The Lewis structure for carbonic acid (formed when CO2 dissolves in water) is usually given as Ö: H-O- -O-H What is wrong with the following structures? a) H-O b) Your answer is partially correct. Carbon nearly always makes single Additionally, the formal charge on the carbon atom is structure should have 8 c) :O: eTextbook and Media :O: H-O=C-Ö-H Hint :Ö: H-O=C=0-H 2 The formal charge on the oxygen atom at the left and bonded to the hydrogen is since it is the most electronegative element in the molecule. Carbon rarely Hint bonds and this structure has only makes more than double 8 electrons but there are 8 bonds. single bond . Also, there are too many electrons. Th electrons shown. which is unlikely Assistance Used Count the number of electrons in the accurate structure given in the question header. Calculate the formal charge on atoms.
Formal Charges
Formal charges have an important role in organic chemistry since this concept helps us to know whether an atom in a molecule is neutral/bears a positive or negative charge. Even if some molecules are neutral, the atoms within that molecule need not be neutral atoms.
Polarity Of Water
In simple chemical terms, polarity refers to the separation of charges in a chemical species leading into formation of two polar ends which are positively charged end and negatively charged end. Polarity in any molecule occurs due to the differences in the electronegativities of the bonded atoms. Water, as we all know has two hydrogen atoms bonded to an oxygen atom. As oxygen is more electronegative than hydrogen thus, there exists polarity in the bonds which is why water is known as a polar solvent.
Valence Bond Theory Vbt
Valence bond theory (VBT) in simple terms explains how individual atomic orbitals with an unpaired electron each, come close to each other and overlap to form a molecular orbital giving a covalent bond. It gives a quantum mechanical approach to the formation of covalent bonds with the help of wavefunctions using attractive and repulsive energies when two atoms are brought from infinity to their internuclear distance.
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