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
Svetach [21]
3 years ago
5

If the ka of a monoprotic weak acid is 8.4 × 10-6, what is the ph of a 0.45 m solution of this acid

Chemistry
1 answer:
olga_2 [115]3 years ago
7 0

Consider the acid to be HA so the equation for acid will be:

HA+H₂O---->H₃O⁺ +A⁻

Initial: 0.45 0 0 0

Final 0.45-x x x x

Kₐ= [H₃O⁺][A⁻]/[HA]

= x²/0.45-x

8.4 × 10⁻⁶= x²/0.45-x

3.78× 10⁻⁶-8.4 × 10⁻⁶x=x²

On solving equation,

x= 0.0018

[H₃O⁺]=[A⁻]=x=0.0018

pH= -log[H₃O⁺]

= -log[0.0018]

= 2.74

You might be interested in
Helpppooo give answer thanks
DaniilM [7]

Answer:

625 mL

Explanation:

From the question given above, the following data were obtained:

Volume of stock solution (V₁) = 250 mL

Molarity of stock solution (M₁) = 5 M

Molarity of diluted solution (M₂) = 2 M

Volume of diluted solution (V₂) =?

The volume of the diluted solution can be obtained by using the dilution formula as illustrated below:

M₁V₁ = M₂V₂

5 × 250 = 2 × V₂

1250 = 2 × V₂

Divide both side by 2

V₂ = 1250 / 2

V₂ = 625 mL

Therefore, the volume of the diluted solution is 625 mL.

8 0
3 years ago
Is mayonnaise an element compound solution or colloids
Alenkinab [10]
The answer to your question is mayonnaise is colloids.
5 0
3 years ago
Read 2 more answers
Which of the following examples is a molecule with a covalent bond?
serious [3.7K]

Answer:

B. CO

Explanation:

4 0
3 years ago
Concrete is made of an uneven mixture of gravel, sand, and water. It is _____. homogenous heterogeneous a solution a solute
Kobotan [32]

heterogeneous, because it does not have a uniform texture

hope That helps

7 0
3 years ago
Is adding zinc to hydrogen chloride a chemical or physical change
BlackZzzverrR [31]
That is a chemical change.. Hope I helped! 
8 0
3 years ago
Read 2 more answers
Other questions:
  • An atom of 14 6 c carbon decays by gamma decay which atom is left after the decay
    15·2 answers
  • The lithospheric plates float on top of the _______, which is a weak part of the mantle that flows slowly.
    12·1 answer
  • What is formed from 2 pieces of different metals stuck together lengthwise?
    11·1 answer
  • A. Electrons have a charge of_____
    13·2 answers
  • What is the metal cation in K,SO,? (cation is pronounced cat-ion and refers to a positively charged ion)
    6·1 answer
  • Which property of CNG is used to fill it in cylinders?
    10·1 answer
  • to make a large quantity of a 5% solution of HCl but only have 25mL HCl. what volume of 5% solution can be made from this volume
    9·1 answer
  • What % of original U238 remains after three half lives?<br> 1-50<br> 2-25<br> 3-12.5<br> 4-6.25
    15·1 answer
  • A chemist must prepare 0.200 L of aqueous silver nitrate working solution. He'll do this by pouring out some aqueous silver nitr
    11·1 answer
  • What volume of a 3.95 M
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!