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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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Do all decomposition reactions involve heat? [closed]

When water decomposes into Hydrogen and Oxygen as in 2H2O—-> 2H2+O2 does this involve heat? Is it always implied that heat is involved in a decomposition reaction or does this just spontaneously occur?...
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1answer
2k views

What are the bubbles that evolve in the redox reaction of copper(II) chloride and aluminum?

When aluminum (foil) is placed in an aqueous solution of copper(II) chloride, the aluminum atoms lose electrons to the copper(II) ions and replace them to form aluminum chloride, and to free up ...
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0answers
29 views

Cr to Cr2o3 (not in powder form)

how do you obtain Cr2O3 from Cr (large pieces)? Is there any acids who could be used? I only know of heated (NH4)2Cr2O7 to get Cr2O3 but this result in powder. I'll appreciate any suggestions! ...
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2answers
3k views

Would sodium explode in salt water?

I’ve seen the video etc of sodium being put into freshwater and the reaction of flames/small explosion but I wonder if the same reaction would occur if conducted in salt water such as the ocean.
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1answer
5k views

Does iron(III) sulfate react with copper?

As my understanding, there should be an oxidation-reduction reaction: $$ \ce{2 Fe^3+ + Cu → 2Fe^2+ + Cu^2+} $$ However, I always see the process using $\ce{FeCl3}$ to etch copper, but I never ...
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0answers
26 views

Temperature increase in the reaction between magnesium and steam [on hold]

I want to approximate the temperature increase for a piece of magnesium reacting with steam $$\ce{Mg(s) + H2O (g) → MgO (s) + H2 (g)} \quad\Delta H = \pu{-360 kJ mol-1}$$ So, I've made a couple of ...
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0answers
18 views

Can h2o2 be decomposed by alcohol or is Noah + cao favourable? [on hold]

I have answered a question asking which of the products can decompose h2o2 I answered naoh + cao (one of the options given) But they said its wrong
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0answers
22 views

Is this true that the decay bones catch fire as the reacn. In the figure [on hold]

here I have given you the picture of reacn between calcium and phosphorus which forms Ca3P2. And this reacts with HoH to form phophine gas and this reacts with oxygen to have a fire I want to ask you ...
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1answer
27 views

Why is water instead of hydroxide ions used to balance oxygen atoms in redox half equations?

When balancing half equations of redox reactions, $\ce{H2O}$ is used to balance any oxygen atoms? For example, this half equation $$\ce{NO3- → NH4+}$$ is balanced into: $$\ce{NO3- + 8 e- + 10 H+ → ...
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0answers
18 views

Contaminant aluminium(III) compounds in acidic soil [on hold]

I recently looked for aluminum source/contamination that migrates to agriculture soil. The toxic form of $\ce{Al}$ to plants is $\ce{Al^3+}$. Are there any of $\ce{Al}$-containing compounds (e.g. $\ce{...
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0answers
14 views

How does pyrosulfate compare to pyrophosphate?

That is, in terms of stability in aqueous solution and the energy released by the hydrolysis of the S-O-S bond compared with pyrophosphate hydrolysis. More specifically, could sulfates substitute ...
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1answer
43 views

Meaning of red heat

I have two reactions below. What is the difference between red heat and normal heat? Is it related to iron as a catalyst when it is red hot?
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2answers
5k views

Can magnetic fields affect a chemical reaction?

This question was asked recently in an interview and I just said that "Yeah, like if the reaction involves ions or paramagnetic species". But the interviewer went on and asked me to elaborate on HOW ...
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0answers
14 views

Solubility of substances in HF [closed]

Across my chem course, I noticed that HF does not dissolve several ionic and covalent compounds. What sort of compounds are soluble in HF? Or do no compounds dissolve in it?
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1answer
5k views

Is carbon dioxide more acidic than carbon monoxide?

Which of the given compounds is most acidic? $\ce{CO}$ or $\ce{CO2}$ ? How do I solve this question, and how do I explain it? I took the oxidation state of carbon in both. The oxidation state in $\...
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2answers
688 views

Does liquid ammonia react with hydrogen gas?

This may seem like a basic question to educated chemists, but I failed to get this answer on Internet searches. I keep getting more complicated stuff like the Haber process which is not relevant. At ...
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0answers
28 views

Solubility of copper(I) iodide in potassium iodide solution

Calculate the solubility of $\ce{CuI}$ in a $\pu{1.0e-4 M}$ $\ce{KI}$ solution, knowing that $K_\mathrm{sp}(\ce{CuI})=\pu{1.1e-12}$ and $K_\mathrm{s2}$ of the following reaction is $\pu{7.9e4}$. ...
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0answers
4k views

Why do NaNO3 + Al + NaOH yield ammonia?

From Russian test problem 4301: $$\ce{3NaNO3 + 8Al + 5NaOH + 18H2O -> 8Na[Al(OH)4] + 3NH3(g)}$$ How does ammonia evolve here? Is it that we get hydrogen gas evolving in the reaction between Al ...
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0answers
19 views

Reactions in chemistry [closed]

What would be observed if copper (11) sulphate solution was treated with potassium hydrogencarbonate solution ? Plus the equations involved.
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0answers
26 views

Copper Mirror Reaction

I would like to create a copper mirror on a plate of sandblasted glass. I know that a reaction exists: $$\ce{CuSO4 + N2H2 -> Cu + N2 + H2SO4}$$ I know that such a plate of copper is very weak. ...
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4answers
15k views

Difference between electropositivity and electronegativity

Sodium is more electro positive than hydrogen although they are in a same group. Why is the electronegative value of hydrogen greater than sodium (metal)?
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2answers
56 views

Is there a piece of software that can help me see the (hkl) planes in a crystal lattice?

I am doing research with calcium carbonate structures. I need a way in which I can familiarize myself with the lattice structure of calcium carbonate polymorphs, especially calcite. I really struggle ...
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0answers
20 views

How Can I make Make 0.1M Mercury nitrate solution? [on hold]

I dissolved 14 grams of Mercury nitrate dihydrate in 200 ml water and diluted to 250 ml. the solution is cloudy and seems that is not dissolved. any suggestions?
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2answers
32 views

How Can I Induce Corrosion Electrochemically?

I'm very interested in measuring corrosion in metal alloys, particularly in salt solutions. I understand metals corrode over time, however, I was wondering if it's possible to electrochemically "speed ...
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0answers
21 views

Buffer Capacity Equation

Whilst doing buffer capacity, my lecturer presented us with the following equation for buffer capacity: $${log(\frac{[salt] + x}{[acid] - x})} = 1$$ A task set by the lecturer is to rearrange the ...
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1answer
68 views

Lewis acids as ligands

Usually Lewis bases as my textbook says: 2.3 Ligands The ligands are the ions or molecules bound to the central atom/ion in the coordination entity. This is better visualized as the combination ...
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2answers
4k views

Is NaCl paramagnetic?

My teacher told yes that salt is paramagnetic and it is attracted by magnet slightly. But when I tried that at home it did not work.
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1answer
23 views

Finding magnesium aluminosilicate mineral with a sandwich structure [closed]

It is a mineral material with a sandwich structure, which contains $\ce{Mg^2+}$, $\ce{Al^3+}$ and many $\ce{Si-O}$ bonds.
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1answer
14 views

pH calculation and concentrations of all species present in a solution [closed]

When $\ce{NO2}$ is bubbled into water, it is completely converted to $\ce{HNO3}$ and $\ce{HNO2}$: $$\ce{NO2 + H2O -> HNO3 + HNO2}.$$ Calculate the $\mathrm{pH}$ and the concentrations of ...
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3answers
2k views

Why does calcium oxide react with sulfur dioxide?

Which of the following compounds reacts with calcium oxide, $\ce{CaO}$? (a) $\ce{K2O}$ (b) $\ce{Na2O}$ (c) $\ce{SO2}$ (d) $\ce{MgO}$ I thought that since sodium is higher in the reactivity ...
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2answers
146 views

Comparing ionic character of group 1 elements

According to Fajan's rule ionic character should increase down the group as the size of cation increase. So it must be $$\ce{LiH < NaH < KH < RbH < CsH}$$ However, the following two ...
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2answers
7k views

Why is the reaction of calcium oxide with sulfur dioxide to form calcium sulfite not a combination redox reaction?

I understand that a combination reaction is one where two substances combine to form a third substance, like with $$\ce{2Na + Cl2 -> 2NaCl}.$$ I do not understand why $$\ce{CaO + SO2 -> CaSO3}$...
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0answers
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what is the difference between oxidation state, charge and valency? [duplicate]

Is there any specific atom or compound or molecule possessing oxidation state different from charge and valency, so that we can clearly understand the difference between the three.
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1answer
32 views

Why does copper decrease in mass when reacted with silver nitrate?

I did a lab recently of the reaction of copper and silver nitrate. $$\ce{Cu(s) + 2AgNO_3(aq) -> Cu(NO_3)_2 + 2Ag(s)}$$ I measured the mass of copper before and after the single replacement ...
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0answers
30 views

What are the reaction products/by-products of a Tannerite explosion? [closed]

What are the products/by-products of the following reaction of "Tannerite"? I am looking to find out if any of the breakdown products pose an environmental risk. From Wikipedia on Tannerite: "Two ...
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2answers
47 views

Reason for shorter bond between sulphur and oxygen?

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 ...
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0answers
19 views

Confusion regarding contact process [duplicate]

I'm talking about this video, from where I'm referencing. My problem is with stage 3. From what I understand, we need $\ce{H2SO4}$ for mixing it with sulfur trioxide to produce oleum. From oleum ...
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0answers
21 views

My problem with Tollen's reagent [duplicate]

The formula of Tollen's reagent is $\ce{[Ag(NH3)2]+}$. What is the bond existing between the silver(I) atom and the ammonia groups? Because ammonia is stable, it doesn't need to gain or donate any ...
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1answer
156 views

Would molybdenyl chloride or tungstenyl chloride work as an alternative to chromyl chloride test?

(This is a follow up of this question) Chromyl chloride test is by far the best test to determine the presence of chloride ions in a salt because no analogous compounds are formed with fluorides, ...
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0answers
21 views

How can I precipitate metal ions from a solution? [closed]

I'm in Grade 12 Chemistry. We're doing some solubility, and one of the things we need to be able to do is explain a procedure where we separate metallic ions from a solution. So, for example, how can ...
7
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1answer
108 views

Why do we need to add hydrogen to amorphous silicon?

I was recently studying about Staebler-Wronski effect observed in amorphous silicon (a-Si). I realised it was due to imperfections in the lattice structure and breaking of Si-Si bond to Si-H bonds. ...
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1answer
60 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 ...
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1answer
35 views

What gas is released when heating sulphuric acid? [duplicate]

I'm doing a chemistry project and am really unsure about the gas released when heating sulphuric acid.
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1answer
589 views

Formula of Oxone

A problem in my book asked the commercial name of sodium peroxide. The answer given was 'Oxone'. Even the website https://www.911metallurgist.com/oxone/ mentions oxone as sodium peroxide. However, ...
4
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1answer
54 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 ...
2
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1answer
236 views

Distinguishing Brown Ring Test for Nitrates and Nitrites

My question is how will one detect the presence of nitrates by brown ring test when nitrites are also present in the solution? Brown Ring Test for Nitrite $\ce{NO_2^- + H+ -> HNO2}$ $\ce{...
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4answers
853 views

Ionic compound having highest solubility in water

Which ionic compound has highest solubility in water? I can find CsBr having highest solubility with 1230 g/L at 25 °C. Note: compounds like ethanol are soluble to any extent in water, but they are ...
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0answers
20 views

How to get rid of calcium carbonate and other salts formed by calcium hydroxide in air?

My basic question comes from the idea that in olden days people used lime to paint houses, so after it is dried out it becomes white paint which sticks to the walls. So, how to get rid of it? The ...