The importance to allow the liquid level in the column to drop to the level of alumina before the solution of the compound is separated should be explained. Concept introduction: A separation technique used for the segregation of components of chemical mixture based on the difference between the adsorption of different components in stationary and mobile phase is called column chromatography. It is used for purification or segregation of compounds. It consists of two phases namely: Stationary phase (solid) Mobile phase (generally liquid) Silica gel is commonly used as the stationary phase.

Question

Q2: Ranking Acidity a) Rank the labeled protons in the following molecule in order of increasing pKa. Briefly explain the ranking. Use Table 2.2 as reference. Ha Нь HC H-N Ha OHe b) Atenolol is a drug used to treat high blood pressure. Which of the indicated N-H bonds is more acidic? Explain. (Hint: use resonance structures to help) Name the functional groups on atenolol. H H-N atenolol Ν H-N OH Н

Answer 1

Question

Chapter 9, Problem 4Q

Interpretation Introduction

Interpretation:

The importance to allow the liquid level in the column to drop to the level of alumina before the solution of the compound is separated should be explained.

Concept introduction:

A separation technique used for the segregation of components of chemical mixture based on the difference between the adsorption of different components in stationary and mobile phase is called column chromatography.

It is used for purification or segregation of compounds. It consists of two phases namely:

Stationary phase (solid)

Mobile phase (generally liquid)

Silica gel is commonly used as the stationary phase.

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Q2: Ranking Acidity a) Rank the labeled protons in the following molecule in order of increasing pKa. Briefly explain the ranking. Use Table 2.2 as reference. Ha Нь HC H-N Ha OHe b) Atenolol is a drug used to treat high blood pressure. Which of the indicated N-H bonds is more acidic? Explain. (Hint: use resonance structures to help) Name the functional groups on atenolol. H H-N atenolol Ν H-N OH Н

Answer d, e, and f

If the rotational constant of a molecule is B = 120 cm-1, it can be stated that the transition from 2←1:a) gives rise to a line at 120 cm-1b) is a forbidden transitionc) gives rise to a line at 240 cm-1d) gives rise to a line at 480 cm-1