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
Jobisdone [24]
3 years ago
13

Consider a 125 mL buffer solution at 25°C that contains 0.500 mol of hypochlorous acid (HOCl) and 0.500 mol of sodium hypochlori

te (NaOCl). What will be the pH of this buffer solution after adding 0.341 mol of HCl? The Ka of hypochlorous acid is 2.9 x 10-8 . Assume the change in volume of the buffer solution is negligible
Chemistry
1 answer:
Helga [31]3 years ago
6 0

Answer:

pH = 6.82

Explanation:

To solve this problem we can use the<em> Henderson-Hasselbach equation</em>:

  • pH = pKa + log\frac{[NaOCl]}{[HOCl]}

We're given all the required data to <u>calculate the original pH of the buffer before 0.341 mol of HCl are added</u>:

  • pKa = -log(Ka) = -log(2.9x10⁻⁸) = 7.54
  • [HOCl] = [NaOCl] = 0.500 mol / 0.125 L = 4 M
  • pH = 7.54 + log \frac{4}{4}
  • pH = 7.54

By adding HCl, w<em>e simultaneously </em><u><em>increase the number of HOCl</em></u><em> and </em><u><em>decrease NaOCl</em></u>:

  • pH = 7.54 + log\frac{[NaOCl-HCl]}{[HOCl+HCl]}
  • pH = 7.54 + log \frac{(0.500mol-0.341mol)/0.125L}{(0.500mol+0.341mol)/0.125L}
  • pH = 6.82
You might be interested in
Potassium -39 has how many neutrons
enyata [817]
Potassium has 20 neutrons

Hope this helps
5 0
3 years ago
Which of the following is a correct observation when water is added to quick lime?
masya89 [10]

Answer:

c

Explanation:

thw observation of water that is added

7 0
3 years ago
Read 2 more answers
Multiple-choice questions have a special grading rule determined by your instructor. Assume that your instructor has decided to
leva [86]

Answer:

The correct answer is option d.

Explanation:

On submission of an incorrect answer to a multiple-choice question with n options,  we will lose:

=\frac{ 1}{(n-1)} of credit

If we multiple-choice question has five answer choices. And we have submitted 1 wrong answer. the fraction of credit we loose :

=\frac{ 1}{(5-1)} of credit

=\frac{1}{4} of credit

=0.25 credit

The percentage of credit we loose:

=0.25\times 100 of credits

=25\% of credits

6 0
3 years ago
TRUE OR FALSE, Nibiru is a Brown Dwarf that is 20 times the size of the Jupiter.
Ganezh [65]

Answer:false I think

Explanation:

5 0
2 years ago
Why is gold considered matter?
Marina CMI [18]

Answer:

A

Explanation:

Anything which takes up space and has mass is considered matter.

Please mark Brainliest if this was helpful!

3 0
2 years ago
Other questions:
  • Which correctly describes the reaction between potassium and excess water?
    14·1 answer
  • ANSWER THIS PLS IM LEGIT DYING HERE
    12·2 answers
  • What are the possible phenotypes of the offspring?
    15·2 answers
  • isotopes of an element will always have the same a. number of protons. b. number of neutrons. c. number of electrons. d. mass.
    11·1 answer
  • What is a planned goal of the Exploration Mission 2?
    6·1 answer
  • Which of these is an acid A(Vinegar
    15·1 answer
  • As the number of electrons added to the same principal energy level increases, atomic size generally
    14·2 answers
  • Sulfur (S) = 32, and of oxygen (O) = 16.
    14·1 answer
  • Detection of nitrogen and sulphur​
    7·1 answer
  • 2. A plant growing in response to the sunlight.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!