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Chapter 9: Q26P (page 209)

Describe how to prepare 100mLof0.200Macetate buffer, pH5.00,starting with pure liquid acetic acid and solutions containing ~3MHCIand~3MNaOH

Short Answer

Expert verified

The steps for preparing acetate buffer:

  1. Weigh 0.200 mol acetic acid and mix with 80 mL of water
  2. Calculate the pH of solution
  3. Add NaOH into solution until pH =5
  4. Transfer the solution to flask
  5. Dilute to mark (total 100mL) and mix well

Step by step solution

01

Define buffer solution

A buffer solution is the one which doesnot change its pH upon adding acid or base given acetic acid and we have 3MNaOH and 3MHCI and we need 100mL of 0.200M acetate buffer.

The steps are:

  1. Weigh 0.200mol acetic acid and mix with 80ml of water then calculate pH of this.
  2. Then add solution until pH becomes 5.
  3. Now transfer the solution to flask.
  4. Dilute to mark and mix well.

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