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.
3,273
questions
1
vote
1answer
10 views
Is there a connection between M1V1=M2V2 and Boyle’s Law?
Recently in Chemistry 101 we learned about $M_1V_1=M_2V_2$, where $M$ is the molarity of the two mixtures and $V$ is their respective volumes.
The first thing that popped into my mind when I saw ...
-2
votes
0answers
9 views
Hess’ Law question [on hold]
The ionic equation for this reaction is shown.
Ca(s) + 2H+(aq) → Ca2+(aq) + H2(g) ∆Ho = x kJmol–1
Construct a fully labelled Hess’ Law cycle to connect each side of this equation to the relevant gas ...
-2
votes
1answer
52 views
Is neutralized and dried suphuric acid still a hazard? Is it still acidic to touch?
I mistakenly put a sulfuric acid drain cleaner in my bathroom sink. Some of it spilled into the bathroom in my basement. I cleaned it up using baking soda, but I'm concerned if I missed any, whether ...
-2
votes
0answers
10 views
Effect of electronegativity [on hold]
Explain the effect of electronegativity when the surrounding atom is the same with different central atom having lone pair,refer to the second point of effect of electronegativity in
Blockquote
JD ...
11
votes
3answers
2k views
Explanation for why nickel turns green in hydrochloric acid
My daughter has a chemistry test that I am helping her prepare for. One question is
Nickel sulfate, $\ce{NiSO4(aq)}$ is a green solution. Nickel chloride, $\ce{NiCl2(aq)},$ is a yellow solution. If ...
-3
votes
0answers
18 views
What determines how substances should be stored? [on hold]
(Що впливає на умови зберігання речовин)
Some substances can be stored solely dissolved, others only pure. Give at least two fundamentally different examples of both organic and inorganic substances ...
-2
votes
0answers
28 views
Why isn't Kw = ([H+][OH-]) / [H2O], when H2O is the reactant?
For the hypothetical reaction:
$$ \ce{A <=> B + C}$$
the equilibrium constant expression is written as
$$\ K= \frac{[\ce B][\ce C]}{[\ce A]} $$
So, why is $ K_\mathrm w $ written as:
$$ K_\...
-1
votes
0answers
37 views
Why highly electropositive elements form strong bases?
I know that elements like sodium form hydroxides completely dissociate in water than magnesium hydroxide. I came to a conclusion that the nature of bonding may affect this result, that is ostensibly ...
-1
votes
1answer
13 views
Electrophilic base / nucleophilic acid / basic electrophile / acidic nucleophile [on hold]
What I was understanding is that all bases are nucleophiles and acids are electrophiles means the condition for them is same and all nucleophiles are basic and all bases are nucleophiles and same for ...
-1
votes
0answers
20 views
Back bonding in p block elements [on hold]
Why is back bonding not possible beyond period 3?
As in why only between 2nd period elements and 2nd and 3rd period elements?
0
votes
1answer
35 views
Decomposition of Metal Nitrates
An entrance JEE Main & Advanced AIEEE 2003 exam question:
Which one of the following nitrates will leave behind a metal on strong heating?
A. Copper nitrate
B. Manganese nitrate
C. ...
-2
votes
0answers
21 views
How to homogenise Calcium Chloride Dihydrate with Corn Starch Powder? [on hold]
How to homogenise Calcium Chloride Dihydrate (77%) with Corn Starch Powder? And then how to remove moisture in the mixture? What's reaction requires?
-2
votes
1answer
52 views
Conditions for the reduction of dichromate by manganese(II) to chromium(III) [on hold]
The unbalanced redox reaction
$$\ce{Mn^2+ + Cr2O7^2- -> Mn^3+ + Cr^3+}$$
occurs in what type of condition?
(a) Acidic
(b) Basic
(c) Neutral
(d) Indeterminable
-1
votes
0answers
27 views
Ionic lattice structure of copper (II) sulfate pentahydrate
I would like to ask about the structure of the $\ce {CuSO4*5H2O}$ solid. Recently, I have learnt that the colour of $\ce {CuSO4 * H2O}$, an intermediate in the thermal decomposition of the ...
-2
votes
0answers
39 views
Why do F and N don't make a bond? [closed]
The electronic Configuration of F has 2p5 in the end and N has 2p1 in the end.
So N can give one of it's electron to F to aquire stability? Why dosen't this happen ?
4
votes
1answer
277 views
Calcium ion and sulfate did not form precipitate
I was in the chemistry lab earlier this week. We were doing a qualitative experiment (no concentration given for any solution).
I added an unknown solution that contains $\ce{Ba^2+},$ $\ce{Ca^2+},$ ...
0
votes
0answers
23 views
Why does ammonia have a pKa of 32.5 at −33 °C?
According to Wikipedia, ammonia has a $\mathrm{p}K_\mathrm{a}$ of $32.5$ at $\pu{-33 °C}.$ Why does it say that? Is it a typo? Isn't anything above $12$ is a very strong base? And both bases and ...
2
votes
1answer
36 views
Why does the displacement reaction of zinc in copper(II) sulfate solution result in dark metallic copper?
It is commonly known that when zinc metal is placed in a solution of copper(II) sulfate, a displacement reaction occurs, and elemental copper is deposited onto the decomposing zinc metal. A practical ...
-4
votes
0answers
27 views
Can we use KOH for absorbing the CO2 released in cigarettes to protect lungs from CO2? [closed]
What are the possibility that it will not harm the inhalers?
-2
votes
0answers
13 views
I don't understand how hydration enthalpy is working for Cu+2 and Ni+2 [closed]
Even though Ni+2 has same hydration enthalpy as Cu+2 still Cu+2 has +reduction potential whereas Ni has negative
-3
votes
0answers
14 views
Based on inorganic chemistry of clorine? [closed]
What will formed when hot NAOH REACT WITH chlorine gas ?
-2
votes
0answers
13 views
Based on chemistry p lock anser it? [closed]
On heating lead{2} nitrite gives a brown gas A . the gas A on cooling changes to colourless B solid. B on heating with NO chanes into bluesolid C.identify it A,B,C AND DRAW
-3
votes
0answers
29 views
What is the identity of the unknown? [closed]
I have calculated that the mass of the unknown is 2.02g. The mass of Epsom salt initially present in the unknown is 0.724g. The percentage of Epsom Salt in the unknown is 35.84%. The chemical formula ...
0
votes
1answer
35 views
Zinc evaporation/toxicity at room temperature [closed]
I have a (slightly embarrassing) question regarding zinc powder.
I have recently broken an old mercury thermometer, and read that I can handle the mercury with powdered zinc - so I've sprinkled some ...
0
votes
0answers
35 views
Can sodium silicate be made insoluble?
In this question, the user asked about curing sodium silicate with calcium chloride. My question is, will the resultant product be insoluble in water? I know calcium silicate is only very slightly ...
-2
votes
0answers
25 views
Why is Cu+1 less stable than Cu+2? Shouldn't it be the other way around? [duplicate]
After all in +1 state all the d orbitals degenerates are completely filled but in +2 only 4 degenerates are paired, there is an unpaired electron.
-5
votes
2answers
68 views
What is the mass of ozone present in 10.6 g of Na2CO3? [closed]
I got a question in my textbook asking for the mass of oxygen present in 10.6 grams of $\ce{Na2CO3}$.
Why are they asking about the mass of oxygen? Does this refer to $\ce{O2}$? Shouldn't it be the ...
-1
votes
0answers
27 views
For the purposes of auto racing, I am a Nascar driver trying to design a solution for heat exposure [closed]
Question, is it possible to pump liquid through some type of specially designed cool shirt without fluid coming in and out of the shirt, but rather just circulating and cause a chemical reaction to ...
2
votes
1answer
34 views
Formation of green precipitation whilst adding potassium fluoride to aqueous solution of copper(II) sulfate [closed]
Aqueous copper sulfate solution (blue) gives a green precipitation with aqueous potassium fluoride. Explain these experimental results.
I've read answers like, $\ce{H2O}$ is a weak ligand and ...
-3
votes
0answers
35 views
Can I get a sulfur colloid by mixing H₂S with H₂SO₃ in water? [closed]
I want to make a colloid that shows rayleigh scattering so the light that passes through is orange but it seems blue
-2
votes
0answers
19 views
Mechanism of redox reaction between sulfur and nitric acid [closed]
Can someone describe the mechanism for the reaction between sulfur and concentrated nitric acid?
-1
votes
1answer
54 views
Question About Reversible Reactions and Batteries
So my book says that the batteries we have considered so far( Daniell cells) are low life span, because they reach equilibrium too fast. In the next paragraph, it says they are also made by ...
3
votes
1answer
94 views
How can batteries reach equilibrium if the reactions are irreversible?
My book says that the batteries we have considered so far (Daniell cells) have a low life span because they reach equilibrium too quickly.
In the next paragraph, it states they are also made by ...
-1
votes
1answer
24 views
How to produce Calcium Chloride Desiccant for Ocean Container
I want to produce Calcium Chloride container Desiccant for Food and Textiles related items.
I have this specs of Calcium Chloride and i have PP Non Woven Bags for its packaging. I want to know just ...
1
vote
0answers
45 views
What is the purpose of phase matching when drawing a MO diagram?
During the lecture, we were learning how to draw the MO diagram for $\mathrm{BF_3}$.
I understand that only orbitals with the same symmetry labels can interact and form molecular orbitals. My ...
0
votes
0answers
56 views
Can a universal indicator turn colorless?
I learned that litmus paper could be bleached by chlorine to turn colorless. I’m wondering if any chemical substances can react with all the components of a universal indicator such that it turns ...
1
vote
0answers
39 views
How much time does sulfur dioxide take to oxidize to trioxide in air?
I saw that $\ce{NO2}$ is oxidized really fast, but if I put $\ce{SO2}$ in a jar with air at STP, will it take hours, days or years to react into $\ce{SO3}?$
-1
votes
0answers
42 views
Why N=N is much stronger than N—N but C=C isn't
Why N=N bond is much stronger than N—N bond (about 2.5 times) but C=C is not (less than 2 times)?
IMO, the radius of nitrogen and carbon atoms play a big role here. Since rN < rC, the AOs creating ...
-1
votes
0answers
27 views
Solution of metals in liquid ammonia [duplicate]
What is the colour of the solution obtained by dissolving alkaline earth metals in liquid ammonia ? Some sources (like jd lee) says it is bright blue but some other say black blue. I know it is blue ...
0
votes
3answers
69 views
The thermal decomposition of FeCO3
The thermal decomposition of siderite equation: $\ce{FeCO3 -> FeO + CO2}$ looks correctly balanced to me, you can notice $\ce{1 Fe , 1 C , 3 O}$ on the Left side and the same number of molecules on ...
1
vote
0answers
36 views
Finding ionic radii from solubility data and density
$\pu{5.35 g}$ of a salt $\ce{ACl}$ is dissolved in $\pu{250 ml}$ of solution. The $\mathrm{pH}$ of the resultant solution was found to be $4.85.$ Find the ionic radius of $\ce{A+}$ and $\ce{Cl-}$ if ...
0
votes
1answer
87 views
Understanding the structure of NCS⁻
Predict the most preferable structure of $\ce{NCS-}.$
$$\Large\underset{(\textbf{1})}{\ce{(:\!\!\overset{\huge.\!\!.}{N}=C=\overset{\huge.\!\!.}{\underset{\huge.\!\!.}{S}})-}}\qquad\underset{(\...
2
votes
1answer
42 views
Latimer diagram for a metal in basic solution
Write the four half cell reactions from the Latimer diagram for a metal $(\ce{M})$ in basic solution.
$$\ce{\overset{+6}{M}O4^2-(aq) ->[\pu{0.25 V}] \overset{+5}{M}O4^3-(aq) ->[\pu{0.55 V}] ...
-1
votes
0answers
26 views
Does UV and Visible Light affects the Core electron, Valence electron, or Both?
When exposed in UV or Visible Light radiation, matter is induced to perform electronic excitation. Is the electron that excites, a core electron, a valence electron or can they both be excited?
...
4
votes
1answer
75 views
Why does concentration of solutions of alkali metals in liquid ammonia change the magnetic properties?
In "NCERT Chemistry for Class XI - Volume II", in chapter "s-block elements", under the topic "Chemical Properties of alkali metals", it is given:
(vi) Solutions in liquid ammonia: The alkali ...
0
votes
0answers
37 views
Determining the half-potential using Latimer diagram
$$\ce{\overset{+7}{Br}O4- ->[\pu{+1.82 V}] \overset{+5}{Br}O3- ->[\pu{+1.49 V}] H\overset{+1}{Br}O ->[\pu{+1.59 V}] \overset{0}{Br}_2 ->[\pu{+1.07 V}] \overset{-1}{Br}^-}$$
I'm supposed ...
0
votes
0answers
17 views
Preparation of standard Fe from FeSO4 • 7H2O
We were assigned to prepare a standard Fe for spectrophotometry determination of Fe. What we did is basically obtain a mass of FeSO4•7H2O, add a small a mount of distilled water before adding 18M of ...
-2
votes
1answer
51 views
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 ...
0
votes
1answer
51 views
Colour in muriate of Potash? [closed]
Alkali earth metals produce white coloured salts with halogens like chlorine. But Muriate of potassium available in India generally used as a fertilizer is pink coloured(reddish white actually), why ...
2
votes
2answers
201 views
Help in drawing resonance structures in case of polybasic acids
While drawing resonance structure of dibasic or tribasic acid, e.g. should I take out two $\ce{H+}$ (in dibasic) or three $\ce{H+}$ (in tribasic) together or one by while drawing resonance structure?
...
