1 of 20 An amino acid is dissolved in solution at a pH which is the same as its isoelectric point Most of the amino acid molecules in solution will have an ionised carboxylic acid group O True O False o Don't know Most of the amino acid molecules in solution will have an ionised amine group True False Don't know O False O Don't know O True O False O Don't know Most of the amino acid molecules in solution will exhibit a net charge of zero True Lowering the pH will lower the zwitterion concentration

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter14: Acids And Bases
Section14.6: Molecular Structure And Acid Strength
Problem 14.16CE
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1 of 20
An amino acid is dissolved in solution at a pH which is the same as its isoelectric point
Most of the amino acid molecules in solution will have an ionised carboxylic acid group O True
False O Don't know
False O Don't know
Most of the amino acid molecules in solution will have an ionised amine group
True
Most of the amino acid molecules in solution will exhibit a net charge of zero
True
False
Don't know
Lowering the pH will lower the zwitterion concentration
True O False o Don't know
2 of 20
Liquid X has a surface tension value of 35 mNm1 and liquid Y has a surface tension value of 50 mNm1
The interfacial tension between the two liquids could be determined using the capillary rise method
True
False
Don't know
The cohesive forces in liquid Y are stronger than the cohesive forces in liquid X
True
False
Don't know
X will spread on Y more readily than Y will spread on X
False
True
Don't know
The work of adhesion is the work required to separate liquid X from liquid Y at their interface
True O False
O Don't know
Transcribed Image Text:1 of 20 An amino acid is dissolved in solution at a pH which is the same as its isoelectric point Most of the amino acid molecules in solution will have an ionised carboxylic acid group O True False O Don't know False O Don't know Most of the amino acid molecules in solution will have an ionised amine group True Most of the amino acid molecules in solution will exhibit a net charge of zero True False Don't know Lowering the pH will lower the zwitterion concentration True O False o Don't know 2 of 20 Liquid X has a surface tension value of 35 mNm1 and liquid Y has a surface tension value of 50 mNm1 The interfacial tension between the two liquids could be determined using the capillary rise method True False Don't know The cohesive forces in liquid Y are stronger than the cohesive forces in liquid X True False Don't know X will spread on Y more readily than Y will spread on X False True Don't know The work of adhesion is the work required to separate liquid X from liquid Y at their interface True O False O Don't know
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