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Chemestry Section Review Chapter 14

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Classify the following as either suspensions, colloids, or solutions...

Sand mixed with water.
Sand mixed with water is a suspension because sand will eventually settle to the bottom. The molecules of the sand do not become evenly distributed among the water.
Classify the following as either suspensions, colloids, or solutions...

Brass Doorknob
A brass doorknob is a solution because it does not seperate on standing, nor by filtration.
Classify the following as either suspensions, colloids, or solutions...

An Atmospheric Cloud
An atmospheric cloud is a colloid because it has disperesed particles and scatters light (Tyndall Effect).
Classify the following as either a heterogeneous or Homogeneous mixture...

Orange Juice
Orange Juice is a heterogeneous micture because the pulp and what not in the orange juice will eventually settle to the bottom. It doesnt all become one substance.
Classify the following as either a heterogeneous or Homogeneous mixture...

Tap Water
Tap water is a homogeneous mixture because it is all one solution without any other visible different parts that will settle if left alone for a while.
What are the properties of a...

Solution?
Homogeneous

0.01 - 1 nm solute particles:atoms, ions molecules

Does not seperate on standing

Cannot be seperated by filtration

No light scattering
What are the properties of a...

Colloids
Heterogeneous

1-1000 nm dispersed particles: particles or large molecules

Does not seperate on standing

Cannot be seperated by filtration

Scatters light (Tyndall Effect)
What are the properties of a...

Suspensions
Heterogeneous

Over 1000 nm suspended particles: large particles or aggregates

Particles settle out

Can be seperated by filtration

May scatter light, but not transparent.
What is an...

Alloy?
Alloys are mixtures or solutions in which the atoms of two or more elements (usually metals) are uniformly mixed.
What is a...

Solution
A solution is a homogeneous mixture of two or more substances in a single phase.
What is a...

Solvent
The dissolving medium in a solution is called the solvent.
What is a...

Solute
The substance dissolved in a solution is called the solute.
What is an...

Electrolyte
A substance that dissolves in water to give a solution that conducts electric current is called an electrolyte.
What is a...

Nonelectrolyte
A substance that dissolves in water to give a solution that does not conduct an electric current is caled a nonelectrobyute

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