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
sleet_krkn [62]
3 years ago
11

A scientist prepared an aqueous solution of a 0.45 M weak acid. The pH of the solution was 2.72. What is the percentage ionizati

on of the acid? 19% 0.42% 42% 0.19%
Chemistry
2 answers:
aleksandr82 [10.1K]3 years ago
5 0

The answer is 0.42% just did it ;)

aleksandr82 [10.1K]3 years ago
4 0

Answer:

0.42%

Explanation:

<em>∵ pH = - log[H⁺].</em>

2.72 = - log[H⁺]

∴ [H⁺] = 1.905 x 10⁻³.

<em>∵ [H⁺] = √Ka.C</em>

∴ [H⁺]² = Ka.C

∴ ka = [H⁺]²/C = (1.905 x 10⁻³)²/(0.45) = 8.068 x 10⁻⁶.

<em>∵ Ka = α²C.</em>

Where, α is the degree of dissociation.

<em>∴ α = √(Ka/C) </em>= √(8.065 x 10⁻⁶/0.45) = <em>4.234 x 10⁻³.</em>

<em>∴ percentage ionization of the acid = α x 100</em> = (4.233 x 10⁻³)(100) = <em>0.4233% ≅ 0.42%.</em>

You might be interested in
Complete combustion of 2.0 metric tons of coal to gaseous carbon dioxide releases 6.6X10¹⁰ J of heat. Convert this energy to
Jobisdone [24]

6.6 × 10^{10} J = 6.2 × 10^{7} British thermal units

First of all, we should know that 1 British thermal unit = 1055 Joules.

From question, heat = 6.6 × 10^{10} J

1 BTU = 1055 J

6.6 × 10^{10} J = \frac{1}{1055} ×  6.6 × 10^{10} British thermal units

                   = 6.2 × 10^{7} British thermal units

1000 Joules = 1 kilojoule

A kilojoule is a unit of measure of energy, in the equal way that kilometers degree distance. meals energy used to be measured in energy  and some international locations still use those gadgets.

The power we get from foods and drinks is measured in kilojoules. that is the metric time period for calorie. Kilojoules and energy constitute the equal aspect. One calorie is ready four kilojoules.

Calorie a unit for measuring warmth same to the quantity of warmth required to elevate the temperature of one gram of water one diploma Celsius.

Learn more about kilojoules here :- brainly.com/question/490326

#SPJ4

4 0
1 year ago
How can we make use of acids or bases to Prevent the growth of microorganisms in swimming pools?
pentagon [3]
By putting smarticle particles 
8 0
3 years ago
PLSSS HELP I AM STUCK ON THIS PROBLEM!!!
DENIUS [597]

Answer:

i can't read it.. maybe upload a visible picture?

6 0
2 years ago
If calcium chloride is dissolved in water, what can be said about the concentration of the calcium ion? a. It has the same conce
e-lub [12.9K]

Answer:

b. Its concentration is half that of the chloride ion

Explanation:

As the calcium chloride formula is CaCl2

CaCl2 <--> Ca + 2 Cl-

4 0
3 years ago
Question 7 unsaved liquid water can store more heat energy than an equal amount of any other naturally occurring substance becau
Paul [167]
Has the highest specific heat.
___________
3 0
3 years ago
Other questions:
  • The device shown operates based on a capacitive touch screen. This means that it utilizes an electric current to operate. Why wi
    10·2 answers
  • Which factors would negatively impact the bodies digestive system
    6·1 answer
  • Which produces the greatest number of ions when one mole dissolves in water?
    10·1 answer
  • How could you increase the potential energy of an apple you were holding?
    15·1 answer
  • A 100.00-mL sample of 0.2000M glycine, A+ form (see structure below), was titrated with 0.2000M of NaOH. Ka1 of glycine = 3.16x1
    6·1 answer
  • Recall that atoms gain or lose electrons to become ions. So, an ion has a different number of electrons than its corresponding n
    5·1 answer
  • Aquien le elimina las respuestas
    15·1 answer
  • How to get pH from OH-
    14·1 answer
  • I don't understand this problem<br>?Mg+?02=?Mg0​
    7·1 answer
  • in the following reaction, how does increasing the pressure affect the equilibrium? 2 so2 (g) o2 (g) ⇌ 2 so3 (g) heat
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!