1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Semmy [17]
3 years ago
13

The pka of the α-carboxyl group of glutamine is 2.17, and the pka of its α-amino group is 9.13. calculate the average net charge

on glutamine if it is in a solution that has a ph of 8.20. if the charge is positive, do not enter a \" \" sign.
Chemistry
2 answers:
IgorLugansk [536]3 years ago
4 0
I think u add the numbers and get the total and divide by the set of numbers to get the average.
Serjik [45]3 years ago
3 0

Answer:

-0.1051

Explanation:

First, we need to find the degree of dissociation (α) of each of the groups using the Handerson-Halsebach equation:

pH = pKa + log (α/1-α)

log (α/1-α) =  pH - pKa

log (1-α/α) = pKa - pH

1-α/α =10^{pKa - pH}

1-α = 10^{pKa - pH}*α

α = \frac{1}{10^{pKa-pH} +1}

So, fo the α-carboxyl group:

α = \frac{1}{10^{-6.03} +1}

α = 1.0000

And for the α-amino group

α = \frac{1}{10^{0.93} +1}

α = 0.1051

In the ionization, the α-carboxyl group goes from neutral to a negative ion with charge -1, and the α-amino group goes from a positive ion with charge +1 to a neutral compound. So, the net charge is how many ions are presented multiplied by the charge.

For the first one, the value of α is the value of ions, but for the second, α represents the neutral, so the ions are 1-α:

-1*(1.000) + (+1)*(1-0.1051) = -0.1051

You might be interested in
If a certain compound has a formula XCl₃ what is the valency of X?
asambeis [7]

The general form of a compound can be written in the form of:

[X(a) Y(b)] ^ c

Where a and b are subscripts, and c is the superscript of the whole formula.

The relationship that we can derived here between the constants is:

(valence of X) * a + (valence of Y) * b = c

Since the formula obviously has no superscript, therefore c = 0. We also know in chemistry class that the valence of Cl is -1, therefore:

valence of X * 1 + (-1) * 3 = 0

valence of X - 3 = 0

<span>valence of X = 3</span>

6 0
3 years ago
How many polar bonds are found in this molecule
Law Incorporation [45]
A bond is non polar if it is between same atoms and polar if it is between different atoms.

Same atoms are like two dogs of same strength pulling a bone towards towards each other. But when it’s different atoms it’s like a big dog and small dog then the bone is more towards bigger dog. So it’s the same way in bonds.

Bonds are made up of electrons, when the more stronger pulling atom is present than other the electrons are more towards it and as a result we have polar bond. There is development of a kind of a negative pole and a positive pole.

The stronger atom has electrons towards itself so it has a little more negative charge while the other atom has positive charge. This makes bond polar.

So just look for bond between two different atoms, it would be polar.

Look at the pic below to see the answer.

Marked with green is bond between same atoms... one carbon and another carbon so it is not polar and test marked with blue are polar.

Well the answer should have been 10 but since the bonds at 3 and 8 are two of same type we count only one of them.


The answer is 8... well the answer should be 10 otherwise... discuss it with ur teacher

6 0
2 years ago
In order to murder somebody in the bathtub, police say that the suspect would need at least 50,000 grams of water. Was there eno
Gre4nikov [31]

Answer:

um, not sure how to answer this haha

Explanation:

8 0
3 years ago
8x10^-200 in significant figures PLEASE IVE BEEN STUCK ON IT FOR 2 HOURS
weqwewe [10]
I got 0 ?? if that’s any help
3 0
2 years ago
Of the reactions involved in the photodecomposition of ozone (shown below), which are photochemical? 1. o2 (g) + hν → o (g) + o
Taya2010 [7]

Answer:

The answers are...

Explanation:

2 and 4.

8 0
3 years ago
Other questions:
  • To change state from gas to a liquid
    7·1 answer
  • Calculate the molar mass of a gaseous substance if 0.125 g of the gas occupies 93.3 mL at STP.
    13·1 answer
  • These organs make urine by removing waste and water from the blood. What organs are shown in the picturehese organs make urine b
    13·1 answer
  • which of the following usually have lower melting points than ionic solids a) Atomic solids b) Molecular solids c) Network solid
    8·2 answers
  • Potassium and bromine draw the charges swapping charges formula and name
    15·1 answer
  • What is a function of the backbone in animals?
    10·1 answer
  • Help me pleaseeeeeeeeeee
    8·1 answer
  • How does area usually affect biodiversity within an ecosystem?
    8·2 answers
  • Can someone pleaseeeeeeeeeee check my work to see if I did it right?
    9·1 answer
  • Are any of these equations redox reactions? if so what are their reducing and oxidizing agents?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!