What is the pOH of a 0.100 M hypochlorous acid (HCIO) aqueous solution with pKa = 7.456A 4.73 B. 5.15C. 8.85 D. 9.77...

Calculate the pOH value corresponding to each of the pH values listed, and tell whether each solution is acidic or basic.
a. $\mathrm{pH}=9.78 \qquad$ c. $\mathrm{pH}=2.79$
b. $\mathrm{pH}=4.01 \qquad$ d. $\mathrm{pH}=11.21$

In this question that consisting off story Barthes offers bar that separation off high drop sign is similar to the concentration off the strong, based off only one way. So it will be over Boeing 66 Mohler So now we can calculate the value off B O. H, which equal negative logs a concentration off the A wage so it will be one going Togami and so the value off pH will be 40 negative the value off P o edge. So it will be 12 going the A to similarly in the B. The concentration off H negative is equals a concentration off a strong bees off Mona or H negative. So it will be 5.43 muller. And so the value off the people edge will be negative logs a concentration. So it will be all Boeing 73 And so the value off BH, which equal 14 negative the value off people which so it will be 13 points to seven that last one. See, here's a concentration off. All H negative will be equal the concentration off the strong bees. Oh, Boeing 74 times by two. Because each strong days containing toe moon off hydroxide. So the concentration off upside total will be one point for a muehler. So now the value off the O. H will be negative logs of concentration. So it will be lowballing 17 and finally is a value off. Be. Age will be equal certain going a three. Thank you.

This is Chapter 18 Question 28. So it's looking for the pH and the P O. H. For there is different concentrations of proton and hydroxide. So for part A, it tells us that our hydroxide concentration is equal to, um oh 3.3 times tending to your fifth, which then allows us to find the p. O. H. Because we can say that the P. O. H. Is equal to the negative log of the O. H minus concentration, which is just the native log of 3.3 times tender. Then I get 1/5 which is equal to 4.48 too significant to decimal places in the p. O. H. Because you have two significant figures in your concentration, which then means that the pH is equal to, um, there was all of this equation, which is 14 is equal the pH plus the p O. H. So you kind of P H is equal to 14 minus the P O. H. So 14 minus four point for eight is equal to 9.52 So there's your P O. H. Andrew Ph again two decimal places because there's two significant figures in the initial ah question. So for Part B would do the same procedure except in reverse. So for Part B, it tells you that the proton concentration is equal in nine point five times, 10 to the negative third. So at this point, we just say that the pH is equal to the negative log of 9.5 times 10 to the negative third cause it's just equal that make a log of the proton concentration, which would give you 2.0, too, and two decimal places. Because there's two significant figures, then we know that it's 14 is equal to the pH Plus the p ohh, which will give you the P O. H. Is equal to 14 minus two ph or 14 minus 2.0, too, which is equal to 11.98 two decimal places because you two significant figures to start

For part A. If we know the hydroxide concentration, we can calculate the p o. H by taking the negative log of the hydroxide concentration, and we get 4.48 Then, when we have the P. O. H, we subtracted from 14 to get pH at 9.52 If we know the hydrogen ion concentration at 0.95 will take the negative log of that to get a pH of 2.2 and then subtract that from 14 to get P O. H at 12.98

We have option e ej three Who positive equals 1.7 in tow. Henry Stupor minus eight And we have the formula for P H is equal to negative. Log off. It's 30 positive. That is a positive substituting in the values we have. P H equals 7.77 but we know that be off bitch plus which is equal to 14 So we can do to my p which as 14 minus 7.77 equals 6.23 Option B Again we have the value. It's 30 for the tip equals 1.0 in tow, 10 days to par minus seven and using the GH formula using the pH form negative log off each positive that is, each tree o negative. It's to you for the deal equal soon so we know B h plus b which is it going to? 14 Substituting in the values we have be wedge equals 14 minus seven equal seven Ocean sea. We have EJ portrait of concentration as EJ three o positive equals to appoint toe into 10 days to poor minus six. So be it is a go too negative Log off h 30 positive substituting in the values. We have a beach as 5.66 We know B H plus B, which is equal to 14 be, which equals 14 minus 5.66 The beauty. Well, you don't know, Toby 8.34