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
Harlamova29_29 [7]
4 years ago
9

Which acid is the best choice to create a buffer with ph= 3.19?

Chemistry
1 answer:
Crazy boy [7]4 years ago
5 0
<span>The best choice is hypochlorous acid nitrous acid (HNO2) because it has the nearest value of pK to the desired pH.
pKa of </span>nitrous acid<span> is 3.34 
If we know pKa and pH values,  we can calculate the required ratio of conjugate base (NO2⁻) to acid (HNO2) from the following equation:
pH=pKa + log(conc. of base)/( conc. of acid)
</span><span>3.19=3.34 + log c(NO2⁻)/c(HNO2)
</span><span>3.19 - 3.34 = log c(NO2⁻)/c(HNO2)
-0.15 = log c(NO2⁻)/c(HNO2)
c(NO2⁻)/c(HNO2) = 10⁰¹⁵ = 1.41

</span>
You might be interested in
Let's say you eat some food, jump down some stairs, run outside, and then go inside and turn on the lights. Name and describe al
pychu [463]

Answer:Chemical energies,elastic energy,kinetic energy,Light energy :)

Explanation:

6 0
3 years ago
Which description is not a property of an acid?
AnnZ [28]
The second one
only bases turn litmus paper blue
6 0
4 years ago
Read 2 more answers
a collection of nerve fibers through which impulses travel between the central nervous system and other parts of the body
rewona [7]
A collection of nerve fibers through which impulses travel between the central nervous system and other parts of the body are the nerves.
4 0
3 years ago
Elements:
brilliants [131]
Elements:
• atom
• cannot
• Periodic Table

Compounds:
• atoms
• chemically
• cannot


Mixtures:
• elements or compounds
• homogeneous
• heterogeneous
8 0
3 years ago
Boyle's Law is about how the volume of a gas is affected by... Boyle's Law is about how the volume of a gas is affected by... te
Lelu [443]

Answer:

please is this a question or answer I don't understand

8 0
2 years ago
Other questions:
  • Which statement best describes the nature of science
    5·2 answers
  • Which of the following can be true about a chemical reaction
    12·1 answer
  • What is the Number of Cations &amp; anions in a Aluminum&amp; chloride
    5·1 answer
  • How can a permanent magnet be damaged?
    10·1 answer
  • The elements in groups 3-12 are known as:
    15·1 answer
  • Which sequence represents the relationship between pressure and volume of an ideal gas as explained by the kinetic-molecular the
    10·2 answers
  • A chemical reaction is expected to produce 0.068 moles of oxygen. What volume in liters will be occupied by this gas sample at 2
    11·1 answer
  • Which of the following chemical formulas represents a common acid?
    15·1 answer
  • What’s crystallisation?
    8·1 answer
  • Which of these has an oxidation number of zero (0)? Cal2, Ca CaS, Ca3N2​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!