Not sure how to solve these. The

[625233]

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Th bolder is the correct answer, just not sure how to get there.

 

[NeuResurgens]

Are these for one of your classes? I've never seen problems like these before.

 

[moemoekyun]

Looks like biochem. Henderson Hasselbach will do it.
ph=pka + log (base)/(acid)
10) 10.5 (pH)= 10.07 (pka for tyrosine to go from -1 charge to -2 charge) log (b/a).
10.5-10.07=.43=log b/a
10^.43=2.69
Should be same for 11.

 

[moemoekyun]

11)6.5=2.34 + log b/a
4.16=log b/a
10^4.16=1.4x10^4
Use to tutor biochem while in school. Surprised I still remember how to do this. If you don't know where I got numbers from, I can explain, but better for you to figure it out.

 

[NeuResurgens]

Oh, interesting. We aren't covering this in my Biochem class, at least not yet..

 

[625233]

11)6.5=2.34 + log b/a
4.16=log b/a
10^4.16=1.4x10^4
Use to tutor biochem while in school. Surprised I still remember how to do this. If you don't know where I got numbers from, I can explain, but better for you to figure it out.

Thanks a ton brother

 

[625233]

Oh, interesting. We aren't covering this in my Biochem class, at least not yet..

These questions are chapter 2/3 material, you sure you didn't cover it?

 

[mehc012]

Just for future reference, SDN doesn't allow homework help. You might be able to get away with it as MCAT prep in the MCAT Q&A subforum, but generally not here.

 

[moemoekyun]

Oh, interesting. We aren't covering this in my Biochem class, at least not yet..

This part I remember being challenging for my class (not me though, I love the math part), to the point the professor spent the whole day lecturing how to do this since about 95% of the class couldn't do it. I remember thinking "I got here at 7 AM for this!"

Thanks a ton brother

NP. I remember getting asked stuff like this 5x a week. Practice makes perfect.

These questions are chapter 2/3 material, you sure you didn't cover it?

My school used the Voet book, and this wasn't till chapter 4 or 5.

 

[moemoekyun]

Just for future reference, SDN doesn't allow homework help. You might be able to get away with it as MCAT prep in the MCAT Q&A subforum, but generally not here.

Whoops. Did not know that. I guess my school's tutoring forum conditioned me to answer a biochem question whenever I see one!

 

[NeuResurgens]

These questions are chapter 2/3 material, you sure you didn't cover it?

Well, we haven't as of yet. I'm not sure if the prof is just doing his own thing or what but we pretty much just covered the amino acid group pKas (didn't do any Henderson-hassalbalch) and now we're in metabolic pathways.

 

[NeuResurgens]

I remember thinking "I got here at 7 AM for this!"

lol, I feel like this a lot in some of my classes. I guess you can get a small nap sometimes

 

[tdubst]

Oh, interesting. We aren't covering this in my Biochem class, at least not yet..

When you do, I suggest getting a strong handle on this. High yield test questions utilize HH.

 

[mehc012]

Whoops. Did not know that. I guess my school's tutoring forum conditioned me to answer a biochem question whenever I see one!

I literally only know that it is a Terms of Service violation from seeing the mods messages when they close threads. They'll certainly call you out for ToS violations, and yet even when actively looking for it, the damn thing is impossible to find.

I really was only posting that to give you a heads up, because frankly, you really have no other way of knowing since the ToS is apparently a ninja page.

 

[moemoekyun]

Well, we haven't as of yet. I'm not sure if the prof is just doing his own thing or what but we pretty much just covered the amino acid group pKas (didn't do any Henderson-hassalbalch) and now we're in metabolic pathways.

Maybe your professor doesn't think it's important or your school puts it in the curriculum. Metabolic pathways weren't covered till biochem 2 at my school.

When you do, I suggest getting a strong handle on this. High yield test questions utilize HH.

This. Also for people going into research, especially with making buffers. Questions like this were worth 5/200 on my tests...

 

[625233]

Just for future reference, SDN doesn't allow homework help. You might be able to get away with it as MCAT prep in the MCAT Q&A subforum, but generally not here.

This was for MCAT prep. (Notice the correct answer is already given).

 

[cs24]

I literally only know that it is a Terms of Service violation from seeing the mods messages when they close threads. They'll certainly call you out for ToS violations, and yet even when actively looking for it, the damn thing is impossible to find.

I really was only posting that to give you a heads up, because frankly, you really have no other way of knowing since the ToS is apparently a ninja page.

...scrolls down to bottom of page, see "Terms and Rules" link... well... looks like I'm a ninja

 

[The Real SVB]

Well, we haven't as of yet. I'm not sure if the prof is just doing his own thing or what but we pretty much just covered the amino acid group pKas (didn't do any Henderson-hassalbalch) and now we're in metabolic pathways.

It's not even biochem. It's applied gen chem and shouldn't need to be explicitly taught

 

[mehc012]

...scrolls down to bottom of page, see "Terms and Rules" link... well... looks like I'm a ninja

I don't have anything that says that.
Also, I'd still expect a link on the main forum page, or in the Help section, or at the top near the stickies, or something!

 

[mehc012]

This was for MCAT prep. (Notice the correct answer is already given).

I know the answer was given. I was just giving you a heads up that stuff like this (particularly since it got into a discussion of 'what has been covered in class yet' which makes it sound class-related) usually either gets locked or moved to the MCAT Q&A section. I've seen threads which are blatantly MCAT-prep related get locked because they were in the main MCAT forum rather than the Q&A subforum. As I said, just a heads up so it ends up in the right place next time

 

[tantacles]

Locking. Pre-allo is not for homework help. Please keep discussion related to medical school admissions.