You are watching: Is ionic or covalent bonds stronger
I simply completed AP chemistry in high school, and also in chemistry it is taught that ionic bonds room strongest. However, mine AP bio friends informed me the in biology, covalent bonds room strongest. Deserve to someone describe why the two classes teach this differently?
Covalent bonding is leading in organic chemistry, but ionic bonds normally have greater dissociation energies. I'm not sure why her friends have actually been led to think that covalent bonds space stronger, together that's normally not true. Certainly much more common in biology, yet being more common clearly doesn't median that they're stronger.
Interestingly, the phenomena which cause covalent and also ionic bonds to form are not mutually exclusive, for this reason actual chemistry bonds have their strength from both pressures simultaneously. As soon as we call something a covalent bond, it means that covalence is the main reason because that the bonding, not that the bond has no ionic character.
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As a chemist i am going to say the method this is taught in biologic is type of right and the way it is teach in chemistry is confusing. Ionic bonds room stronger. That takes more energy to traction the two atoms apart come infinity than it does in a covalent bond. But, the is an energy measured in a vacuum. In the visibility of solvent, such together water, this transforms drastically. This is due to the fact that the 2 atoms in one ionic link (as various other commentators mentioned, over there is no such thing as a purely ionic or covalent bond, that is simply what we contact the extremes of various ends that a continuum) as soon as separated do ions. These ions are massively stabalized by the water molecules v non-covalent interactions. What this method in physical state is that when you break a bond, you no only need to look in ~ the security of the bond, but additionally the stability of the products. When the assets are really stable, over there is a smaller energy difference in between the the bond and also the atoms. So, it is really tough to rest a NaCl shortcut in a vaccuum. It is really easy to do it in water. So in organic contexts, always in water, ionic bonds are more suggestions 보다 bonds-a convenient method of describing ion pairs, and also are thus much much weaker 보다 a covalent bond the doesn't dissociate in the exact same way. However in a vacuum, the ionic shortcut is lot harder come break than a simple covalent interaction.