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How much 10.0 M HNO3 must be added to 1.00 L of abuffer that is 0.0100 M acetic acid and 0.100 M sodium acetate toreduce the pH to 4.70? Answer in mL....

Question

How much 10.0 M HNO3 must be added to 1.00 L of abuffer that is 0.0100 M acetic acid and 0.100 M sodium acetate toreduce the pH to 4.70? Answer in mL.

How much 10.0 M HNO3 must be added to 1.00 L of a buffer that is 0.0100 M acetic acid and 0.100 M sodium acetate to reduce the pH to 4.70? Answer in mL.



Answers

What amount of HCl gas must be added to 1.00 L of a buffer solution that contains [acetic acid] = 2.0 M and [acetate] = 1.0 M in order to produce a solution with pH = 4.00?

So in this video, we're going to be answering question 148 from Dr 17 which asks us what amount of HCL gas must be added toe. One leader of a buffer solution that contains concentration of acetic acid equal the to Mueller and a concentration of Asante equal toe one Moeller in order to produce a solution with pH equals four s. So what happens when we add our HCL gas? So where HCL is going to react with the base of our buffer to form more of the con ticket acid, more of our acetic acid. So our amputate is going to decrease by however much hcl we add, which we're gonna call X and RCT gas. It is going to increase by however much hcl we add, which is X, um so the number of moles of acid that we have that's just too Miller times One leader gives us two moles, so we have two multiples X and the number of miles of acetic acid that we have. That's I mean of acetate that we have. That's just one Moeller times One leader gives us one mole, so we have one more minus x on DSO. We're ready to plug all these in Henderson Hostile Back equations, the usual form of the Henderson Hostile box operation that you're probably most familiar with. His pH is equal to P. K. A close log of in a minus in any age, But you could do a little bit of algebra and rearrange it toe Eisley the in a over in a age, since that's where X is going to be, that's our unknown variable that we're solving for, um, so that's more useful form of the equation. And that's gonna be a time to the pH. Mina's P K is equal toe in a over n a h. So we just played all these quantities into where equation and we have tend to The pH of four minus P. K A 4.8 gives us 0.158 and that's equal to where one minus X, divided by two plus x So one minus X that was our asset. Tate and two plus X thoughts are acetic acid. Then we just saw her ex. So when we get X equals 0.182 moles and that's how many moles of HCL willing to add to this buffer solution to reach our P, a trip for

To calculate the initial ph we use the Henderson Hasselbach equation where ph is equal to P. K. Which is the negative log of the K. Value for acetic acid. At 1.8 times 10 the negative five plus the concentration of the base or the molds of the base divided by the concentration of the acid or the moles of the acid. I'm just going to use moles And we get 479. The new ph then will be equal to Pekka plus the log of the molds of base. We start with minus the moles of base that are consumed. The molds of base consumed will equal the moles of strong acid added. The molds of strong acid added will be its volume and leaders 30 ml. his .03 Leaders multiplied by the concentration of .1 moller. Well then divide by the moles of acid. We start with plus the moles of acid added because every mole of strong acid added will produce a mole of acetic acid from acetate. And we get a ph of 4.76 the ph of water solution 125 million liters two, which 30 million litres of point molar hcl is added will be the negative log of the new hydro knee um concentration. The new hydro knee um concentration will be the moles of hydro knee. Um We have which is the volume. We start with 30 mL or 300.3 leaders multiplied by its concentration, divided by the new volume. The new volume will be 125 mil leaders or 1250.25 liters plus the 30 mL or point oh three leaders that were added And we get 171.

This question say's above. Contains 0.1 Mueller ascetic acid. So we have 0.10 mother, that city can seed and they don't mind 13 muller Syrian my ha sedate much 13 Moller I think I should just protection my mother sodium acetate once is the ph of the buffer. So we know pH His, uh, Piquet lost Log off the sodium Haas. It'd concentration divided by, uh, a city casted concentration. Okay, so once is, uh, K off absentee. Cassie. So the Russian dissociation constant velocity. Cassidy's won't bunch hate time. Stairs to power minus five. Therefore, Piquet is negative. Longer. Damn off. Uh, the 1.8 times terrorist minus by and therefore be kay will be a question. What? Want several full. Therefore, Ph will be a quiz to fall 0.74 lost longer. Dame off. Uh, zero finds 13 divided by 0.1. So that's a log 0.13 was full of myself. So the Ph will be yuk was too three point hate fire, then the next question said, what is the ph of the offer after the petition off 0.2 mole off k o h. So after hot in zero pines zero to mole off what I share my drug side. So how did protection my drugs That will lead to reaction with, uh, a city CASS is So you have C three see a whole page react to its Oyj Minors to produce. Ah, see history, c 00 miners. And, uh um, it's Jewel. So that missing concentration of a city Cassidy decrease where? The concentration of the house, it with interest. So if your heart is there a point there to matloff Keogh age. We have, ah, 1 to 1 more issue for the option. That means 0.2 mole off the hostage when he asked to produce. Ah, they don't point it on two more off the apostates. So we have to surprise fees from the number of more off a city casino. So they have ah, little 0.10 mine us. And then this is, uh, 0.13 boss. So So new concentration. Every 0.1 minus farms there, too. Said it should be the number of more off the acid in custody. Seven points that I hate, and a number of more off the hospital gate in reserve. 0.1 3/4 of bunch, aren't you? There's, you know, finds 15 No. Therefore the pH of the Buffalo will be 4.7 full. Lost. Margarete in all, is there no one's want? Five Divide Advise. You know, 0.0 Hates King. Yeah, for the new P H will be full. Find several for we'll settle 0.27 So that's 5.1 So the next question said Once is a pH of the buffalo have tow her audition off 0.2 more off the tree Cassidy. So then intrigue acid Really after the ah acid ate offer when they hesitate. So we have a series three c o miners lost h waas. It's in produce. See history and it's ah, equally grand reaction. C'est racy or all age. So the concentration of the city a massive tits will decrease by this Haman. So there's gonna be ah, 0.13 minus 0.2 and then the concentration of the city, Cassie, to increase where the summons that is gonna get a 0.1 zero blow 0.2 So this is going to be little lines 11 hole, 40 acetate And these little points want to more. Oh, that's a decosse. Therefore, the new pH with every week was to 4.74 lost. Log off the acetate concentration for a number of more divided by general points. Want you more so these would give us what? So this would give us 4.66 So that's the peach.

Today I m b a question number 36 which talks about a buffer explained. So support me. You would have to look first. One of how many more to reach New Age E. U s new home. So you would have point to Moller terms point or fine leaders, which pierce you. Okay, one moves. Do any wage learning for your city. Cassie, you have 0.175 Wallner turned 0.1 leaders. She was quite. Or 175 moves or we'll see a Gasser balloons. Your page is equal to your contain. It became your ass. It is to divest. So in 4.75 close the long grow your briefs. We're raves run by. We are also funds because all of your anyway, she's gonna rear. Um, since all the only school reactive to subtract for one complaint on one so fine to get you. Yeah, final also fun. And when you do right now, you get your P H is equal to four point 87 Mhm. For part being for part B, you dissolve 1 g of sodium hydroxide. You have to figure out what your page running is. So so there is this Okay? Started. Okay, so you have to correct your one girl into Oh, so 1 g is 40 one Bravo in your wages. 40 g. A new H, one more. Is it going to play to five months? Who's in one? You know, uh, originally, you have only 0.1 most well, any only two in your solution. So after 1 g and dissolved, all all the most in your buffer end up being you stop. So you're Ph will be equal to your p K, which is four point so like


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