SODIUM CHLORID

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SODIUM CHLORID

• Martina Sigetová
• Silvie Kolibacová

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Properties

• Chemical compound with the formula NaCl
• Common salt, table salt or halite
• With an ionic bond and electrostatic forces
• Crystal structure with cubic symmetry

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History

• Roman soldiers were at certain times paid with
  salt
• roads were built to make transportation of salt
  to the capital city
• Salt has played a prominent role in determining
  the power and location of the world's great
  cities

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Occurrence

• Seawater (Dead Sea)
• Salt lakes
• Brine
• Mining rock salt halite

Brine solanka Mining - tažba
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Synthetic uses

• To produce chlorine, PVC, pesticides
• 2NaCl 2H2O ? Cl2 H2 2NaOH
• (electrolysis of sodium chloride dissolved in
  water)
• Solvay proces to produce sodium carbonate,
  calcium chloride

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Food uses

• Flavour enhancer
• Preservative for food
• Negative increased hear attack
• blood pressure (hypertension)
• dehydrate the human body

Enhancer zlepšovac chuti
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Biological uses

• Water is drawn out cells by osmosis
• - preserve some food
• Disinfect wounds
• Cleansing agent ?

Wound rana Draw out - odoberat
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Halite

• Mineral form of NaCl rock salt
• colourless to yellow, but may also be light blue,
  dark blue, and pink

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Road salt

• De-icing solution of table salt in water, the
  freezing temperature becomes -21 C
• Common chemicals sodium chloride and calcium
  chloride are very similar and effective in
  de-icing roads
• Additives potassium iodide - iodized salt to
  reduce simple goiter

Additives prídavné látky Goiter - struma
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Thank you for your attention