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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49 views

Spinel or salt?

In reaction of $\ce{Al2O3}$ with $\ce{NaOH}$, we get product written as "$\ce{NaAlO2}$", "$\ce{Na2Al2O4}$" or just "$\ce{Na2O.Al2O3}$". My question is what's the real structure of this compound? ...
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How to write reaction equations for the reaction of calcium and dilute nitric acid?

Normally metals react with dilute acid to form a salt and evolve hydrogen gas but I have read that hydrogen gas is not evolved when a metal reacts with nitric acid (because Nitric acid is a strong ...
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2answers
353 views

Most likely intermolecular force in aqueous ethanol

The most likely interaction to be found in an aqueous solution of ethanol is A. London dispersion forces B. Hydrogen bonding C. Dipole-dipole interactions D. Ion-dipole interactions I am ...
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3k 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 ...
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2answers
5k 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?
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31 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 ...
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1answer
2k views

VT graph thermodynamics

If we have one mole monoatomic ideal gas was taken through process AB as shown in the figure then ∆ S is positive and work is also positive but how can we find the value of work and heat absorbed as ...
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1answer
112 views

Trying to figure out what these elements have in common [closed]

I have an old periodic table and I marked five metals from groups 1A and 2A with dots to indicate something about them. Only all this time later I can't figure out what exactly it was. I've been ...
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43 views

Why my boiling pot turned black?

Recently I ran out of dish washing detergent, so I decided to pick up one of the recipes online, to make my own "ecological" dish washing detergent alternative. The recipe was: Mix ingredients: ...
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Comparing the order of intermolecular forces [on hold]

Order of intermolecular forces: $$\ce{CO2} > \ce{CH4} > \ce{N2}$$ Here, van der Walls force increases with molecular size. Thought $\ce{CH4}$ is $16 \,\rm g$, it has stronger molecular force ...
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How can I obtain CaCO3 from CaO? [on hold]

How can I obtain CaCO3 from CaO? I feel the backward rxn of decomposition of CaCO3 won't really be feasible. Is there any other way?
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Question regarding charges on certain compounds [closed]

In $\ce{CO3^2-}$, negative charge is on oxygen. In $\ce{SO3^2-}$ negative charge is on oxygen. This is understandable since oxygen is more electronegative, but in $\ce{BF4-}$ negative charge is on ...
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2answers
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How to know dichromate is being reduced from Cr⁶⁺ to Cr³⁺?

When potassium dichromate is being used as an oxidising agent, it gets reduced from chromium(VI) to chromium(III). Is there any way to know that or calculate that other than being familiar with ...
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34 views

Why some compound smell and some not ,what is role of chemistry in it [duplicate]

I was performing an experiment in my high school lab regarding test of inorganic salt,i rub the salt on palm with water it smell like vinegar ,where i take another salt and rub with water it didnt ...
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1answer
28 views

Occurence of double displacement reaction [duplicate]

$\ce{AgNO3 + NaCl}$ gives $\ce{NaNO3 + AgCl}$ but why it's vice versa is not possible. My question is how to predict if a double displacement reaction will occur naturally or not.
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195 views

Why is helium considered as a non-metal?

How can helium be considered as a non-metal based on its chemical properties? Helium is a noble gas; it does not take part in chemical reactions under ordinary conditions. But non-metals tend to gain ...
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1answer
64 views

Sulphur trioxide problem

I'm having minor difficulties solving this problem: How many grams of sulfur (VI) oxide can be derived from 8 g of sulfur and 6 g of oxygen? (S-32) I've tried to solve it this way: $\ce{2S + 3O2 -...
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428 views

What's the role of sodium carbonate and hydrochloric acid for the neutralization of disaccharides into monosaccharides?

A couple of days ago we conducted the following experiment at school: Add 5mL of an aqueous solution of sucrose ($\ce{C6H22O11}$) to 1mL of concentrated hydrochloric acid and heat it for 10 minutes....
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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- ...
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202 views

Inorganic reactions related to nascent hydrogen [closed]

Nascent hydrogen is prepared by (A) $\ce{Na}$ and $\ce{C2H5OH}$ (B) $\ce{Al}$ and $\ce{NaOH}$ (C) $\ce{Zn}$ and dil. $\ce{H2SO4}$ (D) All of these My attempt I know that option (A) &...
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3answers
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Can other molecules than H+ cause a kind of acid reaction?

In our body there are plenty of other positive ions like $\ce{Na+, K+}$ and $\ce{Ca^2+}$. Can they have a similar acid reaction as $\ce{H+}$ ions can do? If not why is just $\ce{H+}$ considered as ...
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1answer
30 views

Can I calculate the percentage of alcohol if I only know that 100ml wheight 90,135 g [closed]

Imagine I have a bottle of 100ml which weight 90,135gr. I know that there is only water and alcohol in it. I know that the weight of water is 0,998 gr/cm3 and alcohol is 0,79 gr/cm3. And when I try to ...
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1answer
56 views

Mastering inorganic chemistry for university [duplicate]

I want book recommendations for inorganic chemistry. I want to learn it in a way that every behavior or equation of elements seems logical and can be explained. Is there any book of that sort? It ...
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1answer
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Structure of IO2F5(2-) dianion

This question came in my exam to draw the Structure of $\ce{[IO_2F_5]^2-}$ I am confused. Here's what I reasoned: Iodine will have hybridisation $\ce{sp^3d^3}$ so it will be pentagonal bi ...
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272 views

The Sørensen pH scale and strong acids diltution from pH 1 to pH 4 by 1000 times?

I am reading a chemistry book that makes the following point about Sørensen's pH discovery regarding [H+] being in negative powers of 10: To dilute a solution from a pH 1 to a pH 4 (just 3 pH ...
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2answers
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How does CaO react with NaOH? [closed]

$\ce{CaO}$ being a basic oxide should not react with $\ce{NaOH}$. Then how come decarboxylation takes place using soda lime? I am confused.
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2answers
254 views

Why doesn't CO2 repel itself? [closed]

In a molecule like $\ce{CO2}$, the oxygens are more electronegative than the carbon, and so the electron cloud is denser around them. Then, isn't the oxygen going to be a negative dipole? The picture ...
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2answers
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can anyone suggest me good chemistry video lectures [duplicate]

Can anyone please suggest me some websites from where i can get free chemistry video lectures?it must be relevant to iit jee syllabus.
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1answer
70 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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1answer
312 views

Why does fluorine form stable oxides while chlorine form unstable oxides? [closed]

The fluorine however it says my text book doesn't combine well with oxygen, nitrogen and itself but when about its oxides they are quite stable as $\ce{O3F2}$ has a melting point of $\pu{363 °C}$ ...
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1answer
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How do reactant proportions affect the products of a chemical reaction?

Is it correct that if you alter the proportions of the reactants of many chemical reactions, especially step-wise, the products will change? Here is an example, please tell me if it is right or not: ...
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1answer
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which chemical element has the lowest boiling point? [closed]

which chemical element has the lowest boiling point? Is it Helium(He) or is it Hydrogen(H)? Hydrogen is lighter than Helium.
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1answer
69 views

Can I grow chlorapatite crystals at home?

Can I grow chlorapatite crystals, $\ce{Ca10(PO4)6(Cl)2}$, at home? Is it as simple as ordering the elements online and throwing them into a beaker, and warming it up maybe?
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1answer
41 views

Why is sodium peroxide not of white colour even if it is paramagnetic? [closed]

Is colour always associated with paramagnetism?
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2answers
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What is reduced and oxidized when potassium bromate reacts to oxygen and postassium bromide?

I'm trying to help lead my daughter to a solution and my high school chemistry is almost 30 years ago. For the following reaction, indicate the species being oxidezed and reduced and show the ...
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2answers
4k views

Why is hypophosphorous acid (H3PO2) a strong reducing agent?

Why is hypophosphorous acid $(\ce{H3PO2})$ a strong reducing agent? the oxidation state of phosphorous in $\ce{H3PO2}$ is $+5$, as hydrogen and oxygen both are more electronegative than phosphorous, ...
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1answer
370 views

HF co ordinate covalent bond? [duplicate]

Is it a co ordinate covalent bond,I think that due to high electronegativity of the fluorine atom it will attract the hydrogen electron towards itself.Am I right in thinking so?
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1answer
268 views

How do you tell whether fluorine goes to axial or equatorial position in iodine dioxide difluoride?

I need to find the $\ce{F-I-F}$ bond angle of $\ce{[IO2F2]^-}$. But the thing is I can put 2 fluorines in the equatorial or axial positions so I get 3 different answers. I'm guessing they're all ...
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2answers
3k views

Why is caesium considered the most reactive element and not fluorine? [closed]

Some people say caesium is most reactive element. I thought it to be fluorine as it is the element that reacts with almost all elements (except couple of inert gases). But caesium won't react many of ...
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2answers
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How to write equations for a reaction of metals with water

Please write two equations for reacting lithium with water and barium with water. Make sure to add the states of matter after each compound. Currently, for lithium I have the equation $$\ce{2Li(s) +...
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1answer
90 views

Burning magnesium ribbon [closed]

I know that this might sound wrong but, in the reaction $$\ce{2 Mg(s) + O2(g) → 2 MgO(s) + energy}$$ isn't oxygen supposed to be oxidised as it has excess electrons $(\ce{O^2-})$ and can donate a ...
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1answer
50 views

Important Stoichiometry question, just need formula or help and answer checking [closed]

How many grams of Cobalt(II) chloride $\ce{CoCl2}$ is needed to make $\pu{0.645 L}$ with a concentration of $\pu{1.25 mol\:L^{-1}}$? (the molar mass of anhydrous $\ce{CoCl2}$ is $\pu{129.839 g\: mol^...
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1answer
117 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
63 views

Compounds with high electron density [closed]

If $d$ is the ratio of the total number of electrons in a compound and the average radius(of all anions and cations, or covalent radii), are there known compounds (inorganic or organic) where $d$ is ...
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1answer
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Chemistry of making glass [closed]

To boil glass, the lime and sand mixture of potash was heated and the off gas spent $\pu{125 mL}$ of barley hydroxide solution (density $\pu{1.14 g mL-1}$). The mass of the sediment was $\pu{4.925 g}$....
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2answers
555 views

water in redox reactions [closed]

why water can't react as anode , with metals , in a redox reaction? while studying electrochemistry, i passed through a table with certain metals , all having voltage (potential energy) less than ...
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1answer
25 views

Do you know book's name under the topic of anti corrosion materials and binders? [closed]

I need book's name talking about anti-corrosion materials or binders to complete my graduation project
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1answer
341 views

why bond length of double bond is less than that of triple bond? [closed]

why bond length of double bond is less than that of triple bond ? I came across this question many a times. I am confused because there is a sigma bond and two phi bond in triple bond and a sigma and ...
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1answer
200 views

Different types of oxide [closed]

Among the following oxides in order amphoteric, Basic, Acidic, Neutral and mixed oxides respectively: $\ce{B2O3, SnO2, CO, Pb3O4, CaO}$ I know metals are basic and non metals are acidic . But ...
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1answer
985 views

What is the effect of change in pH on precipitation? [closed]

What is the effect of change in pH on precipitation? I was curious as to how pH actually affects precipitation.