4

Cryetol Violet] Wmol Dlua Ecythrosin 8 24 Dinarophonal Bromphond Blua Bromoctesol Groon Mothyl Red Etiochrore* Brack / Bro mnocratol Purpla Avorn Bromthymo Bluo Pha...

Question

Cryetol Violet] Wmol Dlua Ecythrosin 8 24 Dinarophonal Bromphond Blua Bromoctesol Groon Mothyl Red Etiochrore* Brack / Bro mnocratol Purpla Avorn Bromthymo Bluo Phadol Rod m Nitrophunal 0 Ctaxolphthalui enolamithal Thmolahiralu Q] Akzarn yolonWhichindlicator would be best for detecting the equivalerk e polnt of a titrationof 10 MHNOz with NaOH titrant crysealvlolet erythrosin p bromthyirol blue thymnolpltlalelu alizarin yellow

Cryetol Violet] Wmol Dlua Ecythrosin 8 24 Dinarophonal Bromphond Blua Bromoctesol Groon Mothyl Red Etiochrore* Brack / Bro mnocratol Purpla Avorn Bromthymo Bluo Phadol Rod m Nitrophunal 0 Ctaxolphthalui enolamithal Thmolahiralu Q] Akzarn yolon Whichindlicator would be best for detecting the equivalerk e polnt of a titrationof 10 MHNOz with NaOH titrant crysealvlolet erythrosin p bromthyirol blue thymnolpltlalelu alizarin yellow



Answers

Two drops of indicator HIn $\left(K_{2}=1.0 \times 10^{-9}\right),$ where HIn is yellow and In - is blue, are placed in 100.0 $\mathrm{mL}$ of 0.10 $\mathrm{MCl}$ .
a. What color is the solution initially?
b. The solution is titrated with 0.10$M$ NaOH. At what pH will the color change (yellow to greenish yellow) occur?
c. What color will the solution be after 200.0 $\mathrm{mL}$ NaOH has been added?

If we have a an indicator with a K A of one times 10 to the negative nine, where the protein ated form is yellow in the deep rooted form is blue. If we have an acidic solution, then it's going to take on the color of yellow because the indicator is going to exist in the protein ated form. The P K of the indicator is going to be nine, and the color begins to change at one pH. Unit below nine and stops changing at one pH. Unit above nine. So the transition range then is going to be eight ph 8 to 10. So it'll begin to change a Ph. Eight. Once we finish the Thai tray shin and the solution is basic, then the indicator will exist in the deep protein ated form, and it will appear blue.

So this problem wants us to choose an indicator for the solution of of the previous problem in that tie Trey Asian. And in order to solve this problem, you obviously have to know the solution to that. And so we know that the pH at the equivalents point is nine 0.75 point 75 so we can knock out bro Mo bro most. I'm all blue because that has a that changes color at a pH between 0.6 and 7.6. And we can get this rid of this yellow one because it's between 10.1 and 12 and this time alone following. Not exactly sure. I'll just say it. That's right in the middle of this, 9.75 So that is the correct indicator to use.

Uh, the in this question that K for indicator is he called the 2.0 multiplied by 10 to department six. Color off H n. Is green color off and his dad What? So at equivalent point, we will calculate this. Therefore, the solution you indicator equal toe 2.0, multiplied by 10 to the power minus six. A little kevin is green and color off a negative is Uh huh. So now, at equivalent point heard the Cubillan point be at equal Do mhm. Mm hmm. Which will be equal to minus law. Mhm equal toe minus law. Putting the value that is 2.0 multiplied by 10 to the power minus six. And from here we get the value of PHS bye 0.69 which is approx 25.70 No. Does the mhm indicator built change color ad pH equal to 5%. 0 or not as the This The indicator will change color at Pierre physical to five point someone's you. So this is the solution off answer. In this case, a of indicator is 2.0, multiplied by 10. 3 parts minus six and the color off on is green. Color off in negative is rare and add the equivalent point feared is equal to P. K. So here, by solving this, we get the value PHS five or 69 or 5.70 Does the indicator will change color at Ph Ekotto's endpoint? Well, sorry. Ph go to 5.70 So this is the solution of guns.


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