2.2
. You have a mixture of potassium chloride, water, and olive oil. How would you separate these materials from one another?
Allow the oil to separate from the potassium chloride- water solution and pour it off. Then distill off the water.
Antimony has the following chemical symbol: a. Au b. Ag c. Sb d. Sn
Sb
Which of the following is a homogeneous mixture? a. crunchy peanut butter b. pepperoni and mushroom pizza c. a glass of root beer d. macaroni and cheese
a glass of root beer
Identify each of the following as either a homogeneous or a heterogeneous mixture. a. motor oil _______________ b. sand __________________ c. sawdust _________________ d. milk __________________
a. homogeneous b. heterogeneous c. heterogeneous d. homogeneous
Classify each of the following as either a mixture or a pure substance: a. orange juice ___________ b. paper ____________ c. nitrogen _______________ d. blood _________________
a. mixture b. mixture c. pure substance d. mixture
One of the following is not a property of a mixture a. always has the same composition b. is a physical blend of two or more substances c. each component retains its own identity d. can be separated into components
always has the same composition
Would you rather have jewelry made of argentum or natrium? ____________
argentum
Only one of the following is not a characteristic of a compound a. composed of two or more elements b. cannot be broken down into simpler substances c. an undergo chemical changes d. elements are combined in fixed proportions
cannot be broken down into simpler substances
Only one of the following is a characteristic of a heterogeneous mixture a. composition is uniform throughout the mixture b. contains two or more phases c. is a pure substance d. the mixture composition is always the same
contains two or more phases
The symbol Cu designates the element a. copper b. lead c. mercury d. cobalt
copper
True or False: A specific chemical symbol can be used to designate more than one element
false
True or False: Distillation separates materials based on melting point.
false
True or False: Hot water is used to cool a distillation column.
false
True or False: Oil and water always mix evenly
false
True or False: Sodium chloride is a mixture of two elements.
false
True or False: The symbol Fe is used to represent the element lead.
false
The best way to separate lead pellets from ginger ale is a. hand-pick all the pellets b. distillation c. filtration d. melt the lead
filtration
The two elements found in a mixture of aurum and plumbum are ________________ and _______________.
gold, lead
A phase has all of the following characteristics except one a. uniform composition b. properties are the same throughout c. is always a pure substance d. can be a gas or a liquid
is always a pure substance
Which of the following is a pure substance a. oxygen b. air c. salt water d. maple syrup
oxygen
Distillation could not be used to separate one of the following: a. rubbing alcohol and water b. motor oil and brake fluid c. sand and gold d. gasoline fractions
sand and gold
The Latin name for tin is a. natrium b. kalium c. stibium d. stannum
stannum
True or False: A chemical symbol for an element can have one or two letters.
true
True or False: A heterogeneous mixture consists of two or more phases
true
True or False: A mixture can have more than two components.
true
True or False: The chemical symbol for potassium is K.
true