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14. Use the words 'stronger, weaker, lower or higher' appropriately in the blanks below: Higher the Ka ofan acid; its pKa and the Kb of its conjugate base...

Question

14. Use the words 'stronger, weaker, lower or higher' appropriately in the blanks below: Higher the Ka ofan acid; its pKa and the Kb of its conjugate base _ Higher the Ka ofan acid, the acid; [H+]; its pH andits pOH15. Without doing any calculations, predict which of the following solutions 0.10 M HNOz; Ka 45*10 0.10 M CH,COOH; Ka = L8 x 10 0.10 M HCN; Ka 49x10 10has the lowest pH?becausehas highest pKa?becausehas lowest [OH -]because_

14. Use the words 'stronger, weaker, lower or higher' appropriately in the blanks below: Higher the Ka ofan acid; its pKa and the Kb of its conjugate base _ Higher the Ka ofan acid, the acid; [H+]; its pH and its pOH 15. Without doing any calculations, predict which of the following solutions 0.10 M HNOz; Ka 45*10 0.10 M CH,COOH; Ka = L8 x 10 0.10 M HCN; Ka 49x10 10 has the lowest pH? because has highest pKa? because has lowest [OH -] because_



Answers

Find the pH and percent ionization of a 0.100 M solution of a
weak monoprotic acid having the given Ka values.
a. Ka = 1.0 * 10-5
b. Ka = 1.0 * 10-3
c. Ka = 1.0 * 10-1

Over on. My name is Ali. In this question, we have some off as in and we want to calculate the value of pH in the 1st 1 We must calculate the concentration off each posted, which is is as it is, weak as it's so when we calculate the concentration of H postive for weeks as it we use the relations concentration of each postive equal the root off K eight times by the concentration off these weak ass it so it will be equals the root off 1.8 times by Tim Bower Negative four times by oh boy named four. So it will be equal Eat point Fine times Voight Inborn Negative three Moller. Now we can calculate the value off be edge, which is the value of P. H is equal. Negative logs ease value so it will be equal to the 2nd 1 The concentration off each postive He will be equal the concentration off the strong as it so it will be so boring for a moon er so now we can calculate the value off be age which will be negative. Log these values so it will be equal four or sorry in short calculated Lord. Yeah, it will be equal also. Oh, boring for is the same and the last one if weak as it's so when we calculate the concentration off each postive, it will be equals a room off the value off K off this week as it times my concentration off these weak asset. So it will be equal. One born date Times by Tim Bower. Negative Fine times, boy. Oh, going for. So it will be equal. Two born seven times fighting Bauer Negatives. Three. So now we can calculate the value off BH, which it found its equal to Boyne for seven. We will found the for me that the higher number off Ph is here. Also, all the weak acid used how the concentration is. Oh, Boeing four. But do you tow the value off? Here's a k A small. So the concentration off each poster form it is a small saw. The value off the edge will be higher. Thank you

In this question, we're asked to pick the solution with the greater B itch. In each case, in the first guest, we have to hold a found two different solutions. Violence has a polarity off point on him and has a k A value equal to one times under. Then don't Good, beautiful by the second solution has again a point run Imola charity. But lo que a value which is equal to four times into the negative fight. So in this case, But we have to remember is that the cave value is directly proportional to the hydra on human concentration and the hydro nea Morin concentration is inversely proportional to the beach value. So if something had a greater hydro nia mind concentration, it will have ah, low pH value and vice versa. So in order to figure out which of them has a cradle pH value, we have to choose the bond with the low okay values. And so this is our veena. The second description will have ah, a solution that has a lower I'm sorry, a greater village value. So it's no wonder that partly of this question in thought be the door that in the first case, we have, uh, acid solution with the point burnem more Larry D and it has a peek. A are to be find Zito while in the second guess me again have a acid solution with 0.1 imola parity. But it has a big cave and you, which is greater, and it's equal to 3.5. So what we have to remember is that, um this has to be you. It's wanna be. And, um but we have to remember is that the PKK value is inversely proportional to the K around you, which is directly proportional to the hydro Nia Martin concentration and inversely proportional to the Piotr. So you see that the PKK value is directly proportional to the pH value. And so whichever solution has the greater big event hougan have the greater ph value. So this is the on such of that question In the next part of the question, part C, we are gained all about two different solutions. Run that has a mobile, an itty off minds on em with ah, we cast it on and another one that has a polarity off 10.0 on em with the same the castle. So they have the same weak acid. But two different concentrations in this gaze, the one with the greater the value is going to have a lower concentration. Okay, Is there parte de off this question? The toward about a solution that has a weak acid with the point. Burn him Moulin ity. That's the first solution. And the second solution has, ah similar more clarity going on him. But it has a strong passage. So we know that strong. I said, Well, August, give rise to more hydro in your minds. Come back to you. Guess it in that case, because we know when we have a smaller amount off. Hydro Nia, my ins is when we have the creator b ph value. The answer is this. He has his Toby guess ID with the find one in concentration. And in this section you we asked to come back between a solution off acid it find run in morality, and then, uh, this with 0.0 on Emelec. So, in this case, the pH values we can just write down for the first is going to be equals toe one. Because this is 10 to the negative one foreign vanished into the negative on and that correspond Toby actually off one. And in the second case, Um, so this is Ah, base. This will have a P O. H. Value off to and India. That means it will have a B edge off dress, 14 minus true. So then we see that the base with the lower concentration is the solution that has it greater ph value. The final part of this question. It's rather doing about two solutions. The first that the feelings van you after 6.0 and the second with the P Aurich value off 8.0. So the solution that has a low opiate p or its value is the man that will have a

Mhm. In these questions, there are four assets A. B. C. D. And the ark A. Are given. We have to arrange the acids in order of increasing acid strength from weakest to strongest. And then we have to figure out which acid has the smallest pick A We've had now here if we take a look, C. Has the lowest K. F. Helen see has the lowest get a. Hello. And we know lower the key. A lower the K. M. Hello, We carries the acid Garda. S. It is. So here among A. B. C. D. C is the weakest acid. Then in between A. B and D. We see he has that west. So we'll write the these KsC into 10 to the power minus four. Now between A and B. We see B has that lower cave Peluso B. Is the next one and the lowest K. Helu not lawyers, sorry, highest Gay A. Value A. Has a C. A. Has the highest gave a value. So the strongest asset. So we are ending this one in order of acid strain that is from the weakest and the strongest. Now this is foresee a. Now we have to answer which acid has the smallest PK value. What is pick a negative law K. A. That means smallest speak A. We'll have highest gaming. So smallest became jala means which as it has highest K. That is acid A. E. S. It has the highest K. So A. When happy, lowest big A. As it has highest but move off daily.

In this question were given three images off three week assets ejects its by and Z and we are able to count the number of unassociated acid molecules, number of hydro near my aunts and the number off uh, a minus. Oh. I mean, uh, congregate base barbecues in each as sick. After giving us this information, there are stew rang facets according to the increasing K rallies. So what we have to understand here is that the hydro knee amount concentration is directly proportional to the okay about it. Something that has a high hydro Newman concentration is going to have a high K that so by that logic, we can dio that the I said with with the least amount of height on your minds it checks is the oh biggest asset. Did the Smarr list okay, value Next is going to be each z. And finally the acid with the greatest number of high Donia. My chance is going to be the man with the They just gave value it being the strongest and be there are us do rank these assets according to the increasing PK A values for the Pekka in value. It's going to be inversely proportional to the K A values. So something that has, uh, lower PK that you belong. This, however hi o K about you. By this logic, we can tell that the trend here is going to be the exact opposite off the answer to park a so and to be edge by first. Then I just see. And finally it checks faster, greater speaking, a value corresponding to the, um weakest, as it in part C were asked to rank the conjugated basis off these assets according to their increasing PKB values you might be up to understand is that if something has, ah, a friend Okay, if I knew, it's conjugated base is going to have a lower PKV Valley because the some of these tools is a constant and if minus increasing, the other has to decrease. So according to that logic, we can tell that X minus. Being the strongest base has the smallest speak every value My minus starting line Z mice Z minus comes next and finally by minus has the largest speaking the value corresponding to the because congregate base. In the next part, there are asked to calculate the person's association off checks so the present association can be dick 10 as X minus, which is the congregate base for checks divided by the in Asia. Number off. It checks molecules multiplied by 100 so picked of the currents off thes thesis and said the So what's with those numbers? We can calculate the dissociation percentage for a checks. The number of X minus molecules that we can see in the image is to the number off it checks. Molecules that were present at the beginning is equal to eight. This six currently in the objects acid. And there were two checks molecules that were present at the beginning and now have dissociate so hard to get the It's eight and it's the magic night. This by 100 get 25%. That is the percent association for it checks in the final part of the question. Sorry, he in the final part of the question, um, now asked if they had equal molar amounts off the sodium sauce off each asset and we dissolve that thing. Orta, Which solution would have the highest bureau ridge and the lowest beach? So the highest feel rich we're correspond to the lowest ohr and concentration. So the lowest or China concentration is going to be coming from the weakest base. And we've already established the best chance according to this gender. And we know that my minus, which has the greatest PKV value, is going to be the congregate base that has, um that is the biggest base. So and by there, 30 a. M start off by minus is going to be the, uh, the side that will give rise to the greatest your its value. And if something at the greatest video it's value, it is also going to have the knowest ph value because the village, um, and the beach, if you sum them together, they're going to be a constant. So if one increases start, there has to decrease. So again, it's any lie that has the smallest be its value as well. So anyway, I has bought the largest view, its value and the smallest ph value


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