The weakest acid and weakest base in below table should be determined. Concept introduction: According to Bronsted-Lowry concept, substance that donates proton is termed as acid while that accepts or gains protons is called base. Species formed after loss of protons from acids are known as their respective conjugate bases whereas conjugate acid is produced by addition of protons to base. Strength of conjugate acids and conjugate bases are inversely related to strengths of their respective bases and acids. According to Lewis concept, substance that donates electron pair is termed as base while that accepts or gains electron pair is called acid. For example, BF 3 is electron-deficient compound and can easily accept electrons so it is Lewis acid. But NH 3 has lone pair of electrons that it can donate easily so it acts as Lewis base. According to Arrhenius concept, substances that donate hydrogen ions in solutions are known as acids while bases are substances that release hydroxide ions in solutions.

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option choice: Isoleucine Histidine Threonine Alanine Lysine Aspartate Tryptophan Tyrosine Leucine Arginine Cysteine Asparagine Valine Glutamine Glycine Methionine Serine Proline Phenylalanine Glutamate

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Chapter 4, Problem 44CTQ

Interpretation Introduction

Interpretation: The weakest acid and weakest base in below table should be determined.

Concept introduction: According to Bronsted-Lowry concept, substance that donates proton is termed as acid while that accepts or gains protons is called base. Species formed after loss of protons from acids are known as their respective conjugate bases whereas conjugate acid is produced by addition of protons to base. Strength of conjugate acids and conjugate bases are inversely related to strengths of their respective bases and acids.

According to Lewis concept, substance that donates electron pair is termed as base while that accepts or gains electron pair is called acid. For example, BF3 is electron-deficient compound and can easily accept electrons so it is Lewis acid. But NH3 has lone pair of electrons that it can donate easily so it acts as Lewis base.

According to Arrhenius concept, substances that donate hydrogen ions in solutions are known as acids while bases are substances that release hydroxide ions in solutions.

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option choice: Isoleucine Histidine Threonine Alanine Lysine Aspartate Tryptophan Tyrosine Leucine Arginine Cysteine Asparagine Valine Glutamine Glycine Methionine Serine Proline Phenylalanine Glutamate

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Part C The perspective formula of isoleucine, an amino acid, is provided below. HOOC H₂NIC H 川 CH3 CH,CH3 Draw the Newman projection in staggered conformation for isoleucine by viewing the molecule along the C-2-C-3 bond. 1. Edit the Newman projection on the canvas. 2. Replace the appropriate hydrogens with the appropriate -CH3 or other groups. 3. If you need to start over, Undo or choose a Newman projection from the Templates toolbar (bottom). Important: Never delete the hydrogen atoms or bonds directly attached to the template, and do not move them by dragging or dropping them. That will break the projections structures. Only replace them! ▸ View Available Hint(s) 0 2 H± 3D EXP. L ד י CONT. 2 H 0 N о