Logo
Home Study Material Contact Search
AI Chat FREE
  1. sciences
  2. chemistry
  3. calculate the ph of 0.125m of naac

Calculate the ph of 0.125M of NaAc

Free

70.2K

Verified Solution

Question

Chemistry

Calculate the ph of 0.125M of NaAc

Answer & Explanation Solved by verified expert
4.4 Ratings (661 Votes)

The give compound is a salt of sodium acetate (CH3COO-Na+)

The Ka of acetic acid = 1.8 X 10^-5

So Kb of acetic acid = Kw / Ka = 10^-14 / 1.8X 10^-5 = 5.56 X 10^-10

It will dissociate as

CH3COONa => CH3COO- + Na+

Now

             CH3COO- + H2O <------> CH3COO- + OH-

Initial          0.125                             0             0

Change        -x                                   x              x

Equilibrium 0.125-x                       x                  x

Kb = x^2 / (0.125-x)

x <<1 so will ignore in denominator

1.56 X 10^-10 = x^2 / 0.125

x^2 = 0.195 X 10^-10

x = 0.442 X 10^-5 = 4.42 X 10^-6 = [OH-]

pOH = -log[OH-] = -log[4.42 X 10^-6]

pOH = 5.35

pH = 14-5.35 = 8.65
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: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Biology
1.2K views

What is meant by an emergent property of a population of ants? That is, what structure...

Psychology
1.2K views

Both the Stoics and Frankl build their theories on the concept of the Logos. Briefly compare...

Biology
1.2K views

What structure is labeled as 3 2 3 1 5 4 Visceral sensory gray mater...

Physics
1.2K views

1 4 is used to cover one slit of Young s double slit experiment being...

Physics
1.2K views

Gas in a container is at a pressure of 1.8 atm and a volume of...

Statistics
1.2K views

1 Cigarette Tar and Nicotine The table below lists measured amounts mg of tar carbon...

Statistics
1.2K views

football game days Suppose that 100 days are randomly selected and the average daily revenue...

Accounting
1.2K views

The following financial statements apply to Zachary Company: Year 2 $ 221,000 Year 1 $...

Accounting
1.2K views

Joseph Company has an investment in assets of $450,000, income that is 10% of sales,...

Accounting
1.2K views

Naylor Company had $154,800 of net income in 2013 when the selling price per unit...

Accounting
1.2K views

Liabilities are $250,000. Owners equity is $100,000. What is the amount of ASSETS?

Finance
1.2K views

The category of securities with the highest historical risk premium is A. Large company stocks...