Questions tagged [ozone]

Ozone is an allotrope of oxygen with the general formula O3. It is hence also known as trioxygen. This tag should be applied to questions, that are specifically about its structure, properties, and uses in chemistry.

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46 views

Question on identification of a compound

Question: Multiple correct answers are possible My Approach: I just found structure Q for all options A, B, C and D for which I have uploaded the structures below with their corresponding options. ...
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1answer
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Electrons distribution of oxygen atoms in ozone [on hold]

While dealing with the Lewis structure for ozone, most of the explanations show the electron distribution around the 3 oxygen atoms with a single and double bond. But if you count the number of ...
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2answers
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Rate law for breakdown of ozone to oxygen

For the following problem: Example 3: Write the rate law for $\ce{2 O3 -> 3 O2}$ given that the f‌irst step is fast and reversible, and the second step is slow. $$ \begin{align} &\text{...
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223 views

Number of optically active compounds among the products of ozonolysis

The number of optically active compound(s) obtained upon complete ozonolysis of the following optically active compound is In the question, I broke all the double bonds and added a $\ce{-CHO}$...
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23 views

Pressure dependent rate coefficient

I am trying to study how the pressure will affect the formation of ozone at around 5 bar. So, I am looking for a simple relation between the reaction rate coefficient and the pressure to use it in my ...
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Ozone cross-section in the near-infrared

I am searching for ozone absorption cross-section in the wavelengths range 1.1 μm to 10 μm. So far I looked in the following databases: HITRAN Max-Planck Institute for Chemistry Mainz and of ...
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26 views

Ozonolysis of 1,2,3,4,5,8‐hexahydronaphthalene

Consider 1,2,3,4,5,8‐hexahydronaphthalene: If one equivalent of ozone is added, then which double bond will undergo ozonolysis? If it attacks the more electron rich one, then unstable 10 membered ...
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1answer
41 views

Removing ozone from a gas flow

I have a potential problem in that I need to reliably remove ozone from a stream of ionized gases, mostly air. The flow rate is quite low, less than 400 sccm. I was thinking of something catalytic, ...
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1answer
98 views

Reduction with NH2-NH2 , OH-, and glycol

this question was asked in my exam and I have done it properly until the very third step but unfortunately, although the last step looked like wolfkishner reduction to me I could not do it. My ...
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1answer
25 views

EPDM tube resistant to ozone on the long run?

I am working with ozone produced with an ozone generator and pure oxygen. The resulting O2 / O3 gas mixture is probably about 80-85% O2 and up to 15-20% O3. The generator does produce about 500g of ...
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90 views

Ozonolysis mechanism question

Is this mechanism will be similar to ozonolysis ? My try : My Question is will B be the answer ? And what does Me2S do ?
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141 views

Will UVC light/ozone affects color on fabrics?

I'm planning to put a low power UVC light bulb into my wardrobe to kill bacteria and prevent bad smell on clothes but I'm wondering will it affect color on the clothes? I've done some research but ...
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775 views

How does the 1.5 bond order of ozone contribute to its instability?

I'm confused as to why ozone is so unstable? I've been told it's because it has a fractional bond order. However, this doesn't make sense to me. Don't fractional bond orders mean resonance and doesn't ...
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259 views

Reacting NaOH in solution with O3

I use common air to produce ozone. However the gas after the ozone generator does contain $\ce{NO2}$ gas, which I have to remove for the subsequent steps. I tried to remove the $\ce{NO2}$ with a ...
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257 views

How to measure ozone output of an ozone generator using chemical methods

I have the need to optimize an corona discharge based ozone generator. There are certain variables like frequency and voltage which I can change. The easiest way would be to use an ozone analyzer – ...
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1answer
432 views

Role of solvents in ozonolysis and oz0nolysis of alkynes with water [closed]

My text book says that when an ozonide (formed from an alkene) is treated with $\ce{Zn/CH3COOH}$, it cleaves to give carbonyl Compounds. 1) Does $\ce{ Zn/CH3COOH}$ mean Zinc in acetic acid (or) zinc ...
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Best drying agent for ozone?

For cleaning purposes I do bubble ozone trough $\ce{H2O}$. However the ozone gas is moist then, but I need it as dry as possible. I intended to use silica gel as drying agent. However the orange ...
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93 views

Ozonolysis Reaction

Why does the starting compound not need an -OH group? I thought ozonolysis only produced carbonyls?
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545 views

What is the Lewis structure of Ozonide ion? [closed]

What will be the Lewis structure of the ozonide ion, including formal charges? Do all oxygen atoms have filled octate?
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1answer
100 views

How long does it take to saturate H2O with O3 [closed]

Let’s assume I have one liter of distilled $\ce{H2O}$ in an stainless steel container – from the bottom side of the container I do bubble ozone trough the $\ce{H2O}$. Of cause it is not pure O3, so ...
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1answer
114 views

How to remove nitrose gasses from ozone gas mixture?

I produce ozone gas with an ozone generator based on corona discharge principle. These kind of ozone generators have the disadvantage that if $\ce{N2}$ is present, a bit of $\ce{NO}$ and $\ce{NO2}$ ...
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1answer
2k views

Do plasma globes generate ozone?

My kids and I were playing with a small plasma globe like this: After touching it we all noted a faint smell like that created by other high voltage static discharges, which I always understood to be ...
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2answers
637 views

Calculate ozone layer thickness at a given temperature and pressure [closed]

The ozone concentration in the upper atmosphere averages $\pu{3.0 \times 10^13 molecules per cm3}$ in a region between $15$ and $\pu{35 km}$ high, at an average pressure of $\pu{0.001 atm}$ and ...
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161 views

How does Ozone disinfect water? [closed]

How does ozone remove the impurities in water? I know that there is a process which some European countries use water purification systems based on ozone. It would be beneficial if you could provide ...
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Decomposition speed of ozone [closed]

Elementary reactions of decomposition of ozone with chlorine are as follows (substance with $^*$ is reaction intermediate): \begin{align} \ce{Cl2 + O3 &-> ClO^* + ClO2^*}\tag{1}\\ \ce{ClO2^* +...
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Why does ozone disproportionate on reaction with potassium iodide?

In this redox reaction, iodide ion is oxidized to iodine and ozone reduces to hydroxide ion. $$\ce{2KI + O3 + H2O -> I2 + O2 + 2KOH}$$ This seems like a redox reaction since iodide ion is getting ...
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1answer
124 views

What Would Hypochlorite Ions Prefer to React with, Hydrogen Ions or Ozone?

If I had a box that had inside it a UV light an equal quantity of ozone ($\ce{O3}$), and $\ce{H3O+}$, which would be broken down because of the UV light to $\ce{O}$, and $\ce{O2}$, as well as $\ce{H2O}...
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119 views

Could stabilized aqueous ozone be bottled to prevent half life/sanitization window?

Could stabilized aqueous ozone be bottled to prevent half life/sanitization window? Typically upon creating stabilized aqueous ozone, it has a shelf life and a sanitization window of 24 hours from ...
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1answer
48 views

How can I measure amount of ozone byproduct coming out of hydroxyl generator

A Hydroxyl generator releases hydroxyl radicals into the air to neutralize odors and kill mold. Most hydroxyl generators also release some amount of ozone as a byproduct. How much ozone is released ...
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Steady-state approximation for the destruction of ozone

As a personal problem, I am trying to find a rate law for the reaction $\ce{3 O2 -> 2 O3}$ using the steady-state approximation. The elementary reactions are, \eqref{eq:equilib} (forward rate ...
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1answer
655 views

Why is it that only ozone absorbs UV radiation?

I know the mechanism of how ozone absorbs UV but why is it that no other molecules do this? Is there any special reason? PS: If I'm mistaken and there are other molecules that can absorb UV please ...
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160 views

Ozonated oil Mixed with water.

I wish to emulsify ozonated oil with water and other ingredients to make a cream. Will mixing the ozone oil and water together with an emulsifier lessen the potency of the ozone oil as an oxidant? ...
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Is it a good idea to build a small scale ozone AOP reactor in my garage?

I have some interesting findings from my work (no conflict of interest), and I have been thinking to build an ozone lab in my garage to verify my ideas. What safety issues should I be aware of? The ...
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347 views

Reaction mechanism for ozonolysis

I have been trying to understand the reaction mechanism for ozonolysis but I am not able to understand what happens after the intermediate trioxolane is formed. I have searched online but didn't ...
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2answers
4k views

Balancing the reaction equation for the oxidation of lead(II) sulfide with ozone

While I was reading about the chemical reactions of ozone, I came across this reaction. $$\ce{PbS + 4O3 -> PbSO4 + 4O2}$$ Though the reaction seems well balanced, but when I attempted to balance ...
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1answer
1k views

Do swimming pools deplete the ozone?

I believe that most people know that CFCs deplete the ozone... as does free chlorine. I have read that pool chlorine is not a factor because, it is "rapidly converted to forms that dissolve in water ...
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Why is O2 (Oxygen) colorless and odorless while O3 (Ozone) is a pale blue gas with a distinctively pungent smell?

Why does adding one more oxygen molecule to the bond make it smelly and have color?!
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Ozone depletion distribution [closed]

I am working with ozone measurements from two different sites (one rural and one urban). I am looking at the distribution of hourly averaged concentrations in air. The first figure shows the ozone ...
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1answer
140 views

Value of mixing ratio and rate constant in Chapman mechanisn

In the Chapman mechanism (which tells about the activities of ozone in the stratosphere), there is a equation for the lifetime ($\tau_{\ce{O}}$) of an oxygen atom, $\ce{O}$ against conversion to ozone,...
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573 views

The chlorofluorocarbon reaction in the lab?

The putative reason for banning Freon and its class of chemical (chlorofluorocarbons) is that they will rise to the top of the atmosphere, to the ozone layer and "catalyze" the reduction of ozone to ...
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Lone pair and dipole moment of ozone

(This is a question similar to this and this, but none of the answers to those two questions answer my question.) I've seen many places explain the dipole moment of ozone from the formal charges of ...
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1answer
1k views

Why does ozone have such a large solubility in water?

At $25~\mathrm{^\circ C}$, the solubility of ozone is $109~\mathrm{mg~L^{-1}}$. This is $13$ times higher than the solubility of diatomic oxygen. What causes this?
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670 views

What are all products of an ozonolysis of alkenes using zinc and water?

I'm studying ozonolysis reactions in alkenes, and saw that in one of them there is the formation of $\ce{H2O2}$ (Can anyone explain from where?) that I presumed that reacts with $\ce{Zn}$, one of the ...
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Why does ozone reduce to oxygen?

The O's in ozone and in dioxygen all have oxidation states of 0. If this is the case, why is ozone considered to be reduced to form dioxygen (since there's no change in oxidation state)? Would the ...
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652 views

Resonance in ozone and benzene [duplicate]

In inorganic chemistry, I learnt that stability of some atoms like ozone cannot be explained by one structure alone and hence the hybrid of possible structures is taken and assumed to be the structure ...
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2answers
3k views

Would it be correct to say that ozone is an element?

My level of chemistry knowledge is restricted to that which is given at high school level. I was tought that an element is a substance that consists of only one type of atoms, meaning the number of ...
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12k views

What property allows ozone to absorb uv light

Why can ozone act as a barrier of UV light, so that we don't get irradiated by the sun's energy, and not any old molecule? In a recent exam I sat, one of the questions was "Name one physical property ...
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877 views

Why is sulfur dioxide more stable to UV radiation than ozone?

Ozone readily decomposes when impacted by UV radiation. Sulfur dioxide, having the same bond structure and valence electrons in each atom as ozone, is much more stable. Would someone please help ...
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259 views

POCP: How many ozone molecules can be created by one ethene molecule?

One ethane molecule can create two molecules of ozone, one ethanol molecule can create one molecule of ozone: In the following table the POCP is twice as high for ethene than for propane: From this ...
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878 views

Difference in ozonolysis reagents

What is the difference when following up ozonolysis with DMS (dimethyl sulfide), Zn/water, or just water? Or is there really no substantial difference at all? In my textbook, the alkenes section uses ...