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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Is this definition of the verb oxidize correct? [closed]

UPDATED VERSION: There are a dozen definitions of the verb oxidize in various dictionaries. My question is whether the definition in the end of this post holds true. I have added the words in bold. ...
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Why is CH2Br2 more polar than CH3I? [closed]

According to my textbook (A Level Chemistry a for OCR Student Book, Pages 84-5) $\ce{CH2Br2}$ is more polar than $\ce{CH3I}$. The molecules are both polar, they both contain different bonded atoms, ...
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87 views

Why doesn't the sulfate anion in copper(II) sulfate have a subscript of 2? [closed]

So I'm being asked to find the chemical formula for copper(II) sulfate. I thought it would be written as: $$\ce{Cu(SO4)2}$$ Apparently it's written as: $$\ce{Cu(SO4)}$$ Can anyone please explain ...
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Reaction of fluorine with cold water

According to my textbook, when fluorine reacts with water, it produces oxygen and ozone. \begin{align} \ce{3F2 + 3H2O &-> 6HF + O3}\\ \ce{2F2 + 2H2O &-> 4HF + O2} \end{align} Is ...
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Chemistry chemical bonding [closed]

when a chemical bond is formed, does chemical reaction occur? if i have done a coating on metal substrate then how does it adhere to the substrate? If there is a chemical bond then which reaction does ...
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756 views

How can you calculate a new Keq when a reaction is reversed? [closed]

Consider the following equilibrium: \begin{align} \ce{H2 (g) + I2 (g) &<--> 2HI (g)}& K_\mathrm{eq} &= 50.0 \end{align} What is the value $K_\mathrm{eq}$ for the reaction ...
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97 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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92 views

Chemical Anti-bonding and Pauli repulsion [closed]

We can explain chemical anti-bonding just using the Pauli repulsion correct?Let's take He2. 2 atoms of He share 4 1s electrons and since the magnetic spin for electrons has 2 values there would be 2 ...
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65 views

Conditions for the reduction of dichromate by manganese(II) to chromium(III) [closed]

The unbalanced redox reaction $$\ce{Mn^2+ + Cr2O7^2- -> Mn^3+ + Cr^3+}$$ occurs in what type of condition? (a) Acidic (b) Basic (c) Neutral (d) Indeterminable
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Can concentrated sulfuric acid oxidize iron(II) to iron(III)?

Can concentrated (18 M) $\ce{H2SO4}$ oxidize $\ce{Fe^2+}$ to $\ce{Fe^3+}?$ Or does it actually block the oxidation? I read in some forum somewhere that in order to prevent $\ce{Fe^2+}$ from being ...
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Mass percentage of water in hydrate? [closed]

1.034 g of a metal sulfate hydrate was heated to a high enough temperature to remove all the water of hydration. The mass of the anhydrous salt left behind was found to be 0.956 g. What is the mass ...
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How to give different Basis set to different atoms in molecules using GAMESS-US [closed]

I am new to GAMESS-US, I am trying to do UHF for DyC10H10 while giving different basis set to Dy, C, H to reduce the computational cast. Until I tried with following input using manual. OUTPUT *** ...
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1answer
75 views

1000 mg/L alkalinity as CaCO3 standard preparation [closed]

How do I prepare a 1000 mg/L alkalinity as CaCO3 standard? I found a method that says to dissolve 1.06 g of sodium carbonate (Na2CO3) in 1L of water but I'm not sure why I can't use 1g instead? ...
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1answer
48 views

Electrical resistivity [closed]

I have read that in non-metals solids the electric resistivity is reduced if we increase temperature.But this isn't logical.I mean if temperature is increased ok the electrons get extra energy but as ...
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Uses of Chlorine [closed]

Why in the reaction between sodium chlorate and water is chloric acid produced as well as Na+ and OH- ions. Shouldn't both the ions just react to produce NaOH?
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Anyone know if this kind of Polyethylene is safe to use? [closed]

I'm planning to make a weighted blanket and I've looked around the internet and most people use poly pellets or glass beads for the weight. Glass beads is kinda hard to find in where I live, so I ...
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63 views

Getting from pH 2 to pH 6 by mixing with water

In our book we learned that we can get an acid to a higher $\mathrm{pH}$ by mixing it with water in the relation $\frac {1}{10} $. Now to my problem: How much water do you need in order to get the $\...
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Dimensional Analysis [closed]

In a dimensional analysis problem they take 6.20L x (1ft^3/28.3L) x (12in^3/1ft^3) to get 378 in^3. Why do they express the 12in^3 as 12x12x12? To me it would be expressed as 6.20/28.3*12 to get 2....
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Electron Energy Levels? [closed]

New to chemistry; In my book it talks about electrons in atoms moving from one energy level or shell to another and denotes this by n. How does this exactly happen, do electrons move to different ...
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1answer
210 views

Molarity of silver(I) nitrate solution after the reaction with magnesium [closed]

$\pu{3 g}$ of $\ce{Mg}$ are placed in $\pu{500 mL}$ of $\pu{0.625 M}$ $\ce{AgNO3}$. When the reaction is complete, what is the molarity of the $\ce{AgNO3}$ solution? I'm thinking you need to use $...
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What is the acid base reaction between hydrogen telluride and sulfide ion?

$$\ce{H2Te + S^2- -> ?}$$ I tried this problem but I was confused on the fact of what the products would be because in my head I didn't think $\ce{STe}$ is a product and also it has to create ...
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Different types of carbides [closed]

I am confused between different types of carbides such as $\ce{CaC2}$, $\ce{Mg2C3}$, $\ce{Al4C3}$, $\ce{BaC2}$ or $\ce{BeC2}$. And if they are different, why they are called carbides?
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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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454 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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1answer
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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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1answer
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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
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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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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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Finding magnetic moments of the complex [Ni(CN)5H20]3- [closed]

How is the spin only magnetic moment of the complex [Ni(CN)5(H20)]3- calculated ?
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Synthesis anhydrous AlCl3 [closed]

It is said that $\ce{[Al(H2O)6]Cl3}$ can be dehydrated to AlCl3 by heating while passing over dry hydrogen chloride gas. My question is- can this be done with 100% $\ce{[Al(H2O)6]Cl3}$, or does some ...
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SQUARE PYRAMIDAL GEOMETRY

I had this question on a test as to what would be the bond angles in square pyramidal geometry ? According to me lp-bp repulsion being greater than bp-bp repulsion the angles would deviate from ...
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1answer
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Selectivity of metal nitrates towards ammonium bicarbonate

I am performing coprecipitation reaction, and in the precipitating step, I have a bunch of metal nitrates(ferric nitrate, aluminium nitrate and barium nitrate)in a solution reacting with ammonium ...
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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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1answer
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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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710 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
66 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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1answer
526 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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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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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
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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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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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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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1answer
279 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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Why organic reaction mechanisms so popular [closed]

Why are organic reaction mechanisms so much more popular than inorganic mechanisms? When I come to think of it, what is a reaction mechanism? How can we use an arrow? Is it a rough approximation of ...
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2answers
295 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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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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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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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 $\pu{363 °C}$ ...