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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What is the affect of increasing acidity of a solution that undergoes photo reduction?
How does increasing the acidity of a solution affect the photochemical reaction, for example, iron(III) to iron(II)?
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Oxidation reaction of dimethylselenide / Selenourea with hydrogen peroxide
For my paper, I need to find the reaction between $\ce{(CH3)2Se2}$ and $\ce{H2O2}$ and between $\ce{SeC(NH2)2}$ and $\ce{H2O2}$. The mechanism below shows how I think it goes. The reaction should ...
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How do I identify the compound(s) that formed from a failed synthesis of another compound?
A general answer to the question is great, but specified to my problem is very much welcomed.
My team had a lab project — to synthesize chrome alum crystals.
We first dissolved $0.3 \, \rm g$ of ...
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It takes 4 min for the concentration of reactant A to decrease from 3.0 M to 1.0 M. What is the average rate of the reaction over this 4 min period?
A reaction happens where A is converted into B. It takes 4 min for the concentration of reactant A to decrease from 3.0 M to 1.0 M. What is the average rate of the reaction over this 4 min period?
...
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How the sigma, Pi, delta bonds are formed with metal d orbital participation [on hold]
Show how the sigma bond Pi bond and delta bond are formed with metal d orbital participation
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Determining amounts of product and excess reagent remaining post reaction
$$\ce{2FeS2 + 11/2 O2 -> Fe2O3 + 4 SO2}$$
Mass of $\ce{FeS2}$ is $\pu{600 g}$ and mass of $\ce{O2}$ is $\pu{800 g}$. Find the amounts of $\ce{Fe2O3}$ and $\ce{SO2}$ and the remaining amount of ...
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To prepare 2% iodine solution in potassium iodide [on hold]
how to prepare 2% iodine solution in potassium iodide? This is to carry out an experiment to test the amount of fats in several food items.
i have iodine crystals, potassium iodide salt .
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Calcium Nitrate - Why only 18.8% Calcium for fertiliser?
I brought a kilo of Calcium Nitrate for my hydroponic setup.
The chemical formula for Calium Nitrate is Ca(NO3)2. I did a quick calculation of its weight:
Ca = 1*40.078
N = 2*14.006 = 28.012
O =...
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2answers
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Does silver oxide react with hydrogen sulfide?
Electronic connectors are often silver plated. However, silver tarnishes fairly quickly and heavily. There exists a widespread misconception that the tarnishing of silver contacts is harmless, because ...
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What are the differences between grade 3 water and distilled water?
I know the definition and properties of distilled water and grade 3 water.
But what I know about grade 3 water and distilled water is not sufficient to distinguish them.
Is grade 3 water obtained ...
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What is the colour of hexaamminechromium(3)? [on hold]
What is the colour of hexaamminechromium(3) when we add extra Ammonium hydroxide to Chromium Hydroxide?
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Mass Percentage [on hold]
An aqueous solution of iron(II) chloride contains 5.02 grams of iron(II) chloride and 17.3 grams of water.
What is the percentage of iron(II) chloride by mass in the solution?
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A question in stiochiometry [closed]
How many moles of $\ce{NH3}$ are there in $\pu{90 L}$ of it at STP?
$4$
$32\times 10^{23} $
$23$
$3.2$
Please explain your answer as much as possible.
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2answers
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MO diagram of BeH₂
I was learning about the MO diagrams of triatomic molecules and was left slightly confused about $\ce{BeH2}$.
A picture of the MO is shown below:
When looking at the $\mathrm{1s}$ combinations, I ...
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Effect of Concentration on Reaction Rate - Calculating Final Concentrations in Solution [closed]
Question asks:
Determine the final concentration of IO₃⁻ used in the reaction. Show a complete sample calculation for the (8.0 mL Solution A + 2.0 mL H2O
Equation:
IO3− + 3HSO3− → I− + 3 HSO4−
...
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Self-learning and improvement [closed]
I'm a pharmacy undergraduate and I want to increase my about chemistry ,so what are the books about (organic , general, inorganic) should I read during my summer holiday?
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Storing hydrofluoric acid before the invention of plastics
The first person to synthesize hydrofluoric acid in large quantities was Carl Wilhelm Scheele in 1771. This acid is known for its ability to corrode glass and metals.
What materials were the ...
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Precipitating silver(I) salts from the solution of barium(II) cyanate and iodide
Consider a $\pu{10.0 mL}$ solution containing $\pu{1.0e-10 M}$ each of $\ce{Ba(CN)2}$ and $\ce{BaI2}$. If $\pu{3.5e-9 mol}$ of $\ce{AgNO3(s)}$ is added to this solution, will any precipitate(s) form? ...
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1answer
37 views
Making hard water
Does anyone know how to make hard water with a hardness of 200+ ppm in terms of $\ce{CaCO3}$?
I live in Seattle and we have very soft water and we need hard water for testing purposes. Obviously you ...
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2answers
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Sodium Sulfate vs Sodium Sulfite
I recently took a test and one of the questions was:
Which procedures will allow a student to differentiate between solid sodium sulfate and solid sodium sulfite?
I. Make solutions of each ...
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1answer
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Change in H+ ion concentration of water on boiling [closed]
I know that on boiling water, pH scale decreases but water remains neutral. At 100°C the pH=6.14 is neutral. And at this temperature also, the H+ ion concentration and OH- ion concentration are equal....
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Ionisation energies of Carbon and Boron
The first ionisation energy of Carbon atom is greater than that of Boron atom whereas, the reverse is true for the second ionisation energy.
In order to explain the above statement I considered the ...
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1answer
42 views
How do I get irreducible representations?
I'm currently trying to do a problem where it asks me to "show that the irreducible representations spanned by the atomic x-, y-, and z- coordinates is independent of the choice of local coordinate ...
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Preparation of Copper (II) Sulfate Pentahydrate Solution
how would you make a solution of Copper (II) Sulfate Pentahydrate to achieve 150, 200, 250 and 300 mgL−1 concentration of copper? I do not have the anhydrous version of the solute. Also, when I ...
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2answers
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Is [Co(NH₃)₄Cl₂]Cl paramagnetic or diamagnetic?
$\ce{NH3}$ is known to be a strong field ligand, while $\ce{Cl}$ is known to be a weak field ligand.
Is $\ce{[Co(NH3)4Cl2]Cl}$ a high spin complex or a low spin complex?
I assumed this to be a high ...
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1answer
30 views
Electrolysis - What is the basis for the discharge rules?
At the cathode, the one that is discharged is the less reactive one (compared to hydrogen) so why at the anode is the one that’s discharged more reactive (less stable) ?
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2answers
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Influence of pH on precipitate crystallite sizes?
It's normally assumed that a higher pH of solution would slow nucleation rates and hence lead to larger crystal formation. I've found literature that it is due to solid-liquid inter-facial tension. ...
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1answer
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Why is the Van der Waals constant of water lesser than benzene?
Van Der Waals constant of water and benzene ($a$) are $5.537$ and $18.82$ respectively.
I have read that the value of Van Der Waals constant indicates the extent of attractive forces.
By this, ...
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0answers
30 views
Why does Nitric acid not dissolve Fe2O3? [closed]
I tried to dissolve $\ce{Fe2O3}$ in hydrochloric and nitric acid. Both were slightly dilute and heated till boiling. Only hydrochloric acid worked. Why? (Please don't just look up solubility ...
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1answer
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Electronic configuration of the actinides
I was reading about actinides and I need some help in understanding this paragraph from Concise Inorganic Chemistry by JD Lee -
The electronic structures of the actinides do not follow the simple ...
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1answer
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Equation for reaction between chlorine fluoride and potassium bromide
The equation given in the answer key was
$$\ce{ClF + 2KBr → KCl + KF + Br2}$$
However won't the $\ce{KCl}$ also react with $\ce{ClF}$ to form $\ce{KF}$ and $\ce{Cl2}$, resulting in the net reaction ...
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1answer
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Only d orbital electrons for spin only magnetic moment
During my chemistry lessons and self studies, I have come upon many instances where I observed that during calculations of spin only magnetic moment of transition elements only the d orbital electrons ...
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1answer
50 views
Negative oxidation state
Why doesn’t aluminum have negative oxidation states? In almost all compounds of aluminum which I know of has positive oxidation state.
It has valence EC [Ne] 3s2 3p1 , my teacher told it usually ...
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Magnesium burning in carbon dioxide
Why does $\ce{Mg}$ keep burning in $\ce{CO_2}$ and why does the fire generated by the exothermic production of $\ce{MgO}$ not get extinguished?
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Why hydrate metal precursors used in synthesis of metal-organic frameworks, MOFs?
To synthesize metal-organic frameworks materials it mostly uses the hydrate metal precursors, so why should we use this kind, and can we use the anhydrous salt?
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How can we conduct reactions for insoluble materials?
I am working on metal organic polydehra topic to synthesize new metal-organic cages or other based frameworks. I want to conduct postsynthetic modification for one cage, but the solubility is very ...
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1answer
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Thermal stability order of NaF, MgF2 and AlF3
I came up with a question to arrange thermal stability order of $\ce{NaF}$, $\ce{MgF2}$ and $\ce{AlF3}$ and I think the answer is $\ce{NaF>MgF2>AlF3}$ because $\ce{Na+}$ has largest ionic radius ...
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Changes in metal-ligand bond lengths of coordination compounds
Consider change in length of the metal-ligand bond in the following reaction:
$\ce{[Cr(CN)6]^3- + e^- -> [Cr(CN)6]^4-}$
I initially had two theories (based on general electrostatics and d-...
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1answer
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What is the crystal structure of bismuth oxyhydroxyphosphate (BOHP)?
The recent Chemical & Engineering News article Photocatalyst shreds drinking water contaminant PFOA report the following:
Cates and his colleagues made an accidental breakthrough while testing ...
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2answers
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Chemical reaction
Consider the following
Ca(OH)2 + 2NH4Cl → CaCl2 + 2NH3 + 2H2O
(Source: https://chemiday.com/en/reaction/3-1-0-440)
It appears to be double displacement reaction as CaCl2 is formed, but it’s not as ...
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1answer
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Help with finding the right catalyst and reaction conditions for hydroamination reaction
A friend of mine, final year PhD, and I, final year Bachelor, are focusing on hydroamination reactions. In particular those with secondary amines and substituted alkenes. The reaction in particular is ...
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Relation between size and lattice energy
I came across the statement “BeO and MgO have high melting point because of the lattice energy of BeO and MgO is appreciably high due to their small size” in my mAterial
I didn’t understand what ...
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39 views
Which has greater N-O bond length: NO or NOCl?
I came across this question. According to me NO should have a shorter bond length as it has a triple bond, while NOCl has a double bond.
But the answer is given that NO has greater bond length than ...
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I have prepared ferrous sulfate solution in water. After some time, brown precipitates observed. How to prevent the same?
When ferrous sulfate solution is prepared in water, after some time, brown precipitates appear, how to prevent the precipitates.
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1answer
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What exactly is the parasitic white layer that forms after iron parts are treated with ammonia? [closed]
I have little to do with chemistry and my only background is the inorganic chemistry I learned at school when I was 13-14 years old.
I need to have a basic understanding of the nitrating process (for ...
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1answer
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To predict if a substance is deliquescent
FeCl3,FeSO4 and CuSO4 all are deliquescent solids.
Is there any way to predict this without knowing this fact?
I am looking for a way to predict if a substance is deliquescent for my upcoming ...
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1answer
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What are the products in the reaction of sulphuric acid and Group 2 metals?
When group 2 metals, says magnesium, is reacted with nitric acid, oxide of nitrogen is produced beside hydrogen gas. The standard electrode potential values agree with this:
$$
\begin{align}
\ce{Mg^...
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2answers
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In Lassaigne's test, the organic compound is first fused with Sodium Metal instead of any other Group 1 Metal, Why is this so?
I know that Sodium has high polarising power than potassium so it can convert the respective functional groups more readily than Potassium and both Lithium and Sodium salts are soluble in water. This ...
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2answers
351 views
How does strength of boric acid solution increase in presence of salicylic acid?
A while ago, I read that salicylic acid can make boric acid solution strongly acidic when it's added to it.
To my knowledge, I know that boric acid becomes a strong acid in presence of cis-diols (...
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1answer
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Determining the formula of tin(II) chloride hydrate [closed]
$\pu{1.20 g}$ of hydrated tin chloride decompose to form $\pu{1.01 g}$ of anhydrous tin chloride on heating. Calculate the value of $x$ given
$$\ce{SnCl2.xH2O -> SnCl2 + x H2O}$$
I done it ...
