Properties used to describe ____________ is anything that has mass and takes up space.
Define the following: a.
can be classified as _______________ or ____________.
Matter that has a uniform and definite composition is called a ______________.
True or False. Every sample of a given substance has identical intensive properties because every sample has the same composition.
Hardness, color, conductivity, and malleability are examples of _____________________.
Look at Table 2.1 on Page 40. a.
Which substance has the lowest melting point? b.
a. Which substance has the highest melting point? What are three
of matter? Draw a diagram of particles in each state of matter.
A _____________ is a form of matter that has a definite shape and volume. It is also not easily compressed.
A liquid is a form of matter that ___________________________________________ .
True or False. A gas has a definite shape, indefinite volume, and is easily compressed. 13.
In a solid, the particles are packed _____________________________________________ .
What is a gas?
What makes a
different from other gases?
During a ___________ ____________, some properties of a material change, but the composition of the material does not.
List as many examples of a
as you can think of or find in the section.
True or False. Physical changes can be reversible or irreversible.
Most samples of matter are ____________________.
A mixture in which the composition is not uniform throughout is a ______________________.
A mixture in which the composition is uniform throughout is a ________________________.
A _________________ is another name for a homogeneous mixture. 24.
True or False. A phase is used to describe any part of a sample with uniform composition and properties.
Circle One: a.
must consist of (2 or more phases OR a single phase).
may consist of (2 or more phases OR a single phase).
Answer Practice Problems 9 and 10 here:
NOTE: The ANSWERS to all PRACTICE PROBLEMS are at the back of your book!
What four methods can be used to separate mixtures? Your teacher will tell you the definitions for those not in the book!
Draw a picture of a distillation apparatus. Use figure 2.8 to guide you!
List several examples of homogeneous mixtures (a.k.a. solutions) and heterogeneous mixtures: homogeneous heterogeneous
What is the key difference between elements and compounds?
Which is found on the periodic table – elements or compounds?
For each of the following – state if it is a compound or an element: a.
Sugar b. carbon 37.
Copy the flow chart in Figure 2.11. c. water d. hydrogen e. oxygen 36.
True or False The properties of compounds are the same as those for the elements they’re made from.
Use the space below to answer practice problems 18 & 19: 18) 19) 39.
What is the chemical symbol for the following: a.
sodium b. potassium c. iron 40.
How many ‘parts’ potassium are there to each ‘part’ sulfur in K 2 S?
What is the ‘2’ number after the K called in #40?
Define the following: a.
‐ – –
What are some clues that a chemical change has occurred?
What is a
True or False When a chemical reaction occurs the mass at the end of the reaction is equal to the mass at the start of the reaction.
True or False The law of conservation of mass states that mass is only conserved in physical changes.
Identify the following as a physical change/property or chemical change/property: a.
Water boils b.
Iron rusts Burning bread Sugar dissolves in water Freezing an OtterPop n.
Yogurt going bad Tearing paper Two liquids mix and form a solid Neon is an unreactive gas k.
Melting an ice cube Silver tarnishes Mixing two liquids and noticing a temperature change m.
Hydrogen fluoride reacts with sodium hydroxide to form water and a salt Adding two clear colorless liquids and the solution turns green Fermentation Cooking a steak Mixing kool‐aid in water Evaporation You mix two chemicals and they emit a new odor You mix two liquids and they emit a gas u.
You heat a liquid and it goes into gaseous state An ice cube cools down a cup of lemonade w.
Aluminum reacts with copper (II) sulfate