Which of the following are not acids?
CH₃COO...

Question

Which of the following are not acids?

CH₃COOH, CO₂ , HNO₂ , HCOOH, CCl₄

Accepted Answer

Welcome back, everyone. Which of the structures given below are not assets. We're given five structures. The first one is C H three, C H two, C H two coo H. The second one is C 03 with a two negative charge. The third one is H N 03. The fourth one is C six H five coo H and the fifth one is C B R O C B R four. So before we begin this problem, we have to recall the Ronstadt Lori theory, according to the theory, acids are brought on donors, not all of the hyen atoms are acidic, only the hyen atoms that are attached to electron negative atoms might be acidic. So for the purpose of this problem, we have to draw the structures corresponding to the given molecular formulas. Starting with the first one, we have three C two C two. That's a propal group which is bonded to coo H. So we can start drawing coo H that will be our functional group and we're going to bond a propal substituent. So we have 12, we carbon atoms. That'll be our first one. In addition to that, we have C O W-2 negative that would be carbonate. We're going to draw carbon bonded to three oxygen atoms. We have to recall that one of them is double bonded T oxygens are single bonded in each of the two single bonded oxygen atoms has a negative charge. Of course, there's stress and stabilization, but we don't need to worry about that. Now, we arrive at H N 03, we can draw nitrogen which is bonded to three oxygen atoms. One of the auction items is double bonded. Another oxygen atom contains hygiene attached to it. And the final oxygen atom has a formal negative charge. Nitrogen has a formal positive charge because it has four bombs. In addition to that, we have our fennel group C six H five. So let's go ahead and throw the benzene wang and then we are attaching coo H to the ring. And the fifth structure is C B R four. So we have carbon bonded to four bromine atoms. Let's analyze each structure starting with the first one. We understand that the given structure is actually Beano acid. As the name suggests, it must be an acid. And the reason for that is simply because it has a carboxylic acid functional group. Coo H we know that whenever it comes to the carboxylic acid functional group, coo H the O H bond is significantly polarized, right, we have a dial moment from hydrogen to oxygen. And because the hydrogen atom is bonded to a significantly electron oxygen atom, the bond is strongly polarized. So we can release hyen into a solution in the form of an acidic proton because the carboxylate anion is and resonant stabilized and quite stable. So definitely the first structure is an asset due to the fact that it has a carboxylic acid group. Now going to carbonate, it has no hydrogen atoms at all. So we cannot even consider protons and acidic protons specifically because there are no hydrogens. According to the Bronx theory, we cannot consider carbonate to be an acid. So let's go ahead and label C 032 negative. As one of our answers, the carbonate anion is not an acid because it doesn't even have hydrogen bonded to either carbon or oxygen. Right. However, if we bond hyen to one of the oxygen atoms, it can become an acid because we will have an acidic proton bonded to oxygen. For example, carbonic acid H two C 03, where we have two hydrogen atoms bonded to each oxygen and those hydrogen atoms will become acidic because they will be bonded to oxygen atoms. So the bond will be significantly poer moving on to H N L three, we have one hydrogen which is bonded to oxygen. So same thing, right, we have oxygen hydrogen bond, which is significantly polarized towards oxygen. And therefore the hydrogen atom is acidic, it can be released into a solution in a form of a proton. Besides H N three is called nitric acid. So it's the same reason because the hydrogen atom is attached to an electron negative oxygen atom. So the bond is polarized and there is an acidic proton bonded to oxygen. So, nitric acid is an acid, then we are moving on to C six H five coo H which is Benzo casa. Just as the name suggests, it must be an asset. And similarly to the first structure, it has a carboxylic acid group coo H. And due to the presence of that carboxylic acid functional group, it is an acid once again because there's a hydrogen atom bond to an electron oxygen atom. And finally, we have C B R four which is tetra bromo methane because there are no hydrogens, let's actually write it down in blue, there are no hydrogen atoms. And due to that reason, according to the Bronx theory, it cannot be an acid, right? Because there are no acidic hygienes since there are no hygienes at all. So we are going to label C B R four as our as our second answer. So given the five structures, we can conclude that among them, there are two structures that are not assets and those are the carbonate and iron and tetra bromo methane. Due to the fact that none of them has hydrogens specifically, if we don't have hydrogens, we cannot even consider acidic hydrogens. So simply looking at the two structures, we understand that if they don't have hydrogens, they cannot even be considered acids. However, if we have hydrogens present, we always want to make sure that they are acidic. In other words, that they're bonded to electron atoms just as we had for beet acid, nitric acid and benzo acid, the three hydrogen atoms were bonded to the electron oxygen atom making the hydrogens acidic. So our final answer would be carbonate and tetro bromo methane, those are not acids. Thank you for watching. And I hope to see you in the next video.

Which of the following are not acids?
CH₃COOH, CO₂ , HNO₂ , HCOOH, CCl₄

Key Concepts

Acids and Their Properties

Brønsted-Lowry Acid-Base Theory

Non-Acidic Compounds

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