Module 1d

Module 1d - A practical application Evaporation of seawater...

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Substances and Mixtures Elements cannot change into other elements Carbon – Diamonds and Graphite Both extended structures with no chemical formula other than C Diamonds – very strong bonds Graphite – weaker bonds “Buckyballs” A definite chemical formula C60 Created in electric arcs between graphite electrodes Named after Buckminster fuller Composed of 5 and 6 membered rings Mixtures vs. Pure substances Typical alloys of gold 24 karat gold – pure gold 18 karat gold –less pure More complex mixture Sand – saltwater Saltwater – homogeneous Sand – heterogeneous Mixtures often can be separated by physical means
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Unformatted text preview: A practical application Evaporation of seawater in huge SF Bay Salt ponds used for commercial production of salt Some important compounds H20 – required for all forms of life C2h5oh – results from fermentation CO – highly toxic it binds to hemoglobin in the blood NaCL – dominant compound in sea water CO2 – product of respiration/ greenhouse effect Chemical change – Combustion Burning of a candle converts wax to co2 and h2o Yellow glow results from particles (soot) that have been heated by energy released in combustion...
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This note was uploaded on 04/04/2008 for the course CHM 2083 taught by Professor Mari during the Spring '08 term at FAU.

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