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
elena-s [515]
3 years ago
10

What is the pH of a 0.300 M NH₃ solution that has Kb = 1.8 × 10⁻⁵ ? The equation for the dissociation of NH₃ is: NH₃ (aq) + H₂O

(l) ⇄ NH₄⁺ (aq) + OH⁻ (aq)
Chemistry
1 answer:
nalin [4]3 years ago
8 0

Answer:

11.4

Explanation:

Step 1: Given data

  • Concentration of the base (Cb): 0.300 M
  • Basic dissociation constant (Kb): 1.8 × 10⁻⁵

Step 2: Write the dissociation equation

NH₃(aq) + H₂O(l) ⇄ NH₄⁺(aq) + OH⁻(aq)

Step 3: Calculate the concentration of OH⁻

We will use the following expression.

[OH^{-} ]=\sqrt{Kb \times Cb } = \sqrt{1.8  \times 10^{-5} \times 0.300 } = 2.3 \times 10^{-3} M

Step 4: Calculate the pOH

We will use the following expression.

pOH =-log[OH^{-} ]= -log(2.3 \times 10^{-3} M) = 2.6

Step 5: Calculate the pH

We will use the following expression.

pH+pOH=14\\pH = 14-pOH = 14-2.6 = 11.4

You might be interested in
Which subshells (s, p, d, f, or g) can have electrons with the indicated magnetic quantum number (ml)?
amm1812

Answer:

=3 means is 3 or greater so that would be f and g subshells

=0 means is 0 or greater so that would be s, p, d, f and g subshells

=1 means is 1 or greater so that would be p, d, f, and g subshells

=4 means is 4 or greater so that would be g only

4 0
2 years ago
ppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppplllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
sp2606 [1]

Answer:

YIkES One thing u can do i ask your teacher about it or say that u need help with it the cant make fun of u because u need help with your work.

8 0
3 years ago
Read 2 more answers
A change in the core would have the greatest effect on what?
Misha Larkins [42]
<span>The magnetic field of the Earth serves a useful purpose in deflecting Solar radiation. Without the magnetic field there is much more charged-particle radiation striking the surface. The auroras would occur everywhere instead of at the magnetic poles. Compass needles wouldn't work, and then they would flip direction.. The magnetic field IS DECREASING and could go to zero and reverse sometime in the next few tens-of-thousands of years.</span>
6 0
3 years ago
Pls help me I have 5 mins Science is a unique field of thought because it relies on _______ to describe the world
Pani-rosa [81]
Most reasonable answer:
Observations and experimentation
5 0
2 years ago
Someone help1!1!1!1!!!!!
alisha [4.7K]
The question is cut off in the picture
7 0
3 years ago
Other questions:
  • Which is an unnecessary rule for writing chemical formulas?
    8·1 answer
  • How many grams of water can be formed when 80 grams of sodium hydroxide (NaOH) reacts with an excess of sulfuric acid, H2SO4, in
    6·1 answer
  • Hydrogen bonds are approximately _____% of the bond strength of covalent c-c or c-h bonds.
    7·1 answer
  • For the decomposition of calcium carbonate, consider the following thermodynamic data (Due to variations in thermodynamic values
    9·1 answer
  • CHEMISTRY OuO Help please
    7·1 answer
  • A compound that contains only carbon and hydrogen that produces carbon dioxide and water when burned is called?
    8·1 answer
  • A bond formed when atoms share electrons is a(n) __________.
    6·1 answer
  • Which of the following elements does NOT follow the standard election caliguration rules?
    9·1 answer
  • Show is a pedigree chart. the chart shows that sally is carrier for red-green color blindness​
    6·1 answer
  • Why does an object with less mass move faster after a collision with an object with more mass?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!