Classifying Matter
__________ refers to the amount of matter an object has.
What is mass?
Results in the change of the composition and identity of a substance.
The KMT states that ....
What is "atoms that make up all matter are constantly moving?"
A solution is defined as ...
What is "a homogeneous mixture that is created when one substance dissolves another?"
Define density.
What is "how tightly packed the atoms are in a substance?"
Gold would best be classified as a(n) ...
What is an element?
Phase changes are an example of ________ changes. Explain WHY.
What is a physical change because a new substance is not formed (composition does not change!)
The particle attraction in solids is ...
What is "very high?"
The 2 parts of a solution are ...
What is "the solute and solvent?"
Density depends on the ____ and _____ of an object.
What is "mass and volume?"
If a substance can only be separated chemically, it is classified as a(n) ...
What is a pure substance?
What is a chemical change?
As heat energy is added to a substance, its ____ will increase, BUT its _____ will decrease.
What is "KE increases, but particle attraction decreases?"
Name the solute(s) and solvent(s) in a can of soda.
What is "solutes include carbon dioxide, flavoring, syrup and the solvent is water."
Density will ____ change for a particular substance.
What is "never?"
Pure water would be classified as a(n) ______ but salt water would be classified as a(n) ______.
***BE SPECIFIC!***
What is water would be classified as a compound and salt water would be a homogeneous mixture?
Water from a salt water lake is evaporated into the atmosphere. Over time deposition occurs and snow is formed.
What is a physical change?
This term describes the process of particles that are very tightly packed, being shifted to where they can move freely in all directions.
*Name the term and give an example for full points!
What is "sublimation?"
Ex: Dry Ice
_______ refers to a solution that contains less than the maximum amount of solute that can be dissolved.
What is "unsaturated?"
If something has a density greater than 1 it will _______, but if it is less than 1 it will _______.
What is "sink in water if greater than 1, and float in water if less than 1?"
Give 3 differences between homogenous and heterogeneous mixtures.
- homogenous is spread evenly throughout
- heterogeneous you can see all the different parts
- heterogeneous mixtures are more impure than homogeneous mixtures (or vice versa)
List 3 definite signs that a chemical change is occuring.
- bubbles forming (gas)
- precipitate forms (a solid)
- heat production
- light production
- color change
Give an example of 1 substance moving through the entire phase change diagram using PROPER terminology.
*Hint: about 10 total steps!
What is:
"Ice can be melted into a liquid, then evaporated/vaporized into water vapor. The water vapor can deposit back into ice. The ice can sublime into a water vapor, then condensate into a liquid and freeze into a solid."
A solution contains 4.6 milliliters of glucose and 5.4 milliliters of water. What is its percent concentration?
***Be prepared to share and show your work! If unable, you will not win the points!***
What is "46%?"
Solve the problem, show all work!
What is the volume of a tank that can hold 18,754 g of methanol whose density is 0.788g/cm3 ?
What is:
V = m/D
V = (18,754g)/(0.788g/cm3)
V = 23,799.5 cm3