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
wariber [46]
3 years ago
14

The weak acid HA is 2% ionized (dissociated) in a 0.20 M solution.

Chemistry
1 answer:
nekit [7.7K]3 years ago
7 0

Answer:

1. Ka = 8.16x10⁻⁵

2. pH = 2.40

Explanation:

1. The dissociation of a weak acid in water occurs as follows:

HA ⇄ H⁺ + A⁻

Ka = [H⁺] [A⁻] / [HA]

As 2% of the 0.20M solution is dissociated:

[H⁺] = [A⁻] = 0.20M * 2% = 0.004M -As H⁺ and A⁻ comes from the same reaction, their concentrations are the same

[HA] = 0.20M * 98% = 0.196M

Ka = (0.004)² / (0.196M) = 8.16x10⁻⁵

2. pH = -log [H⁺] = -log [0.004M]

<h3>pH = 2.40</h3>
You might be interested in
What is the average deer per month
Nuetrik [128]

Answer:

25

Explanation:

explain no need it is perfect

8 0
2 years ago
Read 2 more answers
Which part of the atom cannot have its location accurately determined and is modeled by a cloud around the center of the atom? A
Tju [1.3M]

Answer:

Electron

Explanation:

The answer would be the electron because it is constantly moving so its location cannot be accurately determined

3 0
2 years ago
Read 2 more answers
If the melting point of a certain amount of a solid is 50 degrees, what is the melting point of half that amount of the solid? 5
borishaifa [10]
The answer is 25 degrees.
4 0
3 years ago
There are many positive and negative aspects associated with nuclear power. What is a positive aspect associated with nuclear po
Keith_Richards [23]

Answer: A)There is a high ratio of energy to cost

Positives:

A Chunk of Uranium can power a city a lot longer than a chunk of coal. 
It also does not contribute to pollution since what comes out of the tower is steam.

Negatives:

It is very expensive to build and maintain a nuclear power plant at first so investors whom want money up front are more reluctant to loan money for one.

If the plant does melt down it is very bad for the enviroment and its people, for example Chernobyl Nuclear Power Plant in the Ukraine will not be able to be lived in for approximently 20,000 years. 
5 0
3 years ago
Read 2 more answers
The ka of hypochlorous acid (hclo) is 3.0 ⋅ 10−8 at 25.0 °c. calculate the ph of a 0.0375m hypochlorous acid solution.
Scrat [10]
We can set up an ICE table for the reaction:                      
                      HClO          H+     ClO-
Initial              0.0375       0        0
Change         -x               +x      +x
Equilibrium    0.0375-x     x        x

We calculate [H+] from Ka:     
     Ka = 3.0x10^-8 = [H+][ClO-]/[HClO] = (x)(x)/(0.0375-x)

Approximating that x is negligible compared to 0.0375 simplifies the equation to         
     3.0x10^-8 = (x)(x)/0.0375     
     3.0x10^-8 = x2/0.0375     
     x2 = (3.0x10^-8)(0.0375) = 1.125x10^-9     
     x = sqrt(1.125x10^-9) = 0.0000335 = 3.35x10^-5 = [H+]
in which 0.0000335 is indeed negligible compared to 0.0375.

We can now calculate pH:     
     pH = -log [H+] = - log (3.35 x 10^-5) = 4.47
6 0
3 years ago
Other questions:
  • How were fossil symbols and mountain belts helpful in deciding where to move the continents
    9·1 answer
  • 4. At what phase of the cell cycle does the genetic material double?<br><br> BRIANLIST!
    11·2 answers
  • Calculate the ratio of naf to hf required to create a buffer with ph = 4.05.
    6·2 answers
  • If a car has a force of 490 N forward and encounters a backwards force of
    5·1 answer
  • Please help I will give ALOT OF BRAINLY POINTS!!!!!
    10·2 answers
  • 5.
    10·1 answer
  • Si escuchas a alguien decir que la corriente eléctrica en un sircuito sale por el polo negativo de la pila y entra por el polo p
    10·1 answer
  • Hiii please help me for balancing chemical equations:
    10·2 answers
  • Question 8 (1 point)
    7·2 answers
  • The following are electronegativity. What value should be where the M is?0.981.57M2.553.043.443.98No data
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!