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
AURORKA [14]
2 years ago
12

Determine el PH y el % de disociación de una solución de ácido débil, sabiendo que se disuelven 20 gramos del ácido (masa molar=

55 grs) en un volumen total de 2100 ml. Ka=1,65 x 10 -8
Chemistry
1 answer:
IceJOKER [234]2 years ago
5 0

Answer:

pH = 4.27. Porcentaje de disociación: 0.03%

Explanation:

El pH de un ácido débil, HX, se obtiene haciendo uso de su equilibrio:

HX(aq) ⇄ H⁺(aq) + X⁻(aq)

Donde la constante de equilibrio, Ka, es

Ka = 1.65x10⁻⁸ = [H⁺] [X⁻] / [HX]

Como los iones H⁺ y X⁻ vienen del mismo equilibrio podemos decir:

[H⁺] = [X⁻]

[HX] es:

20g * (1mol/55g) = 0.3636moles / 2.100L = 0.1732M

Reemplazando es Ka:

1.65x10⁻⁸ = [H⁺] [H⁺] / [0.1732M]

2.858x10⁻⁹ = [H⁺]²

5.35x10⁻⁵M = [H⁺]

pH = -log[H⁺]

<h3>pH = 4.27</h3>

El porcentaje de disociacion es [X⁻] / [HX] inicial * 100

Reemplazando

5.35x10⁻⁵M / 0.1732M * 100

<h3>0.03%</h3>
You might be interested in
3. Using the solubility of ionic compounds table and/or the solubility rules,
Klio2033 [76]
Answer:

Sugar, sodium chloride, and hydrophilic proteins
6 0
3 years ago
How are sponges and he coral in coral reefs similar
r-ruslan [8.4K]

Answer:

They are both alive organisms. They can breathe and they are known as living creatures. The stay in the same place and food comes to them and they dont hunt for food. They are both like traps.

Explanation:

8 0
3 years ago
Please answer each:) &lt;3
Nutka1998 [239]
⭐Hola User____________

⭐Here is Your Answer...!!!

⭐____________________

SOLUTIONS

↪1) Aqueous Solution

↪2) Solvent

↪3) Solute
_______________________

⚓〽⚓
4 0
3 years ago
A gas sample is held at constant temperature. What happens to the pressure of the sample if the volume is doubled and the number
Iteru [2.4K]

Answer:

If the volume is doubled and the number of molecules is doubled, pressure is unchanged

Explanation:

Step 1: Data given

Temperature = constant

Volume will be doubled

Number of molecules will be doubles

Step 2:

p*V = n*R*T

⇒ gas constant and temperature are constant

Initial pressure = n*R*T / V

Initial pressure = 2*R*T/2

Initial pressure =  RT

Final pressure = 4*RT / 4

Final pressure = R*T

If the volume is doubled and the number of molecules is doubled, pressure is unchanged

3 0
3 years ago
Describe the method of steel manufacture used when removes the impurities carbon, phosphorus and sulfur​
melisa1 [442]

Explanation:

Steelmaking is the process of producing steel from iron ore and/or scrap. In steelmaking, impurities such as nitrogen, silicon, phosphorus, sulfur and excess carbon (most important impurity) are removed from the sourced iron, and alloying elements such as manganese, nickel, chromium, carbon and vanadium are added to produce different grades of steel.

PLEASE THANK, RATE AND FOLLOW ME

HOPE IT HELPS YOU

6 0
3 years ago
Other questions:
  • Calculate the number of molecules <br> 2.62x10^-6g of water, H2O
    9·1 answer
  • Which method is appropriate for separating a mixture of iron and aluminum?
    12·1 answer
  • During boiling, bubbles appear in the liquid water. In the boxes below represent the
    9·1 answer
  • Select the correct answer.
    15·1 answer
  • Which of the following situations best shows deposition?
    9·1 answer
  • Which of the following is not a compound? HCl Cl2 NaCI CO2
    13·1 answer
  • 18) Mg and S would be expected to react in a ratio of: <br> (1:1, 2:1, 1:2 or 2:3)
    5·1 answer
  • 4. What is the SI unit for mass
    15·2 answers
  • Covalently bonded compounds differ from ionically bonded compounds because:
    10·1 answer
  • What will most likely happen when a component is removed from a reaction system at equilibrium?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!