The value of Ka in water at 25 C for propionic acid (C2H5CO2H)is 3 4 x...

proponoic acid is a week acid construct the ICE table C2H5CO2 ....

The value of Ka in water at 25 Â°C for propionic acid (C2H5CO2H) is 3.4 x...

Free

90.2K

Verified Solution

Question

Chemistry

The value of Ka in water at 25 Â°C for propionic acid (C2H5CO2H)is 3.4 x 10-5 M. What is the pH of a 0.020 M aqueous solution ofpropionic acid?

Answer & Explanation Solved by verified expert

3.7 Ratings (442 Votes)

proponoic acid is a week acid

construct the ICE table

Â Â Â Â Â Â Â Â Â C2H5CO2H + H2O <------> C2H5CO2^- + H3O+

IÂ Â Â Â Â Â Â Â Â Â Â 0.02Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0

CÂ Â Â Â Â Â Â Â Â Â -xÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â +xÂ Â Â Â Â Â Â Â Â Â Â Â Â Â +x

EÂ Â Â Â Â Â Â Â Â Â Â 0.02-xÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â +xÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â +x

now dissociation constant

Ka = [C2H5CO2-][H3O+] / [C2H5CO2H]

3.4 x 10^-5 = [x][x] / [0.02-x]

x² + x 3.4 * 10-5 - 6.8 x 10^-7 = 0

solve the quadratic equation to get x value

x = 0.0008078 M = [H3O+]

now

pH = -log[H3O+] = -log[0.0008078] = 3.09

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Zin AI - Your personal assistant for all your inquiries!

Become a Member

The value of Ka in water at 25 Â°C for propionic acid (C2H5CO2H) is 3.4 x...

Free

90.2K

Verified Solution

Question

Chemistry

The value of Ka in water at 25 Â°C for propionic acid (C2H5CO2H)is 3.4 x 10-5 M. What is the pH of a 0.020 M aqueous solution ofpropionic acid?

Answer & Explanation Solved by verified expert

Get Answers to Unlimited Questions

Membership Benefits:

Other questions asked by students

Amazon's third-largest market is the United Kingdom. In 2019, the employees at a local firm in...

yâ€² = t, y(0) = 1, solution: y(t) = 1+t2/2 yâ€² = 2(t + 1)y, y(0)...

Critics argue that affirmative action has become \"reverse discrimination.\" They argue that it divides society by...

Give two examples of pressure sensors in the passenger car and discuss how each one works...

The data fatal accidents within the age group by gender Complete parts a through c...

The Music World Store carries a large inventory of guitars and other musical instruments. Company...

What process is used to assign costs in an ABC system? Provide numerical example

Troy Engines, Limited, manufactures a variety of engines for use in heavy equipment. The company...

Por qu una empresa podra querer reducir su ciclo de conversin de efectivo y cules...

View Policies Current Attempt in Progress You and several classmates are studying for the next...

The shareholder's equity section of Chen Industries Limited at November 30, 2022 is shown below:...

My problem states different numbers to be used. How do I get the answer for...