Sodium bicarbonate, NaHCO 3 , is the sodium salt of carbonic acid (H 2 CO 3 ), pK a = 6.37. Which of the substances shown in Problem 2-44 [Acetone (pK a =19.3), 2, 4-pentanedione (pK a =9.0), phenol (pK a =9.9), Acetic acid (pK a = 4.76)] will react significantly with sodium bicarbonate is to be stated. Concept introduction: An ion which is a weak base can deprotonate only when the substance reacting with it has a pK a value than that of its parent acid. To determine: Which of the substances shown in Problem 2-44 [Acetone (pK a =19.3), 2, 4-pentanedione (pK a =9.0), phenol (pK a =9.9), Acetic acid (pK a = 4.76] will react significantly with sodium bicarbonate. pK a of carbonic acid, = 6.37.

Question

Sodium bicarbonate (baking soda), Na(HCO3), pKb = 8, is kept in almost all chemistry labs as a safety chemical for cleaning up spills of strong acids or strong bases. Briefly describe how it can react with and partially neutralize both strong acids and strong bases. Na2(CO3) has a pKb = 4, while H2CO3 ahs a pKa = 6

Answer 1

Question

Chapter 2.SE, Problem 52AP

Interpretation Introduction

Interpretation:

Sodium bicarbonate, NaHCO₃, is the sodium salt of carbonic acid (H₂CO₃), pK_a = 6.37. Which of the substances shown in Problem 2-44 [Acetone (pK_a =19.3), 2, 4-pentanedione (pK_a =9.0), phenol (pK_a =9.9), Acetic acid (pK_a = 4.76)] will react significantly with sodium bicarbonate is to be stated.

Concept introduction:

An ion which is a weak base can deprotonate only when the substance reacting with it has a pK_a value than that of its parent acid.

To determine:

Which of the substances shown in Problem 2-44 [Acetone (pK_a =19.3), 2, 4-pentanedione (pK_a =9.0), phenol (pK_a =9.9), Acetic acid (pK_a = 4.76] will react significantly with sodium bicarbonate. pK_a of carbonic acid, = 6.37.

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