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JEE Exam » JEE Study Material » Chemistry » Cations

Cations

This article introduces you with cations, about the formation of cation, carbocation, cation example, and tropylium cation.

Table of Content
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What are cations in simple words?

Cations are regarded as charged ions. Upon losing electrons, they are formed indeed. However, they lose one or more electrons and do not lose any protons. That is why; they hold a net positive charge. Some prominent examples are-calcium, potassium, and hydrogen. Cations are ions that come up with a net positive charge, including silver, hydronium, and ammonium. Cations are called ions which are positively charged.

How are they established?

Have you been contemplating how cations are established? The water holds high concentrations of minerals that colour clothes, create deposits on bathtubs and water heaters, and create issues following soap foaming entirely. 

This issue happens because of a reason called “hard water.” Do you know that ions can create various problems in the water? Ion is known for exchanging resins to eradicate these minerals and clean up the water.

While practising chemistry or physics, you would come across the critical term ion, which belongs to two things called “cation” and “anion.” An ion is a particle that comes up with an electrical charge. So if an ion is charged negatively, it is essential to understand that it would be called an anion. But in case it is charged positively, then the cation term will be used.

About the cation formation 

Cations are regarded as the positive ion created by the loss of 1 or many electrons. We are talking about the highly commonly established Cations of the representative elements, which are those involved in losing all sorts of valence electrons. 

They consider the alkali metal sodium (Na). It comes up with one valence electron following the third principal energy level. The sodium ion comes with an octet of electrons rights from the 2nd main energy level if an electron is lost. 

How different cations and anions are from each other 

The significant difference between these two key terms is because of their charge. However, talking about to vary in direction holds an incredible impact on how these two key terms behave and react indeed. 

Have you been wondering about the cation example? The electrolysis process can help a lot to understand this in this context. It involves an electric current passing through the material and creating a chemical reaction. Applying an electric current passes through a cloth and produces a chemical reaction. 

The best thing is that positively charged cations are pretty attracted towards a negatively charged electrode known as a cathode. Here, it needs to mention that anions are attracted towards a positively charged electrode known as an anode. Following chemistry, cations are indicated with a high plus sign (+). Anions are characterized by a minus sign (-) following the number of symbols indicating the number of electrons lost or gained. To put it in accessible ways, the symbols Na + and Ca + tell cations when it comes to CI- indicating towards an anion.

Carbocation in simple words 

To put it in simple words, a carbocation is regarded as an ion following a positively-charged carbon atom. Following the most straightforward examples, there are many CH3+, methanium C2H5+ ,ethanium .Here, it is needed to mention that some carbocations probably come up with two or more positive charges. A carbocation is an ion following a positively charged carbon atom. If you want to go with the easiest and simplest examples, there are many, including methenium CH3+, and so on. 

The different carbocations are introduced based on the carbon groups bonded to the carbon. The carbocation can genuinely be regarded as the primary, methyl, secondary, or tertiary, following the basis of how many carbon atoms are considered to it. If no carbon is associated with the carbon following the positive charge, it is regarded as methyl carbocation. If 1, 2, or 3 carbon is associated with the carbon following the positive charge, it is regarded as the primary carbocation, tertiary carbocation, and secondary carbocation.

Firstly, it needs to be mentioned that tropylium cation is indeed aromatic. It is not only because of its planner-related property but also because it comes up with six π-electrons (4n+2, where n=1). 

Tropylium Cation: What Is the Formula? 

Tropylium cation belongs to organic chemistry. Therefore, the tropylium ion is also known as cycloheptatrienyl cation. To put it in simple words, it is an aromatic category following the [C7 H7]+ formula. This name comes from the molecule tropine coming from what cycloheptatriene was synthesised firstly in 1881. 

Salts of tropylium are genuinely stable and, therefore, with nucleophiles of moderate strength such as tropylium tetrafluoroborate and tropylium bromide. Tropylium cation is all about bromide and chloride salts which can genuinely be made from cycloheptatriene and bromine or phosphorus pentachloride accordingly.  

Here, it needs to be mentioned that it is a regular heptagonal planar, cyclic ion. It came up with six π-electrons which accomplished Huckel’s rule of aromaticity indeed. It can genuinely coordinate in the form of ligand to metal atoms. The unique structure shown is regarded as an amalgamation of a total number of 7 resonance contributors in which each carbon atom holds a highly positive charge.

Conclusion 

In short, it could be said that cations are positively-charged ions. These atoms or groups of atoms truly have several protons than electrons because of having lost one or more electrons. Anions are negatively-charged ions. Cations are regarded as positive ions while anions are regarded as negative ions. We hope these cation examples have helped you understand it in a better way.

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