Properties of Matter

Question 1

Properties

Answer 1

characteristics that allows us to recognize and distinguish other substances

Question 2

What are the different types of properties ?

Answer 2

1. physical - measured w/o changing identity and composition. ex: color, odor, denisty,
2. chemical properties - substance may change or react to form other substances.

Question 3

What are the two types of chemical properties?

Answer 3

• intensive - amount doesnt matter
• extensive- depend on quantity of the sample and include measurement of mass and volume

Question 4

Physical change

Answer 4

1. appearance changes but composition doesnt
2. changes of state ex: water

Question 5

chemical changes/ reactions

Answer 5

1. substance is transformed into a chemically different substance
2. ex: hydrogen burns in air to form water

Question 6

Distillation

Answer 6

1. is a process in which a mixture of liquids or liquids and solids can be separated by its boiling points
2. salt water - boil the salt water and only the water forms vapor.
3. petroleum liquids - each one has a different boiling point. gasoline has the lowest therefore, it will evaporate first.

Question 7

filtration

Answer 7

1. process that separates the solid and liquids parts of mixture
2. EX: take a piece of filter paper. put a mixture of sand and water on top of the paper. the liquid goes throught the filter paper while the sand remains on the top.

Question 8

Chromatography

Answer 8

1. way to separate different molecules in a mixture.
2. ex: put a drop from a mixture of amino acids near one end of the chromatography paper. put the end of the paper in a solvent like alchol. different molecules in the amino acids mixture move different distances up the paper,separating the molecules in the mixture