unique+properties+of+water

//**Unique properties of water**//


 * Videos**

Properties of water || media type="custom" key="23580368" Everything about water || media type="custom" key="23580414" Conductivity of water ||
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Conductivity of different 'types' of water ||
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 * Common Misconceptions:**
 * When water boils and bubbles, the bubbles are air, oxygen or hydrogen, or heat.
 * Ice molecules are colder than water molecules.
 * Pure water is a good conductor of electricity.
 * Condensation on the outside of a container is water that seeped (or sweated) through the walls of the container.
 * Water only gets evaporated from the ocean or lakes.
 * Per head, the amount of time a person spends in the shower, not their diet, is a major determining factor of water consumption.
 * Hydrogen bonding can occur between H and all other non-metals.
 * More about hydrogen bonds:
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> Hydrogen bonds are strong compared to other intermolecular forces. > nutritional value, uses half that amount. > free-moving ions. The solution then becomes a good electrical conductor. A solution that conducts electricity is called an electrolyte.
 * Interesting facts:**
 * Only a fraction of all the water on the Earth's surface is available to living things (97.5% is saline, of the 2.5% freshwater, 0.5% is accessible).
 * Water is the only substance commonly found in all three states (solid, liquid, gas) under normal conditions found on Earth.
 * Water has relatively higher melting and boiling temperatures compared to other molecules because of the hydrogen bonds present between the molecules.
 * It takes 13 times more water to produce 1 kg of meat compared to 1 kg of cereal. A meat-eater's diet uses 5400 L of water per day. A vegetarian diet, providing the same
 * Hydrogen bonding can only occur between H to N, O or F.
 * Hydrogen bonding between water molecules are responsible for water's high specific heat capacity of 4.2 J/g/degrees Celsius.
 * Polar covalent compounds like sugar and ethanol can dissolve in water.
 * Pure water is a covalent molecular substance and therefore is a poor conductor of electricity. When compounds like NaCl dissolve in water, the solution formed contains


 * Resources:**
 * Water in the natural environment from City West Water.
 * Water module resources from Sustainability Victoria.
 * Concentration simulation from PhET.
 * Solubility rules from University of South Carolina Analytical Chemistry.
 * Electrical conductivity information sheet from Water Watch Goulburn/Broken Catchment.