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
PLEASE HELP
hram777 [196]

Answer:

The solubility of a solute becomes weaker and changes it’s solid state when heated because it causes the molecules to dissolve faster. If the solution was cooled, it would begin to regain its solid form as it’s molecules would be slowing down. I hope this helps!

8 0
3 years ago
3. Calculate the amount of sodium carbonate required to neutralize 50 cc of N-H2SO4.​
zlopas [31]

Answer:

234567890

Explanation:

6 0
3 years ago
SHOW WORK
stealth61 [152]
PV = nRT —> n = PV/RT

P = 2.90 atm
V = 4.80 L
R = 0.08206 L atm / mol K
T = 62.0 + 273 = 335 K (make sure you convert from celsius to kelvin)

n = (2.90 • 4.80) / (0.08206 • 335) = 0.506 moles of gas
4 0
2 years ago
2. A gas occupies 320. ml at a pressure of 420.5 mmHg. Determine the volume if the pressure is decreased to 300. mmHg.
arsen [322]

Explanation:

v1 p1 = v2 p2

v2 = v1p1/p2

v2= 320×420.5/300

v2=449ml

5 0
2 years ago
50.0 mL of an HNO^3 solution were titrated with 36.90 mL of a 0.100 M LiOH solution to reach the equivalence point. What is the
NISA [10]

Answer:

0.0738 M

Explanation:

HNO3 +LiOH = LiNO3 + H2O

Number of moles HNO3 = number of moles LiOH

M(HNO3)*V(HNO3) = M(LiOH)*M(LiOH)

M(HNO3)*50.0mL = 0.100M*36.90 mL

M(HNO3) = 0.100*36.90/50.0 M = 0.0738 M

6 0
3 years ago
Other questions:
  • Which statement describes a change that occurs during a chemical reaction? A. Atoms in the original substances are arranged in a
    14·2 answers
  • Why does more evaporation happen from the oceans than from freshwater sources?
    6·2 answers
  • Hemoglobin, the oxygen-carrying protein in red blood cells, has four iron atoms per molecules ad contains 0.340 percent iron by
    14·1 answer
  • Gravity does NOT * 10 points increase when the distance between two objects increases. increase when the distance between two ob
    9·1 answer
  • Balance the following equation by adding the correct mole numbers.<br>P⁴+Cl²-&gt;PCl³​
    15·1 answer
  • Consider the reversible reaction in aqueous medium shown below. At equilibrium, the concentrations of A, B, C, and D are 0.0053
    7·1 answer
  • How much power is required to pull a slad if you use 60j of work in 5 second ​
    13·1 answer
  • Why do scientist look to the ocean floor to research the mantle?
    10·1 answer
  • An electron moves from an excited state back to the ground state releasing
    14·1 answer
  • Why must ionic compound have a total charge of 0?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!