$ \begin{align} \ce{Li_{$y$}C6 &-> $y$ Li+ + $y$ e- + C6} &\quad &\text{(anode)} \tag{R1}\\ \...
user avatar
6 votes
2 answers
261 views

Why, out of the main halogens, is bromine the most soluble in water?

Why, out of the main halogens, is bromine $(\ce{Br2})$ the most soluble in water? Why is there such a drastic decrease for iodine $(\ce{I2})?$ Here is a table from my inorganic chemistry textbook with ...
user avatar
2 votes
1 answer
97 views

Reaction of phosphorus pentoxide with perchloric acid

I've come across the reaction of $\ce{P4O10}$ with $\ce{HClO4}$ (perchloric acid) which gives the products as metaphosphoric acid and $\ce{Cl2O7}$ but I'm unable to understand how does perchloric acid ...
user avatar
2 votes
0 answers
134 views

Why doesn't XeF6 displace oxygen from water?

Consider the following reactions (unbalanced): $$ \begin{align} \ce{XeF2 + H2O &→ Xe + HF + O2} \tag{a} \\ \ce{XeF4 + H2O &→ XeO3 + Xe + O2 + HF} \tag{b} \\ \ce{XeF6 + H2O &→ XeO3 + HF} \...
user avatar
0 votes
2 answers
59 views

Atomic formula obtained by mixing given percentages of oxides

Calculate the atomic formula of a compound which is made by $93\,\%$ of $\ce{SnO2}$ and $7\,\%$ of $\ce{Sb2O5}$. The molar mass of $\ce{SnO2}$ is $\pu{150.71 g mol^-1}$ and the molar mass of $\ce{...
user avatar
9 votes
4 answers
1k views

Chemical formulas with non-integer coefficients [duplicate]

Let's consider the composition $\ce{Hg_{0.7}Cd_{0.3}Te}$ which appears in my data. As I remember from my chemical knowledge it's not possible having non-integers numbers as coefficients of elements. ...
user avatar
8 votes
0 answers
165 views

Why is octaoxygen diamagnetic?

I tried considering that according to LCAO-MO theory $\ce{O2}$ is paramagnetic, which is confirmed by experimental evidence. Since octaoxygen has the crystal structure in figure, I thought there is a ...
user avatar
  • 189
-1 votes
1 answer
99 views

Is boiling aqueous solution of copper(II) sulfate safe?

I want to create saturated coper(II) sulfate solution in order to grow crystals. Is boiling a solution of copper sulfate at home safe? Are there any risks? Is the vapour pure water?
user avatar
0 votes
0 answers
58 views

Molar conductivity

Among $\ce{H+, Li+, K+, Rb+, Cs+}$ in an aqueous medium at infinite dilution at 25 °C, which ions have more ionic molar conductivities than that of $\ce{Na+}$? I know that Molar conductivity is ...
user avatar
  • 115
3 votes
1 answer
169 views

Is sodium superoxide more abundant than sodium oxide?

Reference(NCERT book of India); My professor has taught me that $\ce{Na2O}$ and $\ce{Na2O2}$ are the most common oxides of sodium, but in my reference book it is written that they are $\ce{NaO2}$ and ...
user avatar
1 vote
1 answer
162 views

Reaction between concentrated sulfuric acid and sodium bromide

What are the products of the reaction between sodium bromide and concentrated sulfuric acid? I did the question like this: $$ \begin{align} \ce{2Br- &-> Br2 + 2e-} \tag{R1.1} \\ \ce{SO4^2- 4H+ ...
user avatar
4 votes
1 answer
199 views

Ellingham diagram/graph for tungsten

I've recently come across one of the methods to form tungsten carbide($\ce{WC}$) from wolframite ($\ce{(Fe,Mn)WO4}$) by using carbothermic reduction which was supposedly one of the first methods for ...
user avatar
0 votes
1 answer
253 views

How do I calculate the maximum temperature of an exothermic NaOH reaction in water?

As the title suggests, let's say I want to make a 1 L 14M NaOH solution. For this I'd need: (14 mol/ L) x 1 L x (39.99 g / mol ) = 559.86 g NaOH(s) {solute} ~1 L H2O (approx) {solvent} The ...
user avatar
-1 votes
1 answer
118 views

Reaction of silicon dioxide with sodium hydroxide

I recently learnt about this equation but I would like to know how NaOH reacts with the 3d structure of SiO2 and gives Na2SiO3 and H2O. Can anyone explain with simple diagram how NaOH forms new bond ...
user avatar
0 votes
0 answers
40 views

Confusion in finding Effective Atomic Number of a complex

In finding EAN (Effective Atomic Number) of metal in complexes, I came over one compound: $\ce{[(CO)2RhH2Rh(CO)3 Cl]^+}$ Here the hydrogen are shown as bridging atoms and we are supposed to calculate ...
user avatar
  • 425
1 vote
1 answer
69 views

Why is sodium bisulfate acidic? [closed]

So, as I know, the rule says that if you get a salt from strong acid and strong base it should be neutral. In this situation with sodium bisulfate and also trisodium phosphate we get an acid salt, ...
user avatar
4 votes
0 answers
76 views

Why is there a large increase in volume when an alkali metal is dissolved in liquid ammonia?

My teacher said unexplainedly that when alkali metals dissolves in liquid ammonia, there is a large increase in the volume. I found a paper that confirms this fact [1]: In the course of recent ...
user avatar
  • 154
0 votes
1 answer
67 views

Why is reaction of Li less vigorous than that of Na although the former has a more negative SRP value?

My textbooks says: It may be noted that although lithium has most negative E0 value (Table 10.1), its reaction with water is less vigorous than that of sodium which has the least negative E0 value ...
user avatar
  • 3
0 votes
1 answer
85 views

stability of Cu(II), Cu(I) and Zn(II) ion

I would like to ask about the stability of $\ce{Cu^{2+}}$ and $\ce{Cu^{+}}$ and also $\ce{Cu^{2+}}$. $\ce{Cu^{2+}}$ has a configuration of $(3\mathrm{d})^9$ but $\ce{Cu^{+}}$ has a configuration of $(...
user avatar
0 votes
0 answers
38 views

Calcium Hydroxide, 98%, extra pure + DI resulted in a bright pink solution

When combined with DI, my 98% calcium hydroxide resulted in a pink solution. I am trying to make limewater for a class demonstration and have only ever seen limewater as a colourless solution. Anyone ...
user avatar
0 votes
0 answers
50 views

What makes ammonia to dissociate when volume is increased?

What makes ammonia dissociate to $\ce{N2}$ and $\ce{H2}$ when the volume is increased (pressure is reduced)? I understand how pressure affects equilibrium. What happens after the $\ce{NH3}$ is being ...
user avatar
  • 1
-2 votes
2 answers
72 views

Question regarding chain silicates

In my textbook, $\ce{Li2SiO3}$ has been given as an example of single chain silicate. It is represented by general formula $\ce{(SiO3)^{2-}_n}$. In $\ce{Li2SiO3}$, since there is only one $\ce{SiO3^2-}...
user avatar
0 votes
0 answers
58 views

Can titanium dioxide oxidize sulfite

Suppose that there is 100mL of a 1M SO2 solution in water. If 1g of TiO2 photocatalyst is dispersed throughout the solution and UV light is shined on it, would it cause significant amounts of the ...
user avatar
-4 votes
1 answer
100 views

Bonding in boron icosahedra [closed]

How do boron atoms make five bonds with other boron atoms even if the electron configuration of unbound boron atoms is [He]2s²2p¹, i.e. there is an insufficient number of outer electrons? Are the ...
user avatar
1 vote
0 answers
71 views

How to promote oxidation of copper(I) chloride to copper(II) chloride with oxygen in solution?

I recently discovered that copper(I) chloride in hydrochloric acid can react at about 80 °C with bubbled-in oxygen gas and oxidize into copper(II) chloride. I found almost no documentation on the web, ...
user avatar
1 vote
0 answers
45 views

Can we split solid ionic compounds into their constituent ions when writing an ionic equation?

The equation for the reaction between magnesium and copper(II) oxide is: $$\ce{Mg + CuO -> MgO + Cu}$$ Here, we can write the net ionic equation as: $$\ce{Mg + Cu^{2+} -> Mg^{2+} + Cu}$$ The $\...
user avatar
5 votes
4 answers
799 views

Given a CIF (crystallographic interchange format) file (and thus cartesian atomic coordinates), how can you find the bonds between atoms?

Applications like Vesta show bonds when viewing a CIF file; how could one algorithmically find all bond pairs? Here is an example CIF file: ...
user avatar
1 vote
1 answer
95 views

How to remove graphite substrate of boron carbide coating?

I have a boron carbide coating (the thickness is either 90 microns or 220 microns) on a graphite substrate (the thickness is 0.5 inch - about 13 mm, the other dimensions are 2x2 inch$^2$ - about 5x5 ...
user avatar
  • 119
5 votes
0 answers
41 views

Aren't electrophilic addition reactions of alkenes also nucleophilic addition reactions?

And if they are nucleophilic substitution reactions as well, then why do we not call them "electrophilic and nucleophilic addition reactions of alkenes"? Consider the reaction between ethene ...
user avatar
0 votes
1 answer
123 views

Impurities in household baking soda

For a long time, I have been using store bought baking soda (with sodium bicarbonate as the sole ingredient listed) as the sodium bicarbonate in my (qualitative) home experiments, but recently I ...
user avatar
  • 47
1 vote
4 answers
120 views

Why are strong oxidizing agents "incompatible" with ferrocyanide according to SDS?

As I've mentioned in this question, I am making $\ce{Na3Fe(CN)6}$ from $\ce{Na4Fe(CN)6}$ by oxidizing the ferrocyanide using sodium permanganate. The SDS of sodium ferrocyanide as well as potassium ...
user avatar
  • 59
2 votes
0 answers
92 views

AlCl3 and water

While reading Clayden's (et al) Organic Chemistry I stumbled upon a reaction on page 120 that I just fail to wrap my brain around. It describes a reaction of AlCl3 with water and states that, quote, &...
user avatar
3 votes
1 answer
109 views

Synthesis of sodium ferricyanide

I need to synthesize sodium ferricyanide, $\ce{Na3Fe(CN)6}$, for some benchtop experiments where I don't want any potassium ions in solution. The way I am doing that right now is oxidizing $\ce{Na4Fe(...
user avatar
  • 59
-3 votes
1 answer
89 views

Calculation of hypochlorite concentration from active chlorine

So in the lab we got sodium hypochlorite solution. The concentration is in active chlorine (13%) on the label. How do I calculate it to concentration of hypochlorite? I need certain amount of ...
user avatar
1 vote
0 answers
33 views

How to calculate pH resulting from dissolving a salt in water? [closed]

The main question is how to calculate the changes in pH after dissolving a salt in water. Suppose we dissolve 1 gram of magnesium carbonate (MgCO3) in 1 liter of Water. This will result in (...
user avatar
  • 11
-2 votes
2 answers
68 views

How can boric acid forms pyroboric acid if it is a monobasic acid?

Pyro acids are prepared by removing one water molecule from two molecules of oxyacid. $\ce{H3BO3}$ has only one acidic hydrogen so two of that molecule will have two acidic hydrogens. If we remove ...
user avatar
-3 votes
1 answer
55 views

Equation describing electrons in a atom/ion [closed]

When not only 1 electron exist in the atom/ion the electrons of the atom/ion interact with each other and with the nucleus. Do we solve this equations: or this equation? x is the position of a ...
user avatar
9 votes
2 answers
576 views

Why are there two infrared vibrational frequencies for the terminal CO ligands of Fe2(CO)9?

I am struggling to rationalise why there are two infrared vibrational frequencies ($\pu{2082 cm^-1}$ and $\pu{2019 cm^-1}$) for the stretching of the terminal $\ce{CO}$ ligands of $\ce{Fe2(CO)9}$. ...
user avatar
  • 91
4 votes
1 answer
135 views

Can the environment of a molecule affect its HOMO LUMO gap?

For example, if a particular molecule is inside a particular protein, can its absorption maxima change with respect to the isolated molecule? Also, within the same protein, can the molecule's HOMO-...
user avatar
-5 votes
1 answer
529 views

Which ion is more stable in aqueous solution; Co2+, or Co3+? [closed]

We know $\ce{Co^{3+}}$ is more stable in complex compounds than $\ce{Co^{2+}}$ is in the same. I am told that for aqueous solution, $\ce{Co^{2+}}$ is more stable than $\ce{Co^{3+}}$, however in ...
user avatar
2 votes
3 answers
163 views

Do molecules containing enough oxygen to burn themselves exist?

Is there a molecule with enough oxygen in it (for example, something like $\ce{HCOOOH}$) such that it can undergo complete combustion without requiring any additional oxygen? For example the above ...
user avatar
  • 171
9 votes
1 answer
247 views

How does cyclopentadienyl anion act as reducing agent?

I am a second year university student, so I'm afraid my chemistry isn't great. I am looking for an explanation of how the $\ce{Cp-}$ anion acts as a reducing agent. To contextualise - in a simple ...
user avatar

1 2
3
4 5
91