A buffer contains 0.015 mol of lactic acid (pK₁ = 3.86) and 0.080 mol of sodium lactate per liter.H₂COHLactic acidOHCalculate the pH of the buffer.H₂C.Calculate the change in pH after adding 9.0 mL of0.10 M HCl to 1.0 L of the buffer.OOHSodium lactateCalculate the change in pH after adding 9.0 mL of0.10 M HCl to 1.0 L of pure water.O Na+buffer pH:buffer pH change:water pH change:unitsunits

Answered: A buffer contains 0.015 mol of lactic…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Question

A buffer contains 0.015 mol of lactic acid (pK₁ = 3.86) and 0.080 mol of sodium lactate per liter.
H₂C
OH
Lactic acid
OH
Calculate the pH of the buffer.
H₂C.
Calculate the change in pH after adding 9.0 mL of
0.10 M HCl to 1.0 L of the buffer.
O
OH
Sodium lactate
Calculate the change in pH after adding 9.0 mL of
0.10 M HCl to 1.0 L of pure water.
O Na+
buffer pH:
buffer pH change:
water pH change:
units
units

Expert Solution

Step 1

A buffer is a aqueous solution which is used to resist the pH change upon addition of acid or base. Buffer solutions are widely used for the reaction or process which need specific and stable pH. Buffers have a working pH window and capacity to maintain the buffering property, this tells the range within which the amount of acid or base can be neutralized without changing the pH and the amount by which it will change.