Which of the following was s the correct electron dot of HF
Answers
Hydrogen fluoride is a colorless liquid or a gaseous compound having the chemical formula HF. It tends to dissolve in water and the colorless aqueous solution is known as hydrofluoric acid.
It has a melting point of -118.50 F and a boiling point of about 670 F.
HF has a molar mass of 20.0064 g/mol and a density of 1.15 g/litre as a gas at 250 C.
HF has a wide range of applications. It acts as a precursor to the halogen fluorine via electrolysis procedure. Other than this, it also acts as the precursor of several metal fluorides like aluminum fluoride and uranium hexafluoride.
Anhydrous HF has catalyzing properties and is hence used in the process of petroleum alkylation to increase the octane number of petroleum. Also, hydrogen fluoride can be used to manufacture herbicides, fluorescent light bulbs, refrigerants, and so on.
Hydrogen fluoride gas is dangerous and aqueous HF acid is corrosive and toxic.
The below reaction provides us the procedure of formation of HF:
CaF2 + H2SO4 ——–> CaSO4 + 2HF (endothermic reaction)
HF Lewis Structure
Chemical bonding is the study of atomic attraction that results in the formation of new products. The science behind the formation of chemical bonds helps us understand several chemical and physical properties exhibited by different molecules and compounds.
To learn the nature of bonding inside a molecule of HF, we will first understand the concept of Lewis Structure so that we can draw the correct diagram.
Lewis Structure gives a 2-dimensional sketch representing the distribution of electrons among atoms inside a molecule.
Here, we will talk about the valence electrons i.e. the electrons in the outermost shell of the atom which take part in bonding.
Let us discuss the step-by-step procedure to draw the Lewis Structure diagram for an HF molecule:
Step 1: We have to first count the total number of valence electrons inside a single hydrogen fluoride molecule.
HF has one atom of hydrogen and one atom of fluorine.
Hydrogen belongs to period 1 and has 1 valence electron whereas Fluorine belongs to period 17(group of halogens) and therefore has 7 valence electrons. We can check the atomic number from the periodic table to confirm the valence electron number.
Explanation: