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
Ronch [10]
3 years ago
8

Calculate the volume of the acid solution and the volume of the conjugate base solution that would be needed to prepare a buffer

with a total volume of 200. mL. Assume all stock solutions of the conjugate pair are 1.00 M. Show all of your work.
Chemistry
1 answer:
bogdanovich [222]3 years ago
6 0

Answer:

Explanation:

This can be contradictory, depending on whether the 0.1 M

is the total species concentration or the concentration of each of the two components. I'll consider this to be the former...

VA− = 9.125 mL

VHA = 15.875 mL

The Henderson-Hasselbalch equation is:

pH = pKa + log [A−][HA]

We have a pH 4.5

solution of acetic acid and acetate, so from there we can get the ratio of weak acid to conjugate base:

[A−][HA]=10

pH − pKa = 104.5 − 4.74 = 0.5754

Now, if the total concentration is

0.10 M , then:

[HA] + [A−] 0.5754

[HA] = 0.10 M

⇒[HA] = 0.10 M 1.0000 +0.5754

= 0.0635 M

−−−−−−−−

⇒[A−] = 0.0365 M

−−−−−−−−

and these concentrations are AFTER mixing. Since the total volume is 50 mL , or 0.050 L, the mols of each component (which are constant!) are:

nA − = 0.0365 molL × 0.050L =

0.001825 mols

−−−−−−−−−−−−

nHA = 0.0635 molL × 0.050L =

0.003175 mols

−−−−−−−−−−−−

So, if both of the starting concentrations were

0.20 M, we can find the volume they each start with:

VA − = 1 L0.20mols

A− × 0.001825mols A− = 0.009125 L = 9.125 mL

−−−−−−−−

VHA = 1 L 0.20 mols HA × 0.003175

mols HA = 0.015875 L = 15.875 mL

−−−−−−−−−

And this should make sense, because the total starting volume is

25.000 mL , the total ending volume is twice as large; the total species concentration is half the concentration that both species started with.

You might be interested in
On the fahrenheit scale, at what temperature does water boil? a. 451°f b. 264°f c. 212°f d. 100°f
taurus [48]

The temperature that water boils on the fahrenheit scale is c. 212°f.

<h3>What is Temperature conversation?</h3>

Temperature conversation is a way of converting a temperature from a unit to another using conversation scale.

Therefore, on fahrenheit scale water boils at  212°f which is equivalent to 100°C on the Celcius scale.

Learn more about Temperature conversation at;brainly.com/question/23419049

#SPJ4

5 0
2 years ago
(6.7*10^3)g/mol*L to kg/mol*dL
vodka [1.7K]
6.7× 10³ g/mol*L ×(1Kg÷1000g) × (1L÷10dL)=  0.67
7 0
3 years ago
Read 2 more answers
What is the correct name for SiCl5?
lyudmila [28]

Answer:

SbCl5

Antimony pentachloride

Antimony pentachloride is a chemical compound with the formula SbCl5.

- wikipedia

7 0
3 years ago
Used all my points please help with Lesson 13: Matter and Energy Unit Test
fredd [130]

Answer:

oceans rise and temputer in creses.

Explanation:

3 0
3 years ago
1. Why fractional distillation has<br> fractionating column but not in simple<br> distillation?
egoroff_w [7]

Answer:

  • <em>Fractional distillation leads to a better separation than simple distillation because the glass beads in the fractionating column provide "theoretical plates" on which the vapors can condense and then re-evaporate, and re-condense, essentially distilling the compound many times over.</em>

Explanation:

<h2> please mark me as brainlist </h2>
5 0
3 years ago
Other questions:
  • C3H8 and CH4 are 2 compounds made from the same elements. This is an example of which law? A) Law of Conservation of Mass b) Law
    14·1 answer
  • Who discovered electron ???
    9·1 answer
  • Why is aluminum a substance
    11·2 answers
  • What type of matter is made of only one kind of atom
    9·2 answers
  • Which statement best describes the organelles in a cell
    14·1 answer
  • Based on the results of this lab, write a short paragraph that summarizes how to distinguish physical changes from chemical chan
    15·3 answers
  • Choose the correct word that describes the description. If you add too much sugar to the water, some of the crystals will sit on
    10·1 answer
  • Which best describes the difference between stocks and bonds
    11·1 answer
  • HELP!!! ITS TIMED!!
    11·1 answer
  • Please fast but right no link or bot
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!