According to chemistry, ionic bonds space strongest, yet in biology, covalent binding are. How can this be?


You are watching: Are covalent bonds stronger than ionic bonds


I just completed AP chemistry in high school, and also in chemistry the is taught the ionic bonds room strongest. However, mine AP bio friends educated me the in biology, covalent bonds are strongest. Have the right to someone describe why the 2 classes teach this differently?



Covalent bonding is leading in essential chemistry, however ionic bonds generally have higher dissociation energies. I'm not sure why her friends have actually been led to think that covalent bonds are stronger, together that's normally not true. Certainly more common in biology, however being more common clearly doesn't typical that they're stronger.

Interestingly, the phenomena which cause covalent and also ionic bonds to form are no mutually exclusive, so actual chemistry bonds have their stamin from both forces simultaneously. As soon as we speak to something a covalent bond, it means that covalence is the primary reason for the bonding, no that the bond has no ionic character.




See more: 4 Spooky Things That Tell You How Long Does Memory Foam Pillow Last ?

*

As a chemist ns am going come say the means this is teach in biology is type of right and the method it is teach in chemistry is confusing. Ionic bonds are stronger. That takes much more energy to pull the 2 atoms apart come infinity than it does in a covalent bond. But, that is an power measured in a vacuum. In the presence of solvent, such together water, this changes drastically. This is since the 2 atoms in one ionic link (as various other commentators mentioned, there is no such thing as a purely ionic or covalent bond, that is simply what we contact the extremes of various ends the a continuum) when separated make ions. These ions are massively stabalized by the water molecules with non-covalent interactions. What this means in physical state is that once you rest a bond, you not only have to look in ~ the stability of the bond, but likewise the security of the products. Once the assets are really stable, there is a smaller power difference between the the bond and the atoms. So, it is really tough to break a NaCl link in a vaccuum. It is really easy to execute it in water. For this reason in organic contexts, always in water, ionic binding are more suggestions 보다 bonds-a convenient means of explicate ion pairs, and are thus much much weaker 보다 a covalent bond the doesn't dissociate in the very same way. But in a vacuum, the ionic link is lot harder to break 보다 a basic covalent interaction.