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The $mathrm{pH}$ of a $0.1 mathrm{M}$ aqueous solution of a weak acid (HA) is 3 . What is its degree of dissociation?(a) $1 %$(b) $10 %$(c) $50 %$(d) $25 %$...

Question

The $mathrm{pH}$ of a $0.1 mathrm{M}$ aqueous solution of a weak acid (HA) is 3 . What is its degree of dissociation?(a) $1 %$(b) $10 %$(c) $50 %$(d) $25 %$

The $mathrm{pH}$ of a $0.1 mathrm{M}$ aqueous solution of a weak acid (HA) is 3 . What is its degree of dissociation? (a) $1 %$ (b) $10 %$ (c) $50 %$ (d) $25 %$



Answers

For each strong acid solution, determine [H3O+], [OH-], and pH.
a. 0.25 M HCl
b. 0.015 M HNO3
c. a solution that is 0.052 M in HBr and 0.020 M in HNO3
d. a solution that is 0.655% HNO3 by mass (Assume a density of
1.01 g>mL for the solution.)

So the pH of the solution is three point to night. So from Ph, you could calculate the proton because calculating the proton concentration, which is tend to the night there's three points too high, equals five point one three times ten to the negative. Forthe Moller. And we know that Kay is age three o plus concentration times a minus concentration divided by H. A. And we could use the approximation this case in a top this three h real plus equals a milers equals the same number. So he used five for one one three times ten to the negative fourth square divided by the A J concentration, which is point one one five more and we've got a value is two point tonight times turn to the nectar of six.

This question is almost exactly same. Tow the previous one. So let etch a B the week monitor erotic asset with initial concentration off 0.100 Where Making an i c e table on DDE The reaction This was ionization constant k A. Substituting in the values we have a value off concentration off age for the divine that is X equals 1.0 in tow tend to a stupid negative three. We know the formula for peaches. Negative. Log off it for the divine Substituting in that value we have a pH at three. We now have to deter mined the percentage off ionization that is equal to the that is equal to the concentration off ionized product that is positive. I divided by the initial reacted, multiplied with 100. Using this, we have percentage off ionization as one person. Same has to be done for option B and option C in auction be the value off excess under the value off ex. Turn out to be 1.0 into 10 days to plan. Negative, too, on the value off pH as too along with the ionization as 10%. Exactly same for auction see the value off X is one into 10 days. Tobar negative one in 10 days to one negative one. From that, we need to determine the pH, which is one that is highly acidic. Now we need to deter mined the percentage off ionization as it's 30 positive, divided by the reactor that is edgy. My deployed with 100 gives me 1.0 in tow. Henry's took one negative one, divided by 0.10 multiplied with 100. Gives me 100% organization. That is auctions. See, EJ A is the most acidic one.

So we want to know the pH of varias nitric acid solutions and nitric acid is a strong electrolyte and a strong acid, so it will dissociate completely. A 0.5 baller nitric acid solution will give a 0.5 Mueller. I'd rhodium ion concentration the actual equilibrium concentration of the H and 030 It's all converted to hide. Roni Um h plus remember, H plus is an abbreviation for the Hydro Nehemiah. So for this solution, the pH is minus the log of 0.5 And so law 005 iss negative 2.3. And so the Ph is 2.3 ups 2.3, and then likewise, for a 0.5 Mueller solution, it's pH will be minus still log of 0.5 and the log of puedo five is negative. 1.3 to the pH is 1.3, and likewise for a 0.5 moller nitric acid solution Hydro Nehemiah and will be 0.5 in the log of 0.5 is negative 0.3, and so the Ph is 0.3 and the pH of a five polar solution of nitric acid has a hydro Nia My on concentration of five Moeller in the log 05 is 0.7.

This problem helped you explore very common equation in a new way. So for so long, we have in Canton eating the pH off solutions we've been plugging in the head. Rhona my on dhe figuring out the pH. But in this case, we actually do not know the concentration off our dona ones. But we do know the pH and here to figure out the concentration of hydrogen rights. The pages four points Island. We are told that it's a weak acid. And since it's an asset, we already know that the had on your mind concentration has to be greater than, um, rid of intent to the woman is, um how do we know this? Well, for the neutralization, the hydrogen atom are in concentration is 10 to the minus seven. So if we have something a sedating it needs, we have more hydrogen ones, so it has to engage them 10 to the minus. Um, if you get about a less than 10 to the minus seven, then you don't that you've made a mistake somewhere, so Ph will find seven negative law off. I don't mind. And you end up with Ah, hi, Jonah Ryan. Concentration off to into 10 to the bath minus five, which is greater intento minus servant. So you have the right answer.


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