Water properties
Understandings:
• Water molecules are polar and hydrogen bonds form between them.
• Hydrogen bonding and dipolarity explain the cohesive, adhesive, thermal and solvent properties of water.
• Substances can be hydrophilic or hydrophobic.
Applications and skills:
• Application: Comparison of the thermal properties of water with those of methane.
• Application: Use of water as a coolant in sweat.
• Application: Modes of transport of glucose, amino acids, cholesterol, fats, oxygen and sodium chloride in blood in relation to their solubility in water.
Guidance:
• Know at least one example of a benefit to living organisms of each property of water.
• Transparency of water and maximum density at 4°C do not need to be included.
• Comparison of the thermal properties of water and methane assists in the understanding of the significance of hydrogen bonding in water.
• Water molecules are polar and hydrogen bonds form between them.
• Hydrogen bonding and dipolarity explain the cohesive, adhesive, thermal and solvent properties of water.
• Substances can be hydrophilic or hydrophobic.
Applications and skills:
• Application: Comparison of the thermal properties of water with those of methane.
• Application: Use of water as a coolant in sweat.
• Application: Modes of transport of glucose, amino acids, cholesterol, fats, oxygen and sodium chloride in blood in relation to their solubility in water.
Guidance:
• Know at least one example of a benefit to living organisms of each property of water.
• Transparency of water and maximum density at 4°C do not need to be included.
• Comparison of the thermal properties of water and methane assists in the understanding of the significance of hydrogen bonding in water.
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Research the properties of methane. How does it compare to water?
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