Why is ClO2 Different to Chlorine? | Scotmas (2024)

As we all learned in high school chemistry, we can mix two compounds and create a third that bears little resemblance to its parents.

For instance, by mixing two parts of hydrogen gas with one of oxygen – liquid water is the formed. We should not be misled by the fact that chlorine and chlorine dioxide share a word in common. The chemistries of the two compounds are completely different.

Chlorine and chlorine dioxide are both oxidising agents (electron receivers). However, chlorine has the capacity to take in two electrons, whereas chlorine dioxide can absorb five. This means that, mole for mole, ClO2 is 2.6 times more effective than chlorine.

If equal, if not greater importance is the fact that chlorine dioxide will not react with many organic compounds, and as a result ClO2 does not produce environmentally dangerous chlorinated organics. For example; aromatic compounds have carbon atoms arranged in rings and they may have other atoms, such as chlorine, attached to these rings, to form a chlorinated aromatic – a highly toxic compound that persists in the environment long after it is produced.

Chlorine dioxide’s behaviour as an oxidising agent is quite dissimilar. Like ozone, the predominant oxidation reaction mechanism for chlorine dioxide proceeds through a process known as free radical electrophilic (i.e. electron-attracting) abstraction rather than by oxidative substitution or addition (as in chlorinating agents such as chlorine or hypochlorite). This means that chlorinated organic compounds such as THMs and HAAs are not produced as a result of disinfection using chlorine dioxide.

Why is ClO2 Different to Chlorine? | Scotmas (2024)

FAQs

Why is ClO2 Different to Chlorine? | Scotmas? ›

Chlorine and chlorine dioxide

chlorine dioxide
Chlorine dioxide is a chemical compound with the formula ClO2 that exists as yellowish-green gas above 11 °C, a reddish-brown liquid between 11 °C and −59 °C, and as bright orange crystals below −59 °C. It is usually handled as an aqueous solution.
https://en.wikipedia.org › wiki › Chlorine_dioxide
are both oxidising agents (electron receivers). However, chlorine has the capacity to take in two electrons, whereas chlorine dioxide can absorb five. This means that, mole for mole, ClO2 is 2.6 times more effective than chlorine.

Why is ClO2 different to chlorine? ›

Chlorine Dioxide has a higher oxidation capacity, and a lower oxidation strength than most species of chlorine, making it at least 2.6 times more powerful per ppm according to WHO CT values.

What is the difference between chlorite and chloride? ›

Answer and Explanation:

Chloride is the ion generated when a chlorine atom gains an electron. It has the chemical formula Cl-1. Chlorite is a polyatomic ion with the formula ClO2 -1. Two oxygen atoms share electrons with the chlorine atom and the electron arrangement results in a charged particle.

What is the difference between chlorine dioxide and sodium chloride? ›

Chlorine dioxide contains chlorine and oxygen. Sodium chloride contains sodium,chlorine and oxygen. There are also sodium chlorate with more oxygen and sodium perchlorate with still more oxygen.

What is the advantage of using ClO2 rather than cl2 for disinfection? ›

Chlorine dioxide is fast replacing aqueous Cl2, particularly in pulp and paper manufacture, because the reaction of ClO2 with organic materials does not appear to form carcinogenic trihalomethanes (THMs) as side-products and because ClO2 is 10 times more effective as a disinfectant under high chlorine demand.

What is the difference between chlorine and chlorine molecule? ›

Cl' represents one chlorine atom. It is found in nature in diatomic form as a molecule I.E. ,Cl2. 2Cl represents two chlorine atoms as chloride ions ready to take part in a reaction.

What happens when ClO2 reacts with water? ›

Chlorine dioxide is soluble in water and will react rapidly with other compounds. When it reacts in water, chlorine dioxide forms chlorite ion, which is also a very reactive chemical. Because chlorine dioxide is very reactive, it is able to kill bacteria and microorganisms in water.

What is the difference between chlorite and hypochlorite? ›

Sodium hypochlorite can act as a disinfectant and a bleaching agent. Sodium chlorite can be used to make chlorine dioxide (ClO2) by the reaction: 2NaClO2 + Cl2 -> 2ClO2 + 2NaCl, which can be used as a disinfectant or a bleaching agent. Hypochlorite is a ClO- ion whereas chlorite is a ClO2- ion.

What is the difference between chloride and chloride ion? ›

Chlorine is a naturally occurring element with a symbol Cl and atomic number 17. Whereas, Chloride is an ion of chlorine. Basically, when atoms gain or lose electrons, they become ions. Chlorine atoms gain one electron to become a chloride ion (Cl−).

Does chlorite contain chlorine? ›

The chlorite ion is ClO2. A chlorite (compound) is a compound that contains this group, with chlorine in oxidation state +3. Chlorites are also known as salts of chlorous acid.

How long does chlorine dioxide stay in your system? ›

Most administered chlorine dioxide and its metabolites remain in plasma followed by kidneys, lungs, stomach, intestine, liver, and spleen. About 43% of orally administered chlorine dioxide is eliminated in the urine and feces within 72 h.

Can you use chlorine dioxide to purify water? ›

Chlorine dioxide can be effectively used to disinfect drinking water without much alteration of palatability and can also be used to destroy pathogenic microbes, including viruses, bacteria, and fungi from vegetables and fruits.

What are the disadvantages of ClO2? ›

Chlorine dioxide gas is explosive. Chlorine dioxide is a very unstable substance; when it comes in contact with sunlight, it decomposes. During chlorine dioxide production processes, large amounts of chlorine are formed. This is a disadvantage.

What is the use of ClO2? ›

Chlorine dioxide is a gas used in very small quantities to disinfect water. It is a disinfectant similar to bleach and is unsafe when used in large amounts. Chlorine dioxide kills bacteria, viruses, and fungi. Very small amounts are used in public water treatment facilities.

What are the right to uses of ClO2? ›

Uses of ClO2:i It is used for purifying water. ii It is used as a bleaching agent.

Is chlorine dioxide the same as pool chlorine? ›

Chlorine and chlorine dioxide are both oxidizing agents, meaning they remove electrons from other compounds during chemical reactions. But whereas chlorine has the capacity to take in two electrons, chlorine dioxide has the capacity to absorb five in highly acidic environments.

Is chlorine dioxide the same as free chlorine? ›

Because of their fundamentally different chemistries, ClO₂ and Cl react in distinct ways with organic compounds, and as a result generate very different by-products. It's this difference that explains the superior environmental performance of chlorine dioxide in a number of industrial applications.

What is the difference between sodium chlorite and chlorine? ›

Sodium Chlorite is a white powder, which dissolves in water. Chlorine Dioxide is a gas. This gas also dissolves in water to some degree and gives a yellow color. Sodium Chlorite is used to make Chlorine Dioxide in the laboratory.

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