IB Biology SL D2.3.1 Solvation with Water Questions

Analyse how polar water molecules hydrate ions and polar solutes and support aqueous dissolution in IB Biology SL D2.3.1.

Exam points

Explain how water polarity and hydrogen bonding attract ions and polar solutes in aqueous solution.

[Maximum number: 3]

The figure represents a water molecule.

Water has important solvent properties. Explain these properties using an example to illustrate your answer.

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a	water molecule is polar OR water has «weak» positive and negative charges
b	substances that dissolve in water are hydrophilic
c	water forms hydrogen bonds with polar substances
d	positive/hydrogen side/pole of water attracted to negative ions OR negative/oxygen side/pole attracted to positive ions
e	glucose/other example dissolves because it is polar OR sodium chloride/other example dissolves because ions are attracted to water