A substance that can not be broken down into simpler substances.
100
What is an intensive property?
A property that does not depend on the amount of matter present.
100
Name two separation techniques that we used in lab.
Filtration and Chromatography
100
What is a Mixture?
A mixture is the physical combination of two or more substances.
100
What is the formula for percent composition?
(Part/Whole) x 100= Percent Composition
200
Which of the following can not be broken down into simpler substances?
A) Gold
B) Water
C)Ethanol
Gold
200
Volume is an example of a
1) chemical change
2) physical change
3) intensive property
4) extensive property
Extensive Property
200
What are three properties that we can use to separate mixtures?
Density, Particle Size, Boiling Point
200
A heterogeneous mixture can not be
A) salt dissolved in water
B) A chocolate chip cookie
C)lemonade
D) A black marker
A chocolate chip cookie.
200
If sand has a mass of 66 g and a mixture of sand and salt had a mass of 100 grams. What is the percent composition of sand?
66%
300
What is a homogeneous mixture?
A mixture that has a constant composition throughout
300
Which statement describes a chemical property?
A)Its crystals are a metallic gray.
B)It dissolves in alcohol.
C)It is round in shape.
D)It reacts with hydrogen to form a gas.
It reacts with hydrogen to form a gas
300
What is an immiscible liquid?
Two liquids that can not mix together.
300
What is a pure substance?
1) A compound
2) A heterogeneous mixture
3) A homogeneous mixture
4) Salt and water mixed together
A compound
300
What is a miscible liquid?
Two liquids that will mix together.
400
An alloy is considered a:
1) element
2) compound
3) Heterogeneous Mixture
4) Homogeneous mixture
A homogeneous mixture
400
What physical property of copper always stays the same?
A) Volume
B) Length
C) Density
D) Mass
Density
400
What physical property of the iron filings allowed you to separate them from the sand, salt and iron filings mixture in lab?
Iron Filings are magnetic. We used a magnet to remove them.
400
What is the Solvent Front?
The Solvent Front is the furthest point a solvent travels.
400
What is the difference between an observation and a conclusion?
An observation is something you see while a conclusion is something you reach after analyzing the data.
500
How does a compound differ from a mixture?
A compound will always have a heterogeneous mixture. Compounds consist of two or more different elements
500
Explain if a physical or chemical change occurred during the chromatography lab
A physical change occurred.
500
Explain how you were able to separate the sand from the salt?
The sand particles were too big to pass through the filter paper. However, the salt was dissolved in the water and passed directly through the filter paper into a beaker below.
500
In which of the following do the substances lose their chemical properties?
A) Homogenous Mixture
B) Heterogenous Mixture
C) Compound
A compound.
500
You find the mass of sand and salt in a beaker to be 200 g. The mass of the beaker is 50 grams. When the salt is separated in the beaker it has a mass of 60 grams. What is the percent composition of salt?