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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Solubility of Calcium [on hold]

The solubility of CaF(2) in a given temperature is : Ks= 3,2 . 10[-11] How many milligrams CaF(2) can be solved in 100 ml by this temperature.
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1answer
19 views

Dissociation HCL in aqueous solution

My question is regarding HCl. In my book it states that HCl(aq) -----> H+(aq) + Cl-(aq). I understand that when added in water the H leaves its electron to the Cl atom forming the Cl- and the H ...
-3
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0answers
23 views

Memorizing inorganic equations [on hold]

I couldn't figure out an efficient way of recalling inorganic balanced chemical equations. When it comes to an exam, I feel that I always tend to write the half ionic equations and get the balanced ...
0
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0answers
10 views

Why are these materials like gallium arsenide, gallium phosphide, aluminium gallium arsenide etc used in Light Emitting diodes?

Indium gallium nitride (InGaN): blue, green and ultraviolet high-brightness LEDs Aluminum gallium indium phosphide (AlGaInP): yellow, orange and red high-brightness LEDs Aluminum gallium arsenide (...
1
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0answers
52 views

Sulfuric acid from elemental sulfur and hydrogen peroxide

Will this reaction proceed under standard conditions? I don't really care if it is quite slow, as long as it takes less than a month to finish: $$\ce{S8(s) + 24 H2O2(aq) -> 8 H2SO4(aq) + 16 H2O(l)}...
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61 views

Molecular orbital theory configuration question

Recently while studying my high school chemistry textbook I came to know that according to molecular orbital theory, the energy of $\sigma 2p_z$ is actually greater than the energy of $\pi 2p_x$ and $\...
0
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0answers
44 views

How does MOT explain the hyper-valency in a compound?

I know what hypervalency is within a compound, but I am confused on how MOT explains this, in particular for the $\ce{PF_5}$ compound. Would someone please be able to explain this to me?
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1answer
49 views

Hydrogen sulfide and sodium carbonate reaction

What is formed in the reaction between hydrogen sulfide and aqueous sodium carbonate? My guesses are sodium sulfite and/or sodium hydrogen sulfite. However, the equations don't seem to balance ...
3
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2answers
61 views

Lanthanide property exceptions

Why do Europium and Ytterbium have lower densities than expected in comparison to other lanthanides? I know it has something to do with the fact they have half-full and full f-shells, but how exactly ...
6
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1answer
76 views
+50

Sodium permanganate from manganese dioxide and sodium hypochlorite

This page states that sodium permanganate can be formed by the reaction of manganese dioxide with sodium hypochlorite and sodium hydroxide: $$\ce{2 MnO2 + 3 NaClO + 2 NaOH -> 2 NaMnO4 + 3 NaCl + ...
2
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1answer
47 views

Alkalide compounds

I have read much more about metallic hydrides but I am totally confused about "inverse alkali hydrides" or "hydrogen alkalides" while reading refer to this. What are these compounds and how do they ...
5
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3answers
231 views

Ring compounds of non-carbon atoms [closed]

Are there compounds that are rings of non-carbon atoms, say a ring of six oxygen atoms, or 5-6 nitrogen atoms with attached hydrogens? Or are these too unstable to exist for long (if at all), like ...
0
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0answers
33 views

If pure silicon and water are combined and then subjected to radiolysis from Gamma radiation, what will the product be

I asked this and I was told that The radiation would probably rip bonds apart indiscriminately, making hydroxyl radicals, hydrogen atoms and a large concentration of crystal defects in the silicon....
3
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1answer
48 views

Is it safe to use lab-grade calcium nitrate as a fertilizer?

I want to use lab-grade calcium nitrate in my hydroponic system (as a fertilizer) to grow lettuce, is it safe?
4
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1answer
45 views

Dissolving limestone in HCl and then neutralising the solution with NaOH

$15.0~\mathrm{mL}$ of $1.4~\mathrm{M}\ \ce{HCl}$ was mixed with $1.00~\mathrm{g}$ of limestone (impure $\ce{CaCO3}$) until all the solid had dissolved. The solution was then transferred to a conical ...
0
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0answers
42 views

How is ideal gas law derived from all other laws (Boyle's, Charles', and Avogadro's)?

My book uses $V=\dfrac{b}{P}$ (Boyle's), $V=cT$ (Charles's), and $V=an$ (Avogadro's) to derive $V=\dfrac{nRT}{P}$. I understand this mathematical derivation. My question is: Each law has assumptions, ...
0
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1answer
40 views

How to find out unpaired electron in S2 molecule?

Theoretically electronic configuration and number of unpaired electron can be found out by using molecular orbital theory. But, practically I have seen only up to 20. For example, for Ne2 But for S2 (...
4
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1answer
40 views

What happens when potassium iodide is added to a copper (II) salt?

$$\ce{Cu^2+ + KI -> ??}$$ I thought of this reaction: $$\ce{Cu^2+ + 2KI -> CuI2 + 2K+}$$ But since $\ce{CuI2}$ doesn't exist, the $\ce{I-}$ ions must reduce $\ce{Cu^2+}$ to $\ce{CuI}$ and ...
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1answer
36 views

how does incomplete combustion of methane produce soot?

Ususally the incomplete combustion is formed this way: hydrocarbon + oxygen-> carbon + carbon monoxide + water. what about methane?
9
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1answer
184 views

Reaction of Iron(III) with hydroxide ion

The observations: 1) Treatment of 1 mL of 0.05 M $\ce{Fe(NH4)SO4}$ solution with excess 1 M $\ce{NaOH}$ results in the formation of a rust-colored red-brown iron-based solution with many suspended ...
1
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0answers
16 views

Nomenclature of salts of oxyanions [duplicate]

I want to know what is the way to determine a compound's composition by just seeing the name. For example, if I see the name "copper (II) sulfate" How would I go about deducing that its formula is ...
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26 views

Finding Oxidation numbers

Can someone tell me the concept for finding oxidation numbers? For example, NF3 nitrogen trifluoride how would one find the oxidation numbers for nitrogen and fluoride in that molecule ? I know it ...
0
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1answer
43 views

Is aluminum nitrate a polyatomic?

In my book it talks about aluminum nitrate and copper (II) perchlorate. It is stated that: "In the chemical formula for aluminum nitrate and copper perchlorate, parenthesis followed by the ...
1
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2answers
56 views

Why the products of combustion of Cu2S are Cu2O and SO2?

$$\ce{Cu2S + 2 O2 -> 2 CuO + SO2}$$ Why are not these oxides $\ce{Cu2O}$, $\ce{SO}$ or $\ce{SO3}$? Is it connected to the stability of these molecules?
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1answer
43 views

How to determine the percentage of iron(II) and iron(III) in a solution?

Outline a plan of an experiment to determine the percentage of iron present as iron(III) in a solution containing $\ce{Fe^3+(aq)}$ and $\ce{Fe^2+(aq)}$ ions. You are provided with zinc, a standard ...
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1answer
61 views

How many resonating structures of Carbon Monoxide are there?

Anywhere I look, I get 3 resonating structures for CO molecule, like in this answer. However, according to the rules stated for drawing resonating structures in this site, I wonder why there can't be ...
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1answer
29 views

Production of sulfuric acid using sulfur dioxide

Is it possible to create sulfuric acid using sulfur dioxide directly dissolved in water? Usually, people oxidize the $\ce{SO2}$ to sulfur trioxide ($\ce{SO3}$) first. If this is possible, why is it ...
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1answer
83 views

Pi-acceptor Ligands

Which of the following are pi acceptor ligands? $\ce{PR3}$ $\ce{Cl-}$ $\ce{NH3}$ $\ce{H-}$ I know that $\ce{PR3}$ is a pi-acceptor, and that $\ce{Cl-}$ is a pi-donor ligand from my lectures. I am ...
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1answer
118 views

How does chromium(III) react to form chromium(VI) with hydrogen peroxide?

$$\ce{2Cr(OH)3 + 4NaOH + 3H2O2 -> 2Na2CrO4 + 8H2O}$$ How does this reaction occur? We suddenly get sodium chromate in the place of chromium hydroxide. I can't understand it. We mix two hydroxides ...
0
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0answers
20 views

What hinders Monoclinic crystal system from having face centered variation and body centred variation?

Base centered monoclinic cubic cells exists.I think that we can just place some lattice points at the center of other faces to get a Face-Centered structure. But, Two monoclinic Bravais lattices ...
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0answers
16 views

Covalent bond and ions? [duplicate]

Are atoms in a covalent bond ions? For example water, does oxygen become the 0 2- anion or is this not correct to say since a covalent bond refers to the sharing on electrons? Im assuming atoms are ...
0
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0answers
28 views

When are Atoms Considered Ions [duplicate]

When are atoms considered ions? For example, $\ce{NaCl}$ is obviously an ionic compound as it made up of $\ce{Na+}$ and $\ce{Cl-}$. But in compounds which have covalent bonds such as water, is it ...
5
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2answers
186 views

Is sulfide ion a stronger base than hydroxide ion?

I received these three responses. They are all, except the last response, incorrect to varying degrees. I am, however, unsure about how to grade these responses because the question itself, in my ...
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1answer
46 views

What is the solution to Kauzmann's paradox?

Kauzmann's paradox is the paradox of what happens when a liquid is supercooled below the temperature at which the difference in entropy is zero.
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2answers
91 views

Why cesium considered most reactive element and not flourine? [closed]

Some people say Cesium is most reactive element. I thought it to be flourine as it is the element that reacts with almost all elements (except couple of inert gases). But cesium won't react many of ...
1
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1answer
30 views

How to measure saturated salinity and mineral levels for flaked sea salt?

I am a sea salt enthusiast looking to make the perfect flakey sea salt. I start with sea water and boil it down to a thick brine. Then with less heat I reduce the brine more slowly and inverted salt ...
2
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2answers
39 views

How to deduce crystal field splitting pattern

How do you determine the crystal field splitting pattern when given the structure of a complex? It's quite simple for structures like octahedral or tetrahedral, but I find that the reasoning behind ...
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1answer
14 views

Ionic charge factors [closed]

New to chemistry so forgive the fundamental question. What exactly determines the element's charge? Oxygen has 2- and hydrogen has 1+. Oxygen wants to receive 2 electrons to complete a shell when ...
-2
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1answer
60 views

Why do some acids have pH 8? [closed]

Is it necessary for an acid to have pH less than 7? If no, please elaborate with examples.
2
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2answers
50 views

Is the reaction of silver nitrate and copper endothermic or exothermic?

Is the following reaction endothermic or exothermic and why? $$\ce{2 AgNO3 + Cu -> Cu(NO3)2 + 2 Ag}$$ EDIT: I have a feeling that it is exothermic due to the fact that it is spontaneous and will ...
1
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0answers
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Theoretical Concentration (in PPM) of CO2 production after 1 minute

I recently conducted an experiment to determine ideal ratio of baking soda and citric acid that would produce the most amount of CO2 in water. We used 250ml flasks filled with 120ml water. The samples ...
1
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0answers
19 views

A material that could stick to almost anything? [closed]

I am looking for a material that could easily stick to any surface on impact and also detach easily. The Reason: I am making a machine for my first year Mechanical Engg. project that would throw ...
1
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1answer
56 views

Why does Cu(OH)2, which is generally insoluble due to low Ksp become soluble in excess of a base, such as NaOH?

Where does the "excess" criteria come into the picture? Also, can the equilibrium $$\ce{Cu^2+ + 6 H2O <=> [Cu(H2O)6]^2+}$$ participate in the solubility process in any case? So there are 2 ...
3
votes
1answer
97 views

Reaction between manganese oxide (IV) and sulfuric acid

$$\ce{2MnO_2 + 2H_2SO_4 \rightarrow 2MnSO_4 + O_2\uparrow + 2H_2O}$$ How does this reaction occur? We get the oxygen moiety of the manganese dioxide suddenly oxidized to gaseous oxygen, while the ...
13
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2answers
2k views

Why does KCl come in amber coloured bottles?

I remember from school that photosensitive chemicals are kept in amber coloured bottles. Is KCl photosensitive? I read up the impurities list on the bottle and it says that it may have bromides too? ...
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0answers
25 views

Quantitative analysis of Ni and Sr

I have a sample containing $\ce{K, Ni, Sr, NO3, Cl}$ and $\ce{I}$-ions. I need to determine the amount of $\ce{Ni}$ and $\ce{Sr}$-ions, and I would very much like some suggestions on how to do this.
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20 views

Books for students [duplicate]

Can any one please suggest me books for chemistry . a book for practicing basicbasic problems and advanced problems , it should contain some solved questions. The books should contain all the main ...
0
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1answer
21 views

Composition of desiccant

Most types of desiccation packages use silica gel, but are there any that use calcium oxide instead? Here's my reasoning: Calcium oxide absorbs water, forming calcium hydroxide. Adding a (used) ...
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0answers
5 views

Parameter effects on kinetics of esterification for bio-diesel production

I want to discuss the effect of parameters on the kinetics of esterification for bio-diesel production. In esterification process, temperature effect and molar ration are two important parameters. ...
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0answers
13 views

Experiment with magnesium-sulfur fertilizer

This fertilizer for is for soil and plant growth, and I was thinking of doing an experiment with it. The bag says it contains magnesium sulphate and water soluble sulphur trioxide. Is there anyway to ...