The p K a values of acidic hydrogen of the given species are to be determined using table 3.1. Concept introduction: The strength of an acid is generally described in terms of acidity constant ( K a ) and p K a values. A large value of K a indicates that the acid is strong and a small value of K a indicates a weak acid. The value of p K a of a reagent can be mathematical defined as p K a = − log( K a ) The higher is the dissolution constant, that is, the reagent can produce more ions when dissolved in water, the stronger is the acid. Thus, by the above relation, strong acids have low p K a . The stronger the acid, the weaker is its conjugate base. Larger the value of p K a of the conjugate base, the stronger is the acid. The pK a value gives the measure of strength of an acid. The smaller the p K a value, the stronger is the acid. The larger the p K a value, the weaker is the acid. Alcohol is too weak an acid to ionize in the presence of strong sulfuric acid. The ester is nonelectrolyte and will not ionize in water.

Question

Want to see the full answer?

Answer 1

Question

Chapter 3, Problem 2LGP

Interpretation Introduction

Interpretation:

The p K_a values of acidic hydrogen of the given species are to be determined using table 3.1.

Concept introduction:

The strength of an acid is generally described in terms of acidity constant (Ka) and pKa values.

A large value of Ka indicates that the acid is strong and a small value of Ka indicates a weak acid.

The value of pK_a of a reagent can be mathematical defined as

pKa= −log(Ka)

The higher is the dissolution constant, that is, the reagent can produce more ions when dissolved in water, the stronger is the acid. Thus, by the above relation, strong acids have low pK_a.

The stronger the acid, the weaker is its conjugate base.

Larger the value of pK_a of the conjugate base, the stronger is the acid.

The pKa value gives the measure of strength of an acid. The smaller the pK_a value, the stronger is the acid. The larger the pK_a value, the weaker is the acid.

Alcohol is too weak an acid to ionize in the presence of strong sulfuric acid.

The ester is nonelectrolyte and will not ionize in water.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

(a 4 shows scanning electron microscope (SEM) images of extruded actions of packing bed for two capillary columns of different diameters, al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the same stationary phase, spherical particles with 1-um diameter. A) When the columns were prepared, the figure shows that the column with the larger diameter has more packing irregularities. Explain this observation. B) Predict what affect this should have on band broadening and discuss your prediction using the van Deemter terms. C) Does this figure support your explanations in application question 33? Explain why or why not and make any changes in your answers in light of this figure. Figure 4 SEM images of sections of packed columns for a) 750 and b) 30-um-i.d. capillary columns.³

fcrip = ↓ bandwidth Il temp 32. What impact (increase, decrease, or no change) does each of the following conditions have on the individual components of the van Deemter equation and consequently, band broadening? Increase temperature Longer column Using a gas mobile phase instead of liquid Smaller particle stationary phase Multiple Paths Diffusion Mass Transfer

34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.). A) Predict whether decreasing the column inner diameters increase or decrease bandwidth. B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or decreasing bandwidth as a function of i.d. and justify your answer. Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles. 35 20 H(um) 큰 20 15 90 0+ 1500 100 75 550 01 02 594 05 μ(cm/sec) 30 15 10