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
serious [3.7K]
3 years ago
9

You wish to prepare a buffer consisting of acetic acid and sodium acetate with a total acetic acetate plus acetate concentration

of 250 mm and a ph of 5. what concentrations of acetic acid and sodium acetate should you use
Chemistry
1 answer:
vovangra [49]3 years ago
7 0

<u>Ans: Acetic acid = 90.3 mM and Sodium acetate = 160 mM</u>

Given:

Acetic Acid/Sodium Acetate buffer of pH = 5.0

Let HA = acetic acid

A- = sodium acetate

Total concentration [HA] + [A-] = 250 mM ------(1)

pKa(acetic acid) = 4.75

Based on Henderson-Hasselbalch equation

pH = pKa + log[A-]/[HA]

[A-]/[HA] = 10^(pH-pKa) = 10^(5-4.75) = 10^0.25 = 1.77

[A-] = 1.77[HA] -----(2)

From (1) and (2)

[HA] + 1.77[HA] = 250 mM

[HA] = 250/2.77 = 90.25 mM

[A-] = 1.77(90.25) = 159.74 mM



You might be interested in
scientist have found many marine fossils on the mountain far from any ocean or sea what is the best explanation for these fossil
DaniilM [7]

The best explanation, though it's controversial, is that a great flood had once covered the earth for a brief period of time.

8 0
3 years ago
Question 8
castortr0y [4]

Answer:

The 5 chemical changes are. 1) Tarnish, 2) Rust, 3) Dissolve, 4) Burn, 5) Bake.

5 0
3 years ago
State 3 functions of enzymes in the body
9966 [12]
<span>Enzymes have three main characteristics. First, they increase the rate of a natural chemical reaction. Secondly, they typically only react with one specific substrate or reactant, and thirdly, enzyme activity is regulated and controlled within the cell through several different means, including regulation by inhibitors and activators. It is possible to group enzymes into different categories, including oxidases, transferases, hydrolases, lyaes, isomerases and ligases. In naming enzymes, the "-ase" suffix is often appended to the name of the substrate molecule upon which which the enzyme reacts. For example, the enzyme sucrase catalyzes the transformation of the sugar sucrose in to glucose and fructose. In this case, the "sucr-" suffix represents the molecule upon which the sucrase enzyme reacts. Not all enzymes are named according to this convention.</span>
6 0
3 years ago
Does someone know the combustion in a jacket potato???
Leya [2.2K]

Answer:

Some varieties of potato, such as Russet and King Edward, are more suitable for baking than others, owing to their size and consistency. Despite the popular misconception that potatoes are fattening, baked potatoes can be part of a healthy diet.[2]

7 0
3 years ago
Fusion reactors are more desirable than fission because:
Serga [27]
I believe it is A)fuel is more readily available:)
4 0
3 years ago
Read 2 more answers
Other questions:
  • Explain why a single atom of hydrogen cannot produce all four hydrogen spectral lines simultaneously.
    7·1 answer
  • What is ozone ? A) dissolved oxygen B) the main catalyst in photosynthesis C) a type of oxygen D) a form of calcium carbonate
    9·2 answers
  • Classify the following as fluids or solids: warm butter, liquid nitrogen, paper, neon gas, ice.
    15·1 answer
  • Absolute zero is
    13·1 answer
  • Solid iodine trichloride is prepared in two steps: first, a reaction between solid iodine and gaseous chlorine to form solid iod
    8·1 answer
  • In summary, a heritable characteristic that helps an animal or plant to have more offspring which survive to reproduce will tend
    8·1 answer
  • Given the chemical formula, KNO3, what is the percent nitrogen in the compound?
    10·1 answer
  • How many total electrons can be contained in the 4f sublevel?
    13·1 answer
  • what quantity of ethylen glycol must be added to 125 g of water to raise the boiling point of 1.0 degrees celsuis
    13·1 answer
  • Pls help me !
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!