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Mixtures and Solutions
Chemical Change
Modeling Chemical Reactions
Producing Useful Materials
Random
100

A mixture that can be easily seen and sorted

Heterogeneous mixture

100

Cutting a tomato is an example of this type of change

Physical Change

100
The these are found on the left side of a chemical equation

Reactants

100

Chemical and resources made by humans

Synthetic materials

100

The substance that gets dissolved by the solvent

Solute

200

A tool you can use to separate salt from saltwater

Hot plate (Stove, heat, etc.)

200

Reactants undergo chemical change to create these

Products

200
The law that states that matter cannot be created or destroyed

Law of conservation of mass

200

A long chain of molecules made up of repeating units called monomers. Their properties include strength, flexibility, and elasticity. 

Polymers

200

While cooking you notice that your onions turn from white to yellowish-brown. What type of change occurred to the onions?

Chemical Change

300

A heterogeneous mixture containing small undissolved particles that do not separate or settle out if the mixture is undisturbed

A colloid (Ex: Glass of Milk, Paint, whipped cream, smoke, etc.)

300

List three examples of evidence that a chemical change has occurred

Gas Production, Formation of Precipitate, and Color change.

300

This the following formula balanced:

2Fe + 3O2 = 2Fe2O3

No (2 Fe on one side and 4 Fe on the other)

300

What are two benefits of synthetic foods?

Longer lasting, cheap to produce, and safer to consume.

300

A substance that lowers the activation energy needed to start a chemical reaction

A catalyst

400

The part of a solution that is usually present in the largest amount and dissolves the other substances. (hint* Water is a common example of this)

Solvent

400

This reaction usually releases heat and energy

Exothermic Reaction

400
What type of chemical reaction is this?

2H2O2 -> 2H2O + O2

Decomposition Reaction

400

What are two benefits of synthetic fibers?

cheaper to produce, last longer, and clean easier

400

Chemical Formula for Carbon Dioxide

CO2

500
In order to increase the solubility of a solvent and/or solute, what would you change?

Temperature and/or pressure (pressure for gases)

500

Other than using a catalyst, what are two other ways you can increase the rate of reactions?

Increase temperature and increase surface area

500

Rust is formed from what kind of chemical reaction?

Synthesis Reaction
500
In the late 1800's, a chemist was working on an experimental compound. Forgetting to wash his hands before eating, he noticed that everything he ate tasted sweet. What did he discover?

Artificial sweeter

500

In the 1940's, a chemist working on plastic gun sights synthesized a material called cyanoacrylate that frustratingly stuck to everything it touched. A few years later, the chemist came up with an important purpose for the sticky material. What material did the chemist make?

Superglue