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
Ierofanga [76]
3 years ago
13

In an aqueous solution of a certain acid the acid is 4.4% dissociated and the pH is 3.03. Calculate the acid dissociation consta

nt Ka of the acid. Round your answer to 2 significant digits.
Chemistry
1 answer:
NeX [460]3 years ago
4 0

Answer:

4.1x10⁻⁵

Explanation:

The dissociation of an acid is a reversible reaction, and, because of that, it has an equilibrium constant, Ka. For a generic acid (HA), the dissociation happens by:

HA ⇄ H⁺ + A⁻

So, if x moles of the acid dissociates, x moles of H⁺ and x moles of A⁻ is formed. the percent of dissociation of the acid is:

% = (dissociated/total)*100%

4.4% = (x/[HA])*100%

But x = [A⁻], so:

[A⁻]/[HA] = 0.044

The pH of the acid can be calcualted by the Handersson-Halsebach equation:

pH = pKa + log[A⁻]/[HA]

3.03 = pKa + log 0.044

pKa = 3.03 - log 0.044

pKa = 4.39

pKa = -logKa

logKa = -pKa

Ka = 10^{-pKa}

Ka = 10^{-4.39}

Ka = 4.1x10⁻⁵

You might be interested in
For motion maps that illustrate accelerated motion what does a new level indicate
zhenek [66]
Oh that’s crazy I need help
3 0
3 years ago
Which of the following describes a chemical property of oxygen
monitta

Which of the following describes a chemical property of oxygen

8 0
2 years ago
When a hydrochloric acid solution is combined with
adoni [48]

Answer:

HCl(aq) + KOH(aq --> KCl(aq) + H₂O(l)

Explanation:

4 0
2 years ago
Thermal energy is the energy associated with...... lectric fields. being stored in chemical bonds. the pull of gravity. temperat
satela [25.4K]
Temperature. Thermal is heat energy.
7 0
2 years ago
Read 2 more answers
15. The starting diol for this molecule is
victus00 [196]

<h2>Answer with explanation </h2>

<h3><em>The starting diol for this molecule is :-</em></h3><h3><em>The starting diol for this molecule is :-D) ethan-1,2-diol.</em></h3>

<em>Hope </em><em>my </em><em>answer </em><em>is</em><em> helpful</em><em> to</em><em> you</em><em> </em><em>☺️</em>

3 0
3 years ago
Other questions:
  • A client at 39 weeks gestation with preeclampsia has a blood pressure of 170/100 mm Hg, 2+ proteinuria, and moderate peripheral
    6·1 answer
  • In the reaction n2 + 3h2 ---&gt; 2nh3, how many grams of nh3 are produced if 25.0 g n2 reacts with excess h2? question 10 option
    10·1 answer
  • A professional technician maintains and operates specialized scientific equipment true or false
    10·1 answer
  • Which element has a larger atomic radius than sulfur?
    8·1 answer
  • ANSWER FAST PLZ 25 POINTS!!!!!!!!!!!!!!!
    9·1 answer
  • A chemist added hydrochloric acid to a sample of baking soda in a beaker. Immediately, the mixture of the two chemicals began to
    12·2 answers
  • If 4.59 g of potassium reacts with 3.6 g of sulfur according to the following reaction, how many grams of potassium sulfide can
    6·1 answer
  • what would be the ph of an aqueous solution of sulphuric acid which is 5×10^_5 mol l^_1 in concentration​
    15·1 answer
  • Interpret diagrams wich diagram or diagrams represent a single elemnt
    11·1 answer
  • In your opinion, will all the objects in the Universe last forever? Justify your answer.​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!