Physical properties
What is a physical property?
A property that can be measured or observed without changing the chemical identity of the substance.
What is the definition of Density?
How compact an object is
What is an element?
An object made of one type of atom
What is the physical property of magnetism?
Testing if there is an attraction between a solution and a magnet
How do we calculate the density of an object?
We divide the weight (mass) by the volume or g/ml
What is a compound?
A group of two or more atoms chemically bonded together.
What is the physical property of solubility?
How well a solution can dissolve in water.
The density would be 1.37 g/mL
What is a mixture?
A group of elements and compounds that are physically combined
How can we use magnetism to separate a mixture?
We can see what elements in a mixture are magnetic and separate them from the ones that don't.
Liquid A weighs 63 grams in a 50 mL container
Liquid B weighs 84 grams in a 70 mL container
Liquid C weighs 37 grams in a 20 mL container
Which liquid has the highest density?
Liquid C
What are pure substances?
A substance that is made of one type of element or compound
How can we use solubility to separate a mixture?
We can see what elements in a mixture can dissolve in water and separate them from the ones that do not.
Water has a density of 1 g/mL
Rubbing alcohol has a density of .79 g/mL
Corn oil has a density of .93 g/mL
If all of these liquids were poured into a graduated cylinder, what would the order be from top to bottom
Rubbing alcohol, corn oil, water
What is the difference between a Heterogeneous and a Homogeneous mixture?
Heterogeneous: a mixture with visibly different parts
Homogeneous: a mixture with a constant composition