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
Levart [38]
2 years ago
6

calculate the ph of a 0.020 m carbonic acid solution, h2co3(aq), that has the stepwise dissociation constants ka1

Chemistry
1 answer:
fgiga [73]2 years ago
5 0

The calculated pH is 3.79. therefore, the solution is acidic.

No, carbonic acid is not a strong acid. H2CO3 is a weak acid that dissociates into a proton (H+ cation) and a bicarbonate ion (HCO3- anion). This compound only partly dissociates in aqueous solutions.

H2 CO3    =    H (+) + HCO3(-)          Ka1 = 4.3 * 10^ -7

   0.06 - x              x          x

Ka1 = x^2 / (0.06 - x) = 4.3 * 10^ - 7

A low Ka => x << 0.06 => 0.06 -x ≈ 0.06

=> Ka1 ≈ x^2 / 0.06 => x^2 ≈ 0.06 * Ka1 = 0.06 * 4.3 * 10^-7

=> x ≈ √ [ 2.58 * 10 ^ -8] = 1.606 * 10^ - 4 = 0.0001606

Second dissociation

HCO3(-)    =   H (+) + CO3(2-)         Ka2 = 5.6 * 10^ - 11

0.0001606 - y            y             y

Ka2 ≈ y^2 / 0.0001606 => y = √ [0.0001606 * 5.6* 10^ -11]

y = 9.48 * 10^ -8

An acidic solution has a high concentration of hydrogen ions (H +start superscript, plus, end superscript), greater than that of pure water.

[H+] = x + y = 1.607 * 10^ -4

pH = - log [H+] = 3.79

Learn more about concentration here-

brainly.com/question/10725862

#SPJ4

You might be interested in
How many grams will be produced??
Akimi4 [234]

Explanation:

b is correct. 30.6 g H2O is produced.

3 0
3 years ago
He (Helium) is _________ atomic molecule.
babunello [35]

Answer:

Monatomic molecule

Explanation:

Each helium atom has 2 electrons, which is already the maximum no. of electrons that can fit in the first electron shell. When the outermost electron shell is full (2 for the first layer, 8 for others), the atom is stable.

Helium atom itself is already stable, so it doesn't need to combine with another helium atom to form a molecule, hence we call it monatomic.

8 0
3 years ago
Read 2 more answers
Whats the difference between covalent and ionic bonds
il63 [147K]

Answer: The two main types of chemical bonds are ionic and covalent bonds. An ionic bond essentially donates an electron to the other atom participating in the bond, while electrons in a covalent bond are shared equally between the atoms. The only pure covalent bonds occur between identical atoms.Jan 23, 2020

Explanation: Hope this helped!!!!

4 0
3 years ago
(Question one)<br> Pls help it’s 12:14 in the morning I just wanna go to bed :(
Goshia [24]

Answer:

climate

weather ?

Explanation:

7 0
3 years ago
Read 2 more answers
If an unknown element didplays many extremly strong metallic properties, where is it most likely to be located on the periodic t
Ipatiy [6.2K]

This is late but for anyone else who needs it...It's D. Far left

4 0
3 years ago
Other questions:
  • 8. (16 pts.) Using sentences, compare a dipeptide to a fatty acids specifically in terms of water
    10·1 answer
  • Metals experience plastic deformation when _____. A. Their crystal patterns have been disrupted by stress
    9·1 answer
  • What is the formula (with cation and anion charges) for copper (II) hydroxide? ​
    5·1 answer
  • If a reaction has a theoretical yield of 10.0 g and a student does the reaction and
    9·2 answers
  • pH is a logarithmic scale used to indicate the hydrogen ion concentration, [H+], of a solution: pH=−log[H+] Due to the autoioniz
    11·1 answer
  • What is the conjugate acid in the following equation hbr + H2O yields h30 positive + BR negative
    11·1 answer
  • What actions can you take to reduce your impact on society?
    15·1 answer
  • The atomic model that describes an atom as a spherical object containing a certain number of electrons trapped in a mass of posi
    12·2 answers
  • How are you! :D I hope your doing good
    5·1 answer
  • Calculate the concentration of clo2− at equilibrium if the initial concentration of hclo2 is 2. 25×10^−2 m.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!