What are hydrogen bonds, and how do they form?​​

Video transcript

Hey, everyone. Let's take a look at this question together which of the following statements about hydrogen bonding is true. Is it answer choice. A it is an ionic bond that forms between hydrogen and another element? Answer choice B hydrogen bonds can exist as both intermolecular and intermolecular interactions. Answer choice C it is the weakest among the chemical bonds oro d the strength of this bond is constant in all compounds. Let's work this problem out together to try to figure out which of the following statements about hydrogen bonding is true. So in order to solve this question, we have to recall what we have learned about hydrogen bonding to determine if the following answer choice is true or if it is false. Starting off with answer choice A which says it is an ionic bond that forms between hydrogen and another element. Well, immediately we can identify that this statement is a false statement. So it is incorrect since hydrogen bonding is not an ionic bond. And instead hydrogen bonds are a distinct type of intermolecular forces or IMF involving hydrogen atoms and electron atoms such as oxygen or nitrogen. So answer choice A is incorrect. Next, we have answer choice B which says that hydrogen bonds can exist as both in intermolecular and intermolecular interactions. Well, we already know from answer choice A that hydrogen bonds do exist as intermolecular interactions, which intermolecular interactions exist between different molecules and intra molecular interactions. Our interactions within a single molecule of which those intermolecular interactions within hydrogen bonds are responsible for maintaining that three dimensional structure of molecules such as in protein folding. Therefore, hydrogen bonds can exist as both intermolecular and intermolecular interactions. So answer choice B is a true statement. However, let's double check with answer choices C and D before making our selection, where answer choice C says it is the weakest among the chemical bonds and we can identify that it is not the weakest among chemical bonds. So answer choice C is a false statement and it's incorrect. They are stronger than Vander Waals forces or Dippo dippo interactions even though they are relatively weaker than covalent and ionic bonds. And lastly, answer choice D says the strength of this bond is constant in all compounds which we know is also a false statement. So answer choice D is incorrect since the strength of the bond is not constant and instead the strength varies as it depends on specific atoms and the molecules involved. So answer choice D is incorrect. And answer choice B is the only answer choice that contains a true statement about hydrogen bonding. I hope you found this video to be helpful. Thank you and goodbye.