Physical Properties
Which of the following is not an intensive property?
Density, boiling point, solubility, or mass
What is mass?
Classify as an element, compound, heterogeneous mixture (colloid/suspension) or homogeneous mixture (alloy/solution):
Carbon monoxide
What is an element?
What is decanting?
Toxicity
Substances present at the start of a reaction.
What are the reactants?
Name two physical properties that could be used to distinguish between water and ethanol.
What are density, boiling point, odor, taste (among others)?
Classify as an element, compound, heterogeneous mixture (colloid/suspension) or homogeneous mixture (alloy/solution):
Air
What is a homogeneous mixture?
What is centrifugation?
Charcoal burns in a grill.
What is a chemical change?
Substances produced in a reaction.
What are products?
The state of matter of mercury at room temperature.
What is a liquid?
Classify as an element, compound, heterogeneous mixture (colloid/suspension) or homogeneous mixture (alloy/solution):
Sulfur
What is an element?
This technique takes advantage of the the substances in a mixture having different boiling points.
What is distillation?
Mowing the lawn.
What is a physical change?
The solid that forms and settles out of a liquid mixture.
What is a precipitate?
Which property could not be used to distinguish between table sugar and table salt?
boiling point, color, melting point, density
What is color?
Classify as an element, compound, heterogeneous mixture (colloid/suspension) or homogeneous mixture (alloy/solution):
Bronze
What is a homogeneous mixture and alloy (copper and tin)?
A method of separating two substances using a mobile phase (typically a liquid or gas) and stationary phase (typically a solid).
What is chromatography?
Steel rusting.
What is a chemical change?
Which of the following terms is not used to describe a chemical change?
Transmutation, Fermentation, Decomposition, or Combination
What is combination?
This has an indefinite shape, definite volume, and cannot be easily compressed.
What is a liquid?
In an aqueous sugar solution, _________________ is the solute and _________________ is the solvent.
What are sugar and water, respectively?
The number of phases in a solution.
What is one?
Heating salt to dissolve it in water.
What is a physical change?
True or False:
During any chemical reaction, the mass of the products is always equal to the mass of the reactants.
What is true?