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
marysya [2.9K]
3 years ago
5

A phosphate buffer is involved in the formation of urine. The developing urine contains H2PO4 and HPO42- in the same concentrati

on as present in blood plasma. Identify the acid and its conjugate base. Write the ionization equation and the Ka expression. 6.2 X 10^(8) a. The Ka of H2PO4 is 6.2 x 108. What is the pka? Is this acid weaker or stronger than H2CO3? Which buffer system is more optimal for regulating pH in the body? b. Using LeChatlier's Principle, what happens if the urine is acidified (H+ ions added)?
Chemistry
1 answer:
Katen [24]3 years ago
3 0

Answer:

The ionization equation is

H_{2}PO_{4}^{-}  +H_{2}O ⇄HPO_{4}^{-2}  +H_{3}O^{+} (1)

Explanation:

The ionization equation is

H_{2}PO_{4}^{-}  +H_{2}O ⇄HPO_{4}^{-2}  +H_{3}O^{+} (1)

As the Bronsted definition sais, an acid is a substance with the ability to give protons thus, H2PO4 is the acid and HPO42- is the conjugate base.

The Ka expression is the ratio between the concentration of products and reactants of the equilibrium reaction so,

Ka = \frac{[HPO_{4}^{-2}] [H_{3}O^{+}]}{[H_{2}PO_{4}^{-}] [H_{2}O]} = 6.2x10^{-8}

The pKa is

-Log (Ka) = -Log (6.2x10^{-8}) = 7.2

The pKa of H2CO3 is 6,35, thus this a stronger acid than H2PO4. The higher the pKa of an acid greater the capacity to donate protons.

In the body H2CO3 is a more optimal buffer for regulating pH due to the combination of the two acid-base equilibriums and the two pKa.

If the urine is acidified, according to Le Chatlier's Principle the equilibrium (1)  moves to the left neutralizing the excess proton concentration.

You might be interested in
What is an evenly distributed, uniform mixture called?
Ivenika [448]

Answer:

The correct answer is Option

B. A homogeneous mixture

Explanation: Mixture is solution which is made of two or more than two substances which are combined only physically not chemically. There are two types of mixture i. e. Homogeneous mixture and heterogeneous mixture. Homogeneous mixture is a mixture in which the substances which are combined are uniform in appearance and heterogeneous mixture is a mixture in which substances are suspended in the solution and easily differentiated.

6 0
3 years ago
If the solubility of a gas in water is 5.0g/L when the pressure of the gas above the water is 2.0 atm, what is the pressure of t
Serggg [28]
F the solubility of a gas in water is 5.0g/L when the pressure of the gas above the water is 2.0 atm, what is the pressure of the gas above the water <span>when the solubility of the gas is 1.0 g/L</span>

Here's how to solve this one.
The formula for solubility is 
<span>P1 / P2 = solubility1 / solubility2 </span>
P1=2*1/5= .4 atm

So the correct answer is 0.4 atm.
5 0
3 years ago
72.40% iron,27.60% Oxygen Empirical formula
VARVARA [1.3K]

Explanation:

Fe. O

72.40/ 56 27.60/16

____________________

1.29/1.29 1.725/1.29

_____________________

1. :. 1

<h3>Emperical formula = FeO</h3>
6 0
3 years ago
What is a similarity between wind and water?
labwork [276]
They are both sources of power for objects that people use.
5 0
2 years ago
Which word is used to describe a flow of electrons through a conductor?
Lunna [17]
Electric current is flow of electrons in a conductor. The force required to make current flow through a conductor is called voltage and potential is the other term of voltage.
5 0
2 years ago
Read 2 more answers
Other questions:
  • A plastic ball floats on the water. What do you know about its density?
    11·1 answer
  • A 4.98g sample of aniline (C6H5NH2, molar mass is 93.13g/mol) was combusted in a bomb calorimeter with a heat capacity of 4.25kJ
    12·1 answer
  • Cherylanne mixes together Chemical A and Chemical B in a test tube, forming Chemical C. The mixture instantly turns cool to the
    11·2 answers
  • Consider the reaction 2 CO + O2 → 2 CO2 .What is the percent yield of carbon dioxide
    10·1 answer
  • How do I balance this equation? (Number 2)
    5·1 answer
  • Which organelles surround the cell? Select two options.
    7·1 answer
  • What is the mass of a 120 mL sample of pure silicon with a density of 2.3 g/mL?
    9·1 answer
  • A kitchen worker at a local hospital was filling salt shakers. For those patients on a sodium restricted diet due to high blood
    13·1 answer
  • 1) Which of the following is a property of matter that can be observed without changing thecomposition of the matter?
    12·2 answers
  • most radioactive atoms “spontaneously” decay to a more stable form. where does the “additional” energy go once the atoms have de
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!