TEST - - Chapter 1 Flashcards
What is the term for the simplest form of matter that can exist under normal lab conditions?
Elements
What is the term for matter that takes both the shape and volume of the container?
Gas
What is the term for the study of composition of substances and the changes?
Chemistry
What is the term for part of a sample with uniform composition and properties?
Phase
What is the term for the starting substances in a chemical reaction?
Reactants
What is the term for a physical blend of two or more substances?
Mixture
What is the term for a substance that is formed in a chemical reaction?
Products
What is another term for a homogeneous mixture?
Solution
What is a term for the quality or condition of a substance that can be observed without changing the composition?
Physical property
Which is a compound?
Oxygen - Carbon - Water - Hydrogen
Water
What kind of change occurs when iron and oxygen combine to form iron oxide?
A chemical change occurs
What can help you determine a physical change from a chemical change?
Mass is conserved
What are three characteristics of a substance in the liquid state?
Able to flow
Definite volume
Not easily compressed
When does a chemical change occur in a piece of wood?
When is is burned or decayed
What are some examples of a physical change?
Cutting, freezing, condensing, grinding, melting, boiling
What form of matter takes the shape and volume of the container?
Gas
What are the three forms of matter?
solid, liquid and gas
Know what the chemical symbol of sodium is?
Na
What are examples of a chemical change?
Food digesting
Rotting meat
Burning wood
Know the 4 signs that a chemical reaction has occurred
Gas is created
Energy is changed
Precipitate is formed
Color change
Be able to state if the following is a homogeneous mixture, heterogeneous mixture, compound or element:
Table sugar Tap water Apple juice Vegetable soup Table salt Hydrogen Marble
Table sugar - - compound Tap water - - homogeneous Apple juice - - homogeneous Vegetable soup - - heterogeneous Table salt - - compound Hydrogen - - element Marble - - heterogeneous
Be able to state if the following was a chemical change or a physical change:
Dissolving sugar Water evaporating Digesting food Burning a match Carving a piece of wood Spoiled milk
Dissolving sugar - - physical Water evaporating - - physical Digesting food - - chemical Burning a match - - chemical Carving a piece of wood - - physical Spoiled milk - - chemical
How could you separate the rolling mixtures?
Water and alcohol
Sand and salt
Iron fillings and lead
Water and alcohol. - - Distillation - - boil the mixture - - vapors form and rises into a tube where the water will turn back into a liquid - - alcohol will remain
Sand and salt - - use water to dissolve the salt - - use a filter paper to remove the sand from the water - - let water evaporate and sand will remain
Iron filling and lead - - use a magnet to pull out the iron fillings
Be able to state the Law of Conservation of Mass
USE YOU NOTES
What is the term for a substance than can only be separated into simpler substances by chemical reaction?
Compounds
Be able to fill in the matter chart
Use your notes
Be able to identify elements and their symbols
Use your notes
In lab - we started with purple powder and added HCl - - the powder fizzes and produced a white substance - - was the purple powder a compound or element?
Compound - - it was broken down into a simpler substance - - it is not possible to do with an element
