Unit 7 Solutions and Suspensions Pages 104-107, 110-111, 122-123, and 130-133.
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Transcript of Unit 7 Solutions and Suspensions Pages 104-107, 110-111, 122-123, and 130-133.
Unit 7 Solutions and Suspensions
Pages 104-107, 110-111, 122-123, and 130-133
Solutions
• A solution is a mixture of items in which the particles are evenly mixed
• Ex: salt and water• Mostly common are liquid solutions.• Air is a gas solution.
Other solutions
• Tap water is a solution contains:• Iron• Calcium• Liquid chlorine• Nitrogen gas• Oxygen gas
Parts of a solution
• Salt dissolves in water.• Salt is called the solute.• Water is called the solvent.
Soluble verses Insoluble
• Soluble substances• Solute disappears or
mixes evenly • Ex: salt and water
• Insoluble substances• Solute stays visible• Ex: oil and water
Changing the rate items dissolve
• Ways to speed up dissolving:• Stirring• Heating• Breaking into smaller pieces• Adding pressure
Forming crystals
• Crystals will form when there is a LOT of solute in the solution.
• Fancy word: supersaturated• Crystals can be made in labs for use in:• Lasers and fiber optics• Computers and credit cards• Lab made gems
Suspensions
• A suspension is a mixture of materials that separate when left alone after time
• Ex: Soil and water, vinegar and oil salad dressing, smog (smoke and fog)
• The heavier, bigger items fall to the bottom• The particles are usually large and can be
seen, unlike in a solution.
Properties of suspensions
• In a suspension, the particles scatter light• Ex: Shining a flashlight through water with dirt
in it. You can see the beam of light travelling through.
• You cannot see the beam of light in a solution.