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
Setler [38]
3 years ago
15

A 0.2 m solution of a weak acid ha dissociates such that 99.4% of the weak acid remains intact (i.e., remains as ha). what is th

e pka of the weak acid?
Chemistry
1 answer:
Kobotan [32]3 years ago
3 0
HA -----> H(+) + A(-)
0,2-x.........x..........x

100% - 99,4% = 0,6% = 0,006

x = 0,6%×0,2 = 0,006 × 0,2 = 0,0012

HA --------------> H(+) + A(-)
0,2-x.....................x..........x
0,2-0,0012.....0,0012..0,0012
0,1988.............0,0012..0,0012

K = [H+][A-]/[HA]
K = (0,0012)^2/0,1988
K = 0,0000072434

pKa = -logK= -log0,0000072434 = 5,14

:)
You might be interested in
Someone please help will mark as brainliest
Bas_tet [7]

Answer:

4. A subscript is a sentence below a line. You cannot change subscripts in a chemical formula to balance a chemical equation

5. where's/whats the equation??

6. ^^^

Explanation:

7 0
3 years ago
1.- ¿Cuál es la densidad del corcho, si un cubo que mide 1.50 cm de lado tiene la masa de 1.00 g?
Brrunno [24]

Answer: 2.50

Explanation:

8 0
3 years ago
4. A crystalline solid is brittle, has a high melting point, and has low electrical conductivity. Which of the following describ
aleksley [76]
 A crystalline solid is brittle, has a high melting point, and has low electrical conductivity is  ionic bonds between metals and nonmetals.
 On the basis of structure, ca F2 is the most brittle
hope this helps
5 0
3 years ago
Read 2 more answers
Locate the ion that has no change in oxidation number in redox reactions.
natali 33 [55]

a. Spectator ions are the ones that are present but does not enter into the actual chemical  reaction.

b. Na⁺ and NO₃⁻ ions are spectator ions involved in this above mentioned reaction

<u>Explanation:</u>

  • In redox reactions, for example reaction of aqueous silver nitrate and aqueous sodium chloride, silver chloride settles down as a precipitate by the addition of Ag⁺ ion from AgNO₃ and Cl⁻ ions from NaCl .
  • The other 2 ions that is NO₃⁻ ion and Na⁺ ion in the reaction do not enter into the reaction and they are called as Spectator ions.

This can be expressed as the following equation,

AgNO₃(aq) + NaCl(aq) →AgCl(s) + NaNO₃

5 0
4 years ago
Escriba un poema usando 4 de las siguientes palabras: lluvia, nieve, lluvia, granizo, tornado, huracanes, frente cálido, frente
Artemon [7]

Answer:

i dont speak mexican

Explanation:

3 0
2 years ago
Other questions:
  • What is temperature?
    14·2 answers
  • Is using gasoline to drive a chemical or physical
    7·1 answer
  • How many atoms of N are in 137.0 grams of N2O3?
    5·2 answers
  • Which atom in each pair that has the greater electronegativity.
    15·1 answer
  • Arrange the elements in order of increasing ionization energy. Use the
    13·2 answers
  • How many liters are in 5.42 mols of O2 gas?
    5·1 answer
  • 2. How much energy must be removed from a 50.0 g sample of steam in order to get it to condense
    7·1 answer
  • Scientists have cited gas emission as contributing to global [blank] , which is a general increase in temperatures worldwide.
    7·1 answer
  • When vinegar and baking soda are mixed together, they experience a chemical change.
    8·2 answers
  • How does the phase diagram of a substance illustrate the relationship between temperature and kinetic energy of molecules
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!