Mixtures Vs Compounds

Slide 1

• Mixtures
• Elements are not Bonded to each other
• Elements hold their own properties
• Formulas can have Any Ratio
• Easy to Separate
• eg. Saltwater
• NaCl . H2O
• Compounds
• Elements are Bonded to each other
• The Compound has its own properties
• Formulas have Fixed Ratios
• Difficult to Separate
• eg. Table Salt
• NaCl

Saltwater

• NaCl . H2O is made by mixing salt and water.
• Salt and water do not chemically react however.
• Saltwater has properties of both salt and water.
• Any amount of Salt mixed with any amount of Water makes saltwater. The Ratio is Not Fixed.
• Salt and Water can be easily separated through Crystalisation.
• Saltwater is therefore a Mixture

Table Salt

• NaCl is made by Reacting Sodium and Chlorine
• 2Na + Cl2 ---> 2NaCl
• For Every 2Na, 1Cl2 is needed. The Ratio is fixed.
• Sodium is a Reactive, Alkaline Metal
• Chlorine is a Reactive, Toxic Gas
• Salt is an Edible, Crystalline Solid
• Sodium and Chlorine are Difficult to Separate
• Table Salt is therefore a Compound

Slide 4

• Mixture or Compound?