States of Matter
This state of matter is characterized by having no definite shape and no definite volume.
Gas
What is the difference between a homogeneous mixture and a heterogeneous mixture?
In a homogeneous mixture, everything is uniformly mixed and we cannot visibly see the different parts. In a heterogeneous mixture, we can see the different parts.
What numbers does the pH scale range from?
1-14
This state of matter is characterized by a definite shape and volume.
Solid.
Water goes from the liquid state to the gaseous state. What phase change is this?
Evaporation
A Starbucks drink where you can see the separate layers of espresso, milk, and whipped cream is this type of mixture.
Heterogeneous mixture
If a solution has a pH of exactly 7, it is called ___________.
neutral
What are the substances on the left side of a chemical reaction called?
Reactants
Heat energy is absorbed during this specific phase change involving a solid becoming a liquid
Melting.
Mixing together lemon juice, sugar, and water to make lemonade. Is this a physical change or a chemical change?
Physical change
Human saliva has a pH of 6.5, which places it into this category on the pH scale.
Acidic
Name a phase change that would result in a decrease in the motion of molecules.
Freezing or Condensation
When thermal energy increases in a closed bottle, do the molecules move faster or slower, causing the container to expand?
Faster
You leave your bicycle outside and it is exposed to rain. A week later, you notice a brown rust on the metal. Is this a physical change or a chemical change?
Chemical change
This specific tool would be the most effective way to separate a mixture of magnetic iron filings and small black pepper particles.
Magnet
NaCl
NaCl2
Are these considered the same substance? Why or why not?
No, they are made up of different amounts of sodium and chlorine atoms.
To determine if a substance would be a liquid or a gas at room temperature, scientists look at this specific temperature point.
Boiling point
The three primary categories of the periodic table are ___________, ____________, and _____________.
Metals, non-metals, and metalloids.
A cleaning product has a pH of 8.5. Is this solution a strong base or a weak base?
Weak base
State the law of conservation of mass.
Matter is neither created nor destroyed in chemical reactions or physical changes.