This tells you that a potassium atom has 1 electron in its outermost shell, i. In order to complete its octet , a potassium atom must lose that valence electron. Chlorine, "Cl" , is located in group 17 of the Periodic Table. This tells you that a chlorine atom has 7 electrons in its outermost shell. In order to complete its octet, a chlorine atom must gain 1 valence electron. Now, when potassium reacts with chlorine, the former loses its valence electron and the latter takes it.
The two resulting ions, i. Stefan V. It has a melting point of C and a boiling point of C. We have a redox reaction occurring between KCl and Na to get metal potassium which is then obtained via distillation.
Potassium Chloride has a lot of applications in our day-to-day lives. It is used to treat low blood pressure and therefore has medicinal value. Also, it is used to manufacture two potash fertilizers: Potassium Chloride and Potassium Sulphate.
Other than this, it is used for soap manufacturing, food processing, anti-freezing agents, welding, soldering as well as a source of beta radiation for calibration purposes.
For understanding the nature of chemical bonding inside any molecule, we need to have an idea about the constituent atoms and the type of bond formation. Drawing a probable Lewis Structure gives us a clear picture of a 2D molecular composition along with electron dots and bond formation. Despite its few limitations, the initial step towards deciphering chemical bonding is via Lewis Structure.
Valence electrons refer to the electrons present in the outermost shell of the element which determines the valency of an atom. We can calculate the valence electron number of an element from the periodic table with the help of its atomic number value. Potassium belongs to group 1 and has 1 valence electron as per the periodic table.
On the other hand, Chlorine belongs to the group of halogens in group 17 and has a valency of 7. Now, before we draw the atomic elements and the electrons surrounding them, we must note that KCl is an ionic compound i. In the case of covalent bond formation as in NO, we found out that two valence electrons are shared to form one bond. In ionic bonds, electrons will be transferred for bond formation.
In this diagram, we can identify the atomic symbols for the constituent elements inside a potassium chloride molecule. Octet rule : The elements present in group 1 to group 17 i. For example, Carbon tends to have an octet configuration to have the Neon configuration and Silicon tends to have that of Argon. So, if we look at our sketch, we can find out that the Chlorine atom is one short of achieving the octet however K has only one valence electron.
For both the elements to have eight valence electrons, Potassium will lose its electron and transfer it to chlorine. The electronic configuration of K which is 1s2 2s2 2p6 3s2 3p6 4s1 now becomes 1s2 2s2 2p6 3s2 3p6 or [Ar].
And that of Cl which is 1s2 2s2 2p5 now becomes 1s2 2s2 2p6 or [Ne]. When we talk about covalent compounds, we decipher the molecular geometry from the Lewis Structure with the help of VSEPR theory that deals with lone pairs and bond pairs of electrons. Out of all the elements, fluorine is the most electronegative, with a value of 4 while cesium and francium are considered the least electronegative elements, with a value of 0. Electronegativity decreases from top to bottom in a column and right to left in a row in the periodic table.
However, the overall trend of electronegativity is diagonal i. KCl has antihypertensive effects and is used as a remedy for treating hypotension where it is administered in the patient orally or intravenously to elevate low blood pressure. It is also used as a nutritional supplement to prevent hypokalemia. Potassium chloride is also sometimes used as a substitute for common salt i. Sodium Chloride or is mixed with it to form low sodium salts.
Other than these Potassium Chloride is also used in the manufacturing of soap, mixed with animal feeds to enhance milk production in dairy animals, as a completion fluid in petroleum and natural gas operations, in glass manufacturing industries, etc. It is also used in labs as calibration standards for measuring the electrical conductivity of solutions. November 14, November 13, November 13, November 13, Your email address will not be published.
Save my name, email, and website in this browser for the next time I comment. Skip to content KCl is a metal halide salt with a molecular weight of In this blog, we will study whether KCl is ionic or covalent and its reasons.
Why is KCl Ionic?
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