Types of Matter
Separating Mixtures
IMFs
100
What term describes matter that is made only 1 type of atoms?
Pure Element
100
Name a separation technique that can be used for a mixture of soil and water.
Filtration
100
What is the fundamental cause of intermolecular forces?
Electrostatic Attraction (opposite charges attracting each other)
200
Categorize the following as an Element, Compound, or Mixture: Sugar dissolved in water.
Mixture
200
You have a solution of sugar dissolved in water, what separation technique will you use to separate them?
Evaporation
200
What are the general term for the forces of attraction that exist between substances, which are not chemical bonds?
Intermolecular Forces (IMFs)
300
What is a pure substance made up of two or more elements chemically bonded together, whose properties are different from its constituent elements?
A compound
300
What separation technique that results in the formation of a pure solid particles of a substance from a solution containing the dissolved substance.
Crystallization
300
Look at the models of Acetone (polar) and Propane (nonpolar) below. Which substance would have the higher boiling point and what does that tell you about its IMFs?
Acetone has stronger IMFs (Dipole-Dipole) compared to Propane (Dispersion), which requires more energy (a higher temperature) to break the forces and boil.
400
Is salt & sand a homogeneous or heterogeneous mixture?
Heterogenous Mixture
400
Describe the basic concept of how a distillation apparatus works.
Heating a liquid mixture to its boiling point, collecting the vapor, and condensing it back into a liquid (distillate) that is collected in a separate container as a pure substance.
400
(Honors Only) Rank the three main types of intermolecular forces from weakest to strongest.
1. Dispersion Factors
2. Dipole - Dipole
3. Hydrogen Bonding
500
Draw a particle level model for a mixture of 2 compounds and a pure element
500
You are distilling a mixture of water (bp = 100OC) and methanol (bp = 65OC). Which substance would you collect first and why?
Methanol would be collected first because its boiling point is lower. When that temp is reached first the methanol will boil off leaving behind the water.
500
(Honors Only) What type of IMF exists between two molecules of Hydrogen Sulfide (H2S)?
Dipole-Dipole forces