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
Tatiana [17]
2 years ago
7

A monoprotic weak acid when dissolved in water is 0.66% dissociated and produces a solution with a pH of 3.04. Calculate the Ka

of the acid. g
Chemistry
1 answer:
raketka [301]2 years ago
3 0

Answer:

Ka = 6.02x10⁻⁶

Explanation:

The equilibrium that takes place is:

  • HA ⇄ H⁺ + A⁻
  • Ka = [H⁺][A⁻]/[HA]

We <u>calculate [H⁺] from the pH</u>:

  • pH = -log[H⁺]
  • [H⁺] = 10^{-pH}
  • [H⁺] = 9.12x10⁻⁴ M

Keep in mind that [H⁺]=[A⁻].

As for [HA], we know the acid is 0.66% dissociated, in other words:

  • [HA] * 0.66/100 = [H⁺]

We <u>calculate [HA]</u>:

  • [HA] = 0.138 M

Finally we <u>calculate the Ka</u>:

  • Ka = \frac{[9.12x10^{-4}]*[9.12x10^{-4}]}{[0.138]} = 6.02x10⁻⁶
You might be interested in
1.15 g of a metallic element reacts with 300 cm3 of oxygen at 298 K and 1 atm pressure, to form. an oxide which contains O2– ion
Deffense [45]
D sodium
hope it helps
5 0
3 years ago
The most malleable metal is _________
Ostrovityanka [42]

Answer:

Gold

.........

..........

8 0
2 years ago
Read 2 more answers
Which of the following functional groups acts most like an acid in water? A) carboxyl B) amino C) carbonyl D) hydroxyl.
Anestetic [448]

Answer : A - carboxyl group.


The carbon in the carboxyl group is bonded to a hydroxyl group and also it is double bonded to an oxygen group.


The carboxyl group when it is dissolved in a solution donates it's hydrogen ion(H+ ion). When it is dissolved in water, the carboxyl group loses its H+ ion to form negatively charged ion.


RCOOH + H2O⇄RCOO- + H3O+


Thus the carboxyl group act as an acid when dissolved in water.

8 0
3 years ago
You discover some bones that have roughly %s as much carbon-14 in them as
Dafna1 [17]

Answer:

150 years i guess so? im nkt sure

4 0
3 years ago
Read 2 more answers
Brian has an object suspended in the air. It has a mass of 100 kg and is 25 meters above the ground. What is the object’s potent
MatroZZZ [7]
The answer is 24500 joule
7 0
2 years ago
Read 2 more answers
Other questions:
  • He concentration of pb2+ in a commercially available standard solution is 1.00 mg/ml. what volume of this solution should be dil
    13·1 answer
  • Is it possible to decrease resistance of the wire without changing the material it's made out of?
    13·1 answer
  • What atomic nucleus has the fewest protons
    9·1 answer
  • A 250-mL glass bottle was filled with 242mL of water at 20°C and tightly capped. it was then left outdoor overnight, where the a
    7·2 answers
  • Should have only one variable <br> what is the word to that definition
    14·1 answer
  • Consider a large number of hydrogen atoms with electrons randomly distributed in the n = 1, 2, 3, and 4 orbits. How many differe
    7·1 answer
  • Help I will mark brainliest
    11·1 answer
  • How important is economic in your everyday life
    14·1 answer
  • Hydrogen is considered to be a (metal, non-
    5·1 answer
  • How many valence electrons are in Lead(IV)
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!