Unit 1 Review:Equipment, Safety

& Classifying Matter

List four indications that a chemical reaction has occurred.

1.Heat/Light2.Color Change3.Gas produced4.Precipitate

_______ does the dissolving in a solution.

• Solvent

Which piece of equipment do you use for obtaining an accurate

measurement of volume?

• Graduated cylinder

H2 + O2 H2OList the reactant(s)

• H2, O2

Identify:• Florence Flask

List an example of a homogeneous mixture.

• Homogeneous = sugar water, salt water, air

____ is a form of energy

• Heat

How can you tell that an endothermic process is taking place?

• Feels cold to the touch

What is the hottest part of a Bunsen burner flame?

• Top of inner cone

What should you fill the wash bottles with?

• Distilled water ONLY

_______ is a pure substance that is made from atoms of two or more elements that

are chemically combined

Compound

What is a chemical change?

• Chemical change = results in a new substance with new properties

Identify:• Evaporating dish

H2 + O2 H2OList the product(s)

• H2O

What are some examples of improper lab attire?

• Flip-flops• Long hair not pulled back• Baggy sleeves• Long jewelry• Shorts• No goggles

Identify:

• Crucible & Cover

What are 2 types of pure substances?

• Elements & Compounds

What is the difference between a proper and improper Bunsen

burner flame?

• Proper is blue w/ 2 cones and an improper yellows at the top and an inner cone is not present.

Identify:

•Mortar & Pestle

What is a physical change?

• Physical change = does not change the identity of matter

______ is the study of the composition, structure and properties of matter

• Chemistry

You just made sugar water. What is the solute?

• sugar

What type of change would crumpling up a piece of paper be considered?

Physical change

What piece of equipment would you use as a cover to the

evaporating dish?

•Watch glass

What type of change would burning a piece of paper be considered?

• Chemical change

_______ is a pure substance made of only one kind of atom

• Element

How can you tell that an exothermic process is taking place?

• Feels hot to the touch

Define “matter”.

• Anything that has mass and takes up space

___________________ states that matter is neither created or destroyed by

ordinary chemical or physical changes

The Law Of Conservation Of Matter

Chemical changes are always accompanied by what type of change?

• Energy change!

______ is a mixture that is NOT uniform in composition throughout

• Heterogeneous mixture

________ is a process that releases heat

• Exothermic

________ gets dissolved in a solution

• Solute

What is the difference between a mixture and a compound?

• Mixture = pure substances are physically combined

• Compound = pure substances are chemically combined

Suppose put an ice cube on your hand. In what direction does heat travel? Be

specific

• From your hand to the ice cube

_________ is a solid that separates from a solution

• Precipitate

A homogeneous mixture can also be called a ______________?

• Solution

What does “aqueous” (aq) mean?

• A compound is dissolved in water

__________ is a mixture that is uniform in composition throughout

• Homogeneous mixture

List an example of a heterogeneous mixture.

• Heterogeneous = chicken soup, oil and water, sand, soil

What is energy?

The ability to do work or cause change

________ is a process that absorbs heat

• Endothermic

How is matter classified?...Draw the flow chart