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
Orlov [11]
3 years ago
14

"acid is responsible for the odor in rancid butter. a solution of 0.25 m butyric acid has a ph of 2.71. what is the ka for"

Chemistry
2 answers:
Salsk061 [2.6K]3 years ago
8 0

Answer:- The Ka for the acid is 1.53*10^-^5 .

Solution:- In general, monoprotic acid could be represented by HA. The dissociation equation for the ionization of HA is written as:

HA(aq)\rightarrow H^+(aq) + A^-(aq)

Now, we make the ice table for this equation as:

HA(aq)\rightarrow H^+(aq) + A^-(aq)

I 0.25 0 0

C -X +X +X

E (0.25 - X) X X

where, I stands for initial concentration, C stands for change in concentration and E stands for equilibrium concentration.

X is the change in concentration and from ice table it's same as the concentration of hydrogen ion that is calculated from given pH.

Ka = [H^+][A^-]\frac{1}{HA}

Where, Ka is the acid ionization constant. Let's plug in the values.

Ka = \frac{X^2}{0.25-X}

Let's calculate the value of X first using the equation:

pH = -log[H^+][/tex]

on taking antilog ob above equation we get:

[H^+]=10^-^p^H

[H^+]=10^-^2^.^7^1

[H^+] = 0.00195

So, X = 0.001195

Let's plug in this value of X in the equation:-

Ka=\frac{(0.00195)^2}{0.25-0.00195}

Ka=1.53*10^-^5

So, the value of Ka for butyric acid is 1.53*10^-^5 .

andrezito [222]3 years ago
7 0

Dissociation of butyric acid can be represented as:

HC₄H₇O₄------> H⁺ + C₄H₇O₄⁻

So its dissociation constant can be calculated as:

Ka={[H⁺][C₄H₇O₄⁻ ]}/[HC₄H₇O₄]

As pH = -log[H⁺]

2.71 = -log[H⁺]

[H⁺]= 0.0019

[H⁺]=[C₄H₇O₄⁻ ]=0.0019

As [HC₄H₇O₄]= 0.25M

So Ka={[H⁺][C₄H₇O₄⁻ ]}/[HC₄H₇O₄]

=(0.0019×0.0019)/0.25

=0.000014

You might be interested in
How is the climate in San Francisco, California different from Wichita, Kansas
natulia [17]
One is closer to the equator so be must be warmer
7 0
3 years ago
The last intermediate in citric acid cycle is:_________
GenaCL600 [577]

The last intermediate in citric acid cycle is Oxaloacetic acid.

<h3>What is Citric Acid Cycle?</h3>

Organic molecule HOC(CO2H)(CH2CO2H)2 is the chemical formula for citric acid. It is a weak organic acid that is colorless. Citrus fruits naturally contain it. It is a biochemical intermediary in the citric acid cycle, which is a component of all aerobic organisms' metabolism.

Every year, more than two million tons of citric acid are produced. It is frequently used as a flavoring, an acidifier, and a chelating agent.

Citrates, which include salts, esters, and the polyatomic anion present in solution, are derivatives of citric acid. Trisodium citrate is an example of the former; triethyl citrate is an example of an ester.

Learn more about citric acid with the help of the given link:

brainly.com/question/15582668

#SPJ4

7 0
8 months ago
A student, wearing chemical safety goggles and a lab apron, is to perform a laboratory test to determine the pH value of two dif
Setler79 [48]
They should probably wear gloves. A pH of 2.0 is a very strong acid, and it can easily irritate their hands. They should also remember to NEVER touch their face, mouth, etc. and to keep all chemicals on the laboratory table.
6 0
2 years ago
What is the correct electron configuration for 48Cd
kherson [118]

Answer:

1s² 2s²2p⁶ 3s²3p⁶ 4s²3d¹⁰4p⁶ 5s²4d¹⁰

Explanation:

Cd is the last element in the 4d block of the Periodic Table (see Figure).

It has the electron configuration of Kr, plus filled 5s and 4d subshells.

Thus, its electron configuration is

1s² 2s²2p⁶ 3s²3p⁶ 4s²3d¹⁰4p⁶ 5s²4d¹⁰

3 0
2 years ago
Read 2 more answers
A0.255g sample of antacid was tested and neutralized 23.8mL of 0.1 M HCI. How many ml of acid
CaHeK987 [17]

Answer:

iztsotspysyx

Explanation:

oopcyxlyld

8 0
3 years ago
Other questions:
  • Carbon dioxide is a colorless odorless gas why is it considered a pollutant?
    13·2 answers
  • Identify the products in the equation below (the “I” is Iodine—to differentiate capital “I” from lowercase “l”)
    7·1 answer
  • About one-third of the toxic metal, mercury (Hg), is released into the air from natural sources, such as rocks, soil, volcanoes,
    7·1 answer
  • What is the molar mass of tin?
    11·1 answer
  • ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,n
    14·1 answer
  • Consider the above reaction. If some CO2 were removed from the container, what would the reaction do in an attempt to replace th
    13·1 answer
  • As you were climbing a a mountain, you noticed that rocks were crumbling below your feet and moving down the mountain. What two
    13·1 answer
  • Who was one of the first scientists to realize the effects of CO2 in the atmosphere?
    13·1 answer
  • Which element below could be an isotope of this atom?
    8·1 answer
  • Weathering and Erosion Unit Test
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!