Arrange the solutions in order of increasing acidity.
NaCl, NH4C...

Question

Arrange the solutions in order of increasing acidity. 
NaCl, NH4Cl, NaHCO3, NH4ClO2, NaOH

Accepted Answer

Hey everyone today we're being asked to rank the solutions of the following substances from least to most basic, assuming that the solutions have equal concentrations. So let's jump right into it with the very first one CH three C. O. H. Or acetic acid. So seeding acid as the name implies is an acid. However It doesn't associate completely. It associates into CH three metal group CH three and a carb oxalic acid group C. 00. H. As such. Since it doesn't associate completely it is a weak acid. So that's that. Let's take a look at the next one lithium hydroxide, L. I. O. H. Contrary to acetic acid. This actually dissociates completely in water. It forms L. I. Plus and a drug side since it dissociates completely that means this is a strong base and there's a base due to the presence of the hydroxide strong base. Next up we have sodium hypochlorite or N. A. O. C. L. No, sodium hypochlorite does not dissociate completely. However, it associates into the sodium cat island and the hypochlorite. An eye on now for main group elements our main group metals such as sodium or lithium. If their charges not greater than three plus Then they can be considered neutral. Otherwise if their charge was greater than three plus they would be considered acidic since any plus sodium plus Only has a charge of plus one it is therefore neutral. However for hipAA chloride. Oh cl it is the conjugate base of the weak acid. It is the conjugate base. You know to see be here of hipAA cleric acid. Okay of H. O. C. L. Thus being a conjugate base, it is therefore basic. So since sodium sodium ion is neutral but the type of chloride ion or hyper chloride ion, sorry, is basic. sodium hypochlorite will form a basic solution. However, it won't be as basic as the strong base of lithium hydroxide. I'm going to come back to NH four n. 0 two or ammonium nitrite in a little bit because it requires a little more thought than the rest of them. However, let's take a look at potassium nitrate. Sorry, potassium nitrate K. N. 03. So k. n. 03 does not associate completely but it does associate into K plus and And no -. So similar to sodium hypochlorite. The K. N. 03 or the potassium only has a charge of plus one, which means it is neutral. However, even though n. seems like it should be acidic or sorry, basic. It is actually the conjugate face of a very strong acid. It is the conjugate based CB of a very strong acid nitric acid, HN. Since it completely dissociate as such. Since it is the conjugate base of a very strong acid by nature that means the conjugate base will be neutral. Not basic as such. Since both K plus and nitrate nitrate. Sorry, become neutral ions when dissolved. This would be a neutral salt neutral salt. Finally coming back to ammonium nitrite And H four and 2. Let's write this out. We come into some complications because NH four, one of the ions that it dissociates into is the conjugate acid of the weak base ammonia of weak base ammonia And Nitrite. No two. Sorry, Let's write that again. And or two. or nitrite is the conjugate base of the weak acid nitrous acid, H N 02, the weak acid, Each N 02 as such. NH four plus will be an acidic ion and N 02 minus will be a basic ion. So using experimental data, we can actually use the acid and base dissociation constants K A and K B respectively to determine whether the salt that it will be is more acidic or more basic. So the KB of NH three, the weak acid or sorry, weak base ammonia is Let's write this out. KB is equal to 4.75 Times to the -5. Keep in mind that this is using experimental data that you can probably find on the internet or in your textbooks. Similarly, the K A. Of nitrous acid, HN 02 Is 7.2 times 10 to the -4. Since, since the K A. Is greater than the KB and we can see this because this has a larger exponent in comparison to the 10 to the -5 for the KB of Ammonia. So, since the K A. Is greater than the KB that means this salt salt will be acidic. So this is an acidic salt, however, because it's assault, that means that it is not as acidic as the true acid that is acetic acid right here. So looking back and ordering these unless you use a colored green, for least basic or most acidic. In this case we would have acetic acid followed by ammonium nitrate. Then we would get the neutral salt, potassium nitrate three, followed by the week basic substance, sodium hypochlorite, and finally the most basic would be lithium hydroxide, the strongest base. I hope this helps. And I look forward to seeing you in the next one.

Arrange the solutions in order of increasing acidity. NaCl, NH4Cl, NaHCO3, NH4ClO2, NaOH

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