Question

Buffers. A buffer solution is prepared which contains 1.00 M HF and 1.40 M NaF. (a) What is the pH of the buffer solution? (The Ka of HF is 3.5×10^-4.) (b) What will the pH of the buffer solution be if 50.0 mL of 2.00 M HCl is added to one liter of the buffer solution? 2. Buffers. Calculate the pH of a buffer prepared by mixing 250.0 mL of 0.10 M NH3 with 125.0 mL of 0.10 M NH4Cl. (For NH3, Kb = 1.8×10^-5.)

Name: 1 buffers a buffer solution is prepared which contains 100 m hf and 140 m naf a what is the ph of the buffer solution the ka of hf is 3510 4 b what will the ph of the buffer solution be if 5 77018
Uploaded: 2022-01-10T09:46:45-08:00
Duration: 3 min 27 s
Channel: Dinesh Singh
Description: 1 buffers a buffer solution is prepared which contains 100 m hf and 140 m naf a what is the ph of the buffer solution the ka of hf is 3510 4 b what will the ph of the buffer solution be if 5 77018

          Buffers. A buffer solution is prepared which contains 1.00 M HF and 1.40 M NaF.
(a) What is the pH of the buffer solution?
(The Ka of HF is 3.5×10^-4.)
(b) What will the pH of the buffer solution be if 50.0 mL of 2.00 M HCl is added to one liter of the buffer solution?
2. Buffers. Calculate the pH of a buffer prepared by mixing 250.0 mL of 0.10 M NH3 with 125.0 mL of 0.10 M NH4Cl.
(For NH3, Kb = 1.8×10^-5.)

Added by Sean W.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Dinesh Singh

01/10/2022

Step 1

Given: Ka of HF = 3.5×10^-4, [HF] = 1.00 M, [NaF] = 1.40 M Calculate pKa: pKa = -log(Ka) = -log(3.5×10^-4) = 3.45 Calculate pH using Henderson-Hasselbalch equation: pH = pKa + log([NaF]/[HF]) = 3.45 + log(1.40/1.00) = 3.59 Therefore, the pH of the buffer Show more…

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Buffers. A buffer solution is prepared which contains 1.00 M HF and 1.40 M NaF. (a) What is the pH of the buffer solution? (The Ka of HF is 3.5×10^-4.) (b) What will the pH of the buffer solution be if 50.0 mL of 2.00 M HCl is added to one liter of the buffer solution? 2. Buffers. Calculate the pH of a buffer prepared by mixing 250.0 mL of 0.10 M NH3 with 125.0 mL of 0.10 M NH4Cl. (For NH3, Kb = 1.8×10^-5.)