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
Travka [436]
3 years ago
8

Methylamine (ch3nh2) is a weakly basic compound. calculate the kb for methylamine if a 0.253 m solution is 4.07% ionized.

Chemistry
1 answer:
MariettaO [177]3 years ago
8 0
Answer is: Kb for methylamine is 4.37·10⁻⁴.<span>
Chemical reaction: CH</span>₃NH₂ + H₂O → CH₃NH₃⁺ + OH⁻.
c(CH₃NH₂) = 0.253 M.
α = 4.07% ÷ 100% = 0.0407.
[CH₃NH₃⁺] = [OH⁻] = c(CH₃NH₂) · α.
[CH₃NH₃⁺] = [OH⁻] = 0.253 M · 0.0407.
[CH₃NH₃⁺] = [OH⁻] = 0.0103 M.
[CH₃NH₂] = 0.253 M - 0.0103 M.
[CH₃NH₂] = 0.2427 M.
Kb = [CH₃NH₃⁺] · [OH⁻] / [CH₃NH₂]. 
Kb = (0.0103 M)² / 0.2427 M.
Kb = 4.37·10⁻⁴.
You might be interested in
In the equation for the formation of magnesium sulfide shown, which atom gains electrons?
Zarrin [17]

S + 2e⁻ → S²⁻ (sulfur will gain electrons)

Mg - 2e⁻ → Mg²⁺ (magnesium will lose electrons)

Magnesium is a metal which tends to give electrons which are received by the sulfur, which is a nonmetal and tends to gain electrons.

7 0
3 years ago
Read 2 more answers
What is the empirical formula
Zolol [24]
The Empirical Formula is
<span>a formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.</span>
7 0
3 years ago
The reusable booster rockets of the U.S. space shuttle use a mixture of aluminum and ammonium
kolezko [41]

Answer:

The mass will be 100

Explanation:

4 0
3 years ago
How is a unit cell like a formula unit?
frutty [35]

Answer:

Understanding the unit cell of a crystalline solid will help you in determining the empirical formula of the ionic solid compound because they both represent the smallest portion of the whole crystalline solid proportion.

Explanation:

A unit cell is the smallest portion of a crystal lattice, that can show the 3 dimensional pattern of the whole crystal.A formula unit is the lowest whole number ratio of ions in a an ionic compound.By considering the smallest repeating units/ unit cell, you can describe the structure of a crystalline solid.Knowing this can help in determining the empirical formula of the ionic solid compound.

8 0
3 years ago
9. Typically meringues have cream of tarter added to them. Why don't you think we don't have them in our recipe?
VLD [36.1K]
Some meringues are different and don't require the same ingredients just follow the recipe as said!!! Good luck
3 0
3 years ago
Other questions:
  • Explain how the ecosystem that you selected follows the law of conservation of mass and the law of conservation of energy. It is
    10·1 answer
  • Balance the following chemical equation : C7H6O3 + C4H6O3 —&gt; C9H8O4 + H2O
    15·1 answer
  • If 1.75 L of a gas is at 700. K and is under 250. kPa of pressure, what will the new
    12·1 answer
  • A container of gas is at a pressure of 1.3x10^5 Pa and a volume of 6 m^3. How much work is done by the gas if it expands at a co
    11·1 answer
  • ASAP
    9·1 answer
  • *WILL GIVE BRAINLIEST TO CORRECT ANSWER *<br> **QUESTION IS IN PICTURE**
    8·2 answers
  • Which process occurs when sand particles settle out of the water or
    5·1 answer
  • Which of the following is NOT an abiotic factor that influences an ecosystem?
    12·1 answer
  • C. 0.0023 moles of CO2
    11·1 answer
  • The mass of a quantity of Cl gas (70,906 g/mol) that occupies<br> 50.0L at 27.0°C and 721 mm Hg is:
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!